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544 lines
12 KiB
544 lines
12 KiB
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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std::string toBits(unsigned int i, int maxbits);
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/*
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The function converts a 16bit GRBG 2x2 CFA coded image into an 8bit
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RGB image by setting the missing RGB values to zero.
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*/
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void debayer_grbg16_simple (uint16_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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// GG RR
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// BB GG
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uint16_t t;
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uint8_t r, g, b;
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int ys, yd, xs, xd;
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for (ys = 0, yd = 0; ys < src_h && yd < dst_h; ys++, yd++) {
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for (xs = 0, xd = 0; xs < src_w; xs++) {
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/* read the pixel but only the higher 8bit, assuming data is little endian */
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t = (*(src++) >> 8) & 0xff;
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if (xs & 1) {
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if (ys & 1) {
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// lower right green pixel
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b = 0; g = t; r = 0;
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} else {
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// upper right red pixel
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b = 0; g = 0; r = t;
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}
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} else {
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if (ys & 1) {
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// lower left blue pixel
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b = t; g = 0; r = 0;
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} else {
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// upper left green pixel
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b = 0; g = t; r = 0;
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}
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}
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/* only paint the image if the source is within the destination */
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if (xd < dst_w) {
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/* set the pixel */
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*(dst++) = r;
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*(dst++) = g;
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*(dst++) = b;
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xd++;
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}
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}
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/* if the source image is too small ignore the other places */
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if (xd < dst_w)
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dst += 3 * (dst_w - xd);
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}
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}
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// macros to make code better readable
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#define CE (*(src))
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#define UP (*(src-src_w))
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#define DN (*(src+src_w))
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#define LE (*(src-1))
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#define RI (*(src+1))
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#define UPLE (*(src-src_w-1))
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#define UPRI (*(src-src_w+1))
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#define DNLE (*(src+src_w-1))
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#define DNRI (*(src+src_w+1))
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#define BITCONV(d) ((d>>8) & 0xff)
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#define STORE *(dst++) = BITCONV(r); *(dst++) = BITCONV(g); *(dst++) = BITCONV(b); src++;
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#define STORE8 *(dst++) = (r & 0xff); *(dst++) = (g & 0xff); *(dst++) = (b & 0xff); src++;
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/*
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The function converts a 16bit GRBG 2x2 CFA coded image into an 8bit
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RGB image by bilinear interpolation.
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*/
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void debayer_grbg16_bilinear (uint16_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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// GG RR GG RR
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// BB GG BB GG
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// GG RR GG RR
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// BB GG BB GG
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uint32_t r, g, b;
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int xs, ys;
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// start with upper left pixel (green)
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r = RI;
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g = CE;
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b = DN;
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STORE;
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// upper first line, starts with RR GG RR ...
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// red pixel
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r = CE;
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g = (LE + RI + DN) / 3;
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b = (DNLE + DNRI) / 2;
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STORE;
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// green pixel
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r = (LE + RI) / 2;
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g = CE;
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b = DN;
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STORE;
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}
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// upper right pixel (red)
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r = CE;
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g = (DN + LE) / 2;
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b = DNLE;
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STORE;
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// go through the "body" of the image
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for (ys = 1; ys < src_h - 1; ys+=2) {
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// every second line with BB GG BB GG (start at 2nd line)
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// left hand pixel (blue)
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r = (UPRI + DNRI) / 2;
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g = (UP + DN + RI) / 3;
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b = CE;
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STORE;
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// green pixel
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r = (UP + DN) / 2;
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g = CE;
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b = (LE + RI) / 2;
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STORE;
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// blue pixel
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r = (UPLE + UPRI + DNLE + DNRI) / 4;
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g = (LE + RI + UP + DN) / 4;
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b = CE;
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STORE;
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}
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// last pixel in line (green)
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r = (UP + DN) / 2;
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g = CE;
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b = LE;
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STORE;
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// every second line with GG RR GG RR ... (start at 3rd line)
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// left hand pixel (green)
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r = RI;
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g = CE;
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b = (UP + DN) / 2;
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STORE;
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// red pixel
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r = CE;
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g = (LE + RI + UP + DN) / 4;
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b = (UPLE + UPRI + DNLE + DNRI) / 4;
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STORE;
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// green pixel
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r = (LE + RI) / 2;
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g = CE;
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b = (UP + DN) / 2;
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STORE;
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}
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// last pixel in line (red)
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r = CE;
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g = (UP + DN + LE) / 3;
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b = (UPLE + DNLE) / 2;
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STORE;
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}
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// bottom left pixel
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r = UPRI;
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g = (UP + RI) / 2;
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b = CE;
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STORE;
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// last line starting with GG BB GG ...
