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quickwayne |
#include <stdio.h>
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#include "io.h"
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#if 0
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/*USED VALUES OF ROY's CODE THIS MIGHT LEAD TO PROBLEMS*/
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signed char RGB2Y (int r, int g, int b) {
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return ((66*r + 129*g + 25*b + 128)>>8)+128;
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}
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/*USED VALUES OF ROY's CODE THIS MIGHT LEAD TO PROBLEMS*/
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signed char RGB2Cr (int r, int g, int b) {
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return ((-38*r - 74*g + 112*b + 128)>>8)+128;
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}
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/*USED VALUES OF ROY's CODE THIS MIGHT LEAD TO PROBLEMS*/
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signed char RGB2Cb (int r, int g, int b) {
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return ((112*r - 94*g - 18*b + 128)>>8)+128;
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}
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void RGB2YCrCb(signed char pixelmatrix[MATRIX_SIZE][MATRIX_SIZE*3],signed char YMatrix[MATRIX_SIZE][MATRIX_SIZE],signed char CrMatrix[MATRIX_SIZE][MATRIX_SIZE],signed char CbMatrix[MATRIX_SIZE][MATRIX_SIZE])
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{
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unsigned int row, col;
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for(row = 0;row < MATRIX_SIZE; row++) {
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for(col = 0; col < MATRIX_SIZE; col++) {
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YMatrix[row][col] = RGB2Y(pixelmatrix[row][col*3+2],pixelmatrix[row][col*3+1],pixelmatrix[row][col*3]) - 128;
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CrMatrix[row][col] = RGB2Cr(pixelmatrix[row][col*3+2],pixelmatrix[row][col*3+1],pixelmatrix[row][col*3]) - 128;
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CbMatrix[row][col] = RGB2Cb(pixelmatrix[row][col*3+2],pixelmatrix[row][col*3+1],pixelmatrix[row][col*3]) - 128;
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}
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}
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}
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#endif
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#define RGB2Y(r, g, b) (((66*r + 129*g + 25*b + 128)>>8)+128)
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#define RGB2Cr(r, g, b) (((-38*r - 74*g + 112*b + 128)>>8)+128)
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#define RGB2Cb(r, g, b) (((112*r - 94*g - 18*b + 128)>>8)+128)
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void RGB2Y_matrix(signed char pixelmatrix[MATRIX_SIZE][MATRIX_SIZE*3],signed char YUVMatrix[MATRIX_SIZE][MATRIX_SIZE])
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{
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unsigned int row, col;
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for(row = 0;row < MATRIX_SIZE; row++) {
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for(col = 0; col < MATRIX_SIZE; col++) {
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YUVMatrix[row][col] = RGB2Y(pixelmatrix[row][col*3+2],pixelmatrix[row][col*3+1],pixelmatrix[row][col*3]) - 128;
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}
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}
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}
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void RGB2Cr_matrix(signed char pixelmatrix[MATRIX_SIZE][MATRIX_SIZE*3],signed char YUVMatrix[MATRIX_SIZE][MATRIX_SIZE])
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{
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unsigned int row, col;
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for(row = 0;row < MATRIX_SIZE; row++) {
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for(col = 0; col < MATRIX_SIZE; col++) {
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YUVMatrix[row][col] = RGB2Cr(pixelmatrix[row][col*3+2],pixelmatrix[row][col*3+1],pixelmatrix[row][col*3]) - 128;
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}
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}
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}
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void RGB2Cb_matrix(signed char pixelmatrix[MATRIX_SIZE][MATRIX_SIZE*3],signed char YUVMatrix[MATRIX_SIZE][MATRIX_SIZE])
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{
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unsigned int row, col;
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for(row = 0;row < MATRIX_SIZE; row++) {
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for(col = 0; col < MATRIX_SIZE; col++) {
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YUVMatrix[row][col] = RGB2Cb(pixelmatrix[row][col*3+2],pixelmatrix[row][col*3+1],pixelmatrix[row][col*3]) - 128;
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}
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}
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}
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