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// green pixel
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r = UP;
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g = CE;
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b = (LE + RI) / 2;
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STORE;
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// blue pixel
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r = (UPLE + UPRI) / 2;
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g = (LE + UP + RI) / 2;
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b = CE;
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STORE;
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}
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// bottom right pixel (green)
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r = UP;
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g = CE;
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b = LE;
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STORE;
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}
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/*
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The function converts a 8bit GRBG 2x2 CFA coded image into an 8bit
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RGB image by setting the missing RGB values to zero.
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*/
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void debayer_grbg8_simple (uint8_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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// GG RR
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// BB GG
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uint8_t t;
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uint16_t r, g, b;
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int ys, yd, xs, xd;
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for (ys = 0, yd = 0; ys < src_h && yd < dst_h; ys++, yd++) {
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for (xs = 0, xd = 0; xs < src_w; xs++) {
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/* read the pixel but only the higher 8bit, assuming data is little endian */
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t = *(src++);
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if (xs & 1) {
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if (ys & 1) {
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// lower right green pixel
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b = 0; g = t; r = 0;
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} else {
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// upper right red pixel
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b = 0; g = 0; r = t;
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}
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} else {
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if (ys & 1) {
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// lower left blue pixel
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b = t; g = 0; r = 0;
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} else {
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// upper left green pixel
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b = 0; g = t; r = 0;
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}
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}
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/* only paint the image if the source is within the destination */
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if (xd < dst_w) {
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/* set the pixel */
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*(dst++) = r;
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*(dst++) = g;
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*(dst++) = b;
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xd++;
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}
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}
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/* if the source image is too small ignore the other places */
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if (xd < dst_w)
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dst += 3 * (dst_w - xd);
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}
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}
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/*
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The function converts a 8bit GRBG 2x2 CFA coded image into an 8bit
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RGB image by bilinear interpolation.
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*/
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void debayer_grbg8_bilinear (uint8_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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// GG RR GG RR
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// BB GG BB GG
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// GG RR GG RR
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// BB GG BB GG
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uint16_t r, g, b;
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int xs, ys;
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// start with upper left pixel (green)
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r = RI;
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g = CE;
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b = DN;
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STORE8;
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// upper first line, starts with RR GG RR ...
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// red pixel
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r = CE;
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g = (LE + RI + DN) / 3;
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b = (DNLE + DNRI) / 2;
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STORE8;
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// green pixel
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r = (LE + RI) / 2;
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g = CE;
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b = DN;
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STORE8;
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}
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// upper right pixel (red)
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r = CE;
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g = (DN + LE) / 2;
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b = DNLE;
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STORE8;
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// go through the "body" of the image
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for (ys = 1; ys < src_h - 1; ys+=2) {
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// every second line with BB GG BB GG (start at 2nd line)
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// left hand pixel (blue)
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r = (UPRI + DNRI) / 2;
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g = (UP + DN + RI) / 3;
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b = CE;
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STORE8;
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// green pixel
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r = (UP + DN) / 2;
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g = CE;
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b = (LE + RI) / 2;
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STORE8;
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// blue pixel
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r = (UPLE + UPRI + DNLE + DNRI) / 4;
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g = (LE + RI + UP + DN) / 4;
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b = CE;
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STORE8;
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}
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// last pixel in line (green)
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r = (UP + DN) / 2;
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g = CE;
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b = LE;
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STORE8;
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// every second line with GG RR GG RR ... (start at 3rd line)
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// left hand pixel (green)
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r = RI;
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g = CE;
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b = (UP + DN) / 2;
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STORE8;
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// red pixel
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r = CE;
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g = (LE + RI + UP + DN) / 4;
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b = (UPLE + UPRI + DNLE + DNRI) / 4;
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STORE8;
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// green pixel
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r = (LE + RI) / 2;
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g = CE;
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b = (UP + DN) / 2;
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STORE8;
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}
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// last pixel in line (red)
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r = CE;
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g = (UP + DN + LE) / 3;
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b = (UPLE + DNLE) / 2;
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STORE8;
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}
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// bottom left pixel
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r = UPRI;
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g = (UP + RI) / 2;
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b = CE;
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STORE8;
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// last line starting with GG BB GG ...
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for (xs = 1; xs < src_w - 1; xs+=2) {
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// green pixel
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r = UP;
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g = CE;
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b = (LE + RI) / 2;
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STORE8;
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// blue pixel
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r = (UPLE + UPRI) / 2;
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g = (LE + UP + RI) / 2;
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b = CE;
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STORE8;
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}
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// bottom right pixel (green)
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r = UP;
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g = CE;
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b = LE;
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STORE8;
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}
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int MAX(int a, int m) { if (a > m) return m; else return a; };
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void debayer_rggb10packet_simple (uint8_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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/* int s, d;
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int xs, ys, xd, yd;
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unsigned char r, g, b;
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int max = dst_w * dst_h * 3;
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unsigned char *pdst;
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unsigned char *psrc;
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int shift;
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printf ("%s:%d src size:%dx%d dst size:%dx%d\n", __FILE__, __LINE__, src_w, src_h, dst_w, dst_h);
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// RR GG RR GG HH RR
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// GG BB GG BB HH GG
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// RR GG RR GG HH RR
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// GG BB GG BB HH GG
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for (ys = 0, yd = 0, psrc = src, pdst = dst; ys < dst_h; ys++, yd++) {
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r = 0;
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g = 0;
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b = 0;
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for (xs = 0, xd = 0; xd < dst_w; xs++, xd++) {
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r = 0; b = 0; g = 0;
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if (ys > 0 && ys < src_h-1 && xs > 0 && xs < src_w-1) {
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if (ys&1) {
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if (xs&1) {
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b = *psrc;
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g = (P_L + P_R + P_U + P_D)/4;
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r = (P_UL + P_DL + P_UR + P_UL)/4;
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}
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else {
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b = (P_L + P_R)/2;
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g = *psrc;
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r = (P_U + P_D)/2;
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}
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}
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else {
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if (xs&1) {
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b = (P_U + P_D)/2;
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g = *psrc;
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r = (P_L + P_R)/2;
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}
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else {
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g = (P_L + P_R + P_U + P_D)/4;
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b = (P_UL + P_DL + P_UR + P_UL)/4;
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r = *psrc;
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}
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}
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}
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if (pdst - dst > max) {
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printf ("debayer error. dpst out of bounds size:%dx%d pos:%dx%d \n", dst_w, dst_h, xd, yd);
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}
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if ((ys == 10 || ys == 11) && xs < 10) printf ("%dx%d - %d, %d, %d\n", xs, ys, r, g, b);
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pdst[0] = MAX(r, 0xff);
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pdst[1] = MAX(g, 0xff);
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pdst[2] = MAX(b, 0xff);
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if (yd < 100 && xd < 300) {
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pdst[0] = 0; if (xd < 100) pdst[0] = 255;
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pdst[1] = 0; if (xd > 100 && xd < 200) pdst[1] = 255;
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pdst[2] = 0; if (xd > 200 && xd < 300) pdst[2] = 255;
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}
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pdst += 3;
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psrc++;
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if (xs && (xs % 4 == 0)) psrc++;
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}
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} */
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};
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std::string toBits(unsigned int i, int maxbits) {
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int b;
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std::string out = "";
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for (b = 0; b < maxbits; b++) {
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if (b % 8 == 0 && b) out = ":" + out;
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if (i % 2) out = "1" + out;
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else out = "0" + out;
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i = i >> 1;
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}
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return out;
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}
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void debayer_rggb10packet_bilinear (uint8_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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debayer_rggb10packet_simple (src, src_w, src_h, dst, dst_w, dst_h);
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};
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inline int swap16(uint16_t i) {
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uint16_t r;
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*(((unsigned char *)&r)) = *(((unsigned char *)&i)+1);
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*(((unsigned char *)&r)+1) = *(((unsigned char *)&i));
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return r;
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}
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#define PRGGB10_U ((uint16_t)(*(psrc-src_w*2)))
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#define PRGGB10_D ((uint16_t)(*(psrc+src_w*2)))
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#define PRGGB10_L ((uint16_t)(*(psrc-2)))
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#define PRGGB10_R ((uint16_t)(*(psrc+2)))
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#define PRGGB10_UL ((uint16_t)(*(psrc-2-src_w*2)))
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#define PRGGB10_UR ((uint16_t)(*(psrc+2-src_w*2)))
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#define PRGGB10_DL ((uint16_t)(*(psrc-2-src_w*2)))
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#define PRGGB10_DR ((uint16_t)(*(psrc+2+src_w*2)))
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void debayer_rggb10_simple (uint8_t * src, int src_w, int src_h,
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uint8_t * dst, int dst_w, int dst_h) {
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int xs, ys, xd, yd;
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uint16_t r, g, b, data;
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int max = dst_w * dst_h * 3;
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unsigned char *pdst;
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unsigned char *psrc;
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for (ys = 0, yd = 0, psrc = src, pdst = dst; ys < dst_h; ys++, yd++) {
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r = 0;
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g = 0;
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b = 0;
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for (xs = 0, xd = 0; xd < dst_w; xs++, xd++) {
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r = 0; b = 0; g = 0;
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if (ys > 0 && ys < src_h-1 && xs > 0 && xs < src_w-1) {
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if (ys&1) {
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if (xs&1) {
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b = *psrc;
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g = (PRGGB10_L + PRGGB10_R + PRGGB10_U + PRGGB10_D)/4;
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r = (PRGGB10_UL + PRGGB10_DL + PRGGB10_UR + PRGGB10_UL)/4;
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}
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else {
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b = (PRGGB10_L + PRGGB10_R)/2;
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g = *psrc;
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r = (PRGGB10_U + PRGGB10_D)/2;
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}
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}
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else {
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if (xs&1) {
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b = (PRGGB10_U + PRGGB10_D)/2;
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g = *psrc;
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r = (PRGGB10_L + PRGGB10_R)/2;
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}
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|
else {
|
|
g = (PRGGB10_L + PRGGB10_R + PRGGB10_U + PRGGB10_D)/4;
|
|
b = (PRGGB10_UL + PRGGB10_DL + PRGGB10_UR + PRGGB10_UL)/4;
|
|
r = *psrc;
|
|
}
|
|
}
|
|
}
|
|
if (pdst - dst > max) {
|
|
printf ("debayer error. dpst out of bounds size:%dx%d pos:%dx%d \n", dst_w, dst_h, xd, yd);
|
|
}
|
|
if ((ys == 10 || ys == 11) && xs < 10) printf ("%dx%d - %d, %d, %d\n", xs, ys, r, g, b);
|
|
pdst[0] = (r);
|
|
pdst[1] = (g);
|
|
pdst[2] = (b);
|
|
pdst += 3;
|
|
psrc += 2;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
void debayer_rggb10_bilinear (uint8_t * src, int src_w, int src_h,
|
|
uint8_t * dst, int dst_w, int dst_h) {
|
|
debayer_rggb10_simple(src, src_w, src_h, dst, dst_w, dst_h);
|
|
};
|
|
|
|
|