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Copy pathMalvarRaw.cpp
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MalvarRaw.cpp
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#include "pch.h"
#include "MalvarRaw.h"
inline static unsigned short saturate12bits(unsigned short value)
{
if (value < 0)
return 0;
else if (value > 4095)
return 4095;
else
return value;
}
void MalvarDemosaicing(int w, int h, const unsigned short* img_raw, unsigned char* img_data)
{
int size = w * h;
int w3 = w * 3;
int offsets[24] = { -w * 2,-w * 2 + 1,
-w - 1,-w,-w + 1,-w + 2,
-2,-1,0,1,2,3,
w - 2,w - 1,w,w + 1,w + 2,w + 3,
w * 2 - 1,w * 2,w * 2 + 1,w * 2 + 2,
w * 3,w * 3 + 1 };
for (int y = 2; y < h - 2; y+=2)
{
for (int x = 2; x < w - 2; x+=2)
{
int centerIndex = y * w + x;
int indexTT1 = centerIndex + offsets[0];
int indexTT2 = centerIndex + offsets[1];
int indexT1 = centerIndex + offsets[2];
int indexT2 = centerIndex + offsets[3];
int indexT3 = centerIndex + offsets[4];
int indexT4 = centerIndex + offsets[5];
int indexLL = centerIndex + offsets[6];
int indexL = centerIndex + offsets[7];
int indexC = centerIndex + offsets[8];
int indexR = centerIndex + offsets[9];
int indexRR = centerIndex + offsets[10];
int indexRRR = centerIndex + offsets[11];
int indexBLL = centerIndex + offsets[12];
int indexBL = centerIndex + offsets[13];
int indexBC = centerIndex + offsets[14];
int indexBR = centerIndex + offsets[15];
int indexBRR = centerIndex + offsets[16];
int indexBRRR = centerIndex + offsets[17];
int indexBB1 = centerIndex + offsets[18];
int indexBB2 = centerIndex + offsets[19];
int indexBB3 = centerIndex + offsets[20];
int indexBB4 = centerIndex + offsets[21];
int indexBBB1 = centerIndex + offsets[22];
int indexBBB2 = centerIndex + offsets[23];
unsigned short R[6];
unsigned short G[12];
unsigned short B[6];
R[0] = img_raw[indexTT1];
R[1] = img_raw[indexLL];
R[2] = img_raw[indexC];
R[3] = img_raw[indexRR];
R[4] = img_raw[indexBB2];
R[5] = img_raw[indexBB4];
G[0] = img_raw[indexTT2];
G[1] = img_raw[indexT2];
G[2] = img_raw[indexT4];
G[3] = img_raw[indexL];
G[4] = img_raw[indexR];
G[5] = img_raw[indexRRR];
G[6] = img_raw[indexBLL];
G[7] = img_raw[indexBC];
G[8] = img_raw[indexBRR];
G[9] = img_raw[indexBB1];
G[10] = img_raw[indexBB3];
G[11] = img_raw[indexBBB1];
B[0] = img_raw[indexT1];
B[1] = img_raw[indexT3];
B[2] = img_raw[indexBL];
B[3] = img_raw[indexBR];
B[4] = img_raw[indexBRRR];
B[5] = img_raw[indexBBB2];
unsigned char outR1, outG1, outB1;
unsigned char outR2, outG2, outB2;
unsigned char outR3, outG3, outB3;
unsigned char outR4, outG4, outB4;
int outIndex = (y * w + x) * 3;
int R1, G1, B1;
int R2, G2, B2;
int R3, G3, B3;
int R4, G4, B4;
R1 = R[2];
G1 = ((R[2] << 2) - (R[0] + R[1] + R[3] + R[4]) + ((G[1] + G[3] + G[4] + G[7]) << 1)) >> 3;
B1 = (((R[2] * 12) - ((R[0] + R[1] + R[3] + R[4]) * 3) + ((B[0] + B[1] + B[2] + B[3]) << 2)) >> 1) >> 3;
R2 = (((R[2] + R[3]) << 2) - (G[1] + G[2] + G[3] + G[5] + G[7] + G[8]) + ((G[0] + G[10]) >> 1) + (G[4] * 5)) >> 3;
G2 = G[4];
B2 = (((B[1] + B[3]) << 2) - (G[0] + G[1] + G[2] + G[7] + G[8] + G[10]) + ((G[3] + G[5]) >> 1) + (G[4] * 5)) >> 3;
R3 = (((R[2] + R[4]) << 2) - (G[1] + G[3] + G[4] + G[9] + G[10] + G[11]) + ((G[6] + G[8]) >> 1) + (G[7] * 5)) >> 3;
G3 = G[7];
B3 = (((B[2] + B[3]) << 2) - (G[3] + G[4] + G[6] + G[8] + G[9] + G[10]) + ((G[1] + G[11]) >> 1) + (G[7] * 5)) >> 3;
R4 = ((((R[2] + R[3] + R[4] + R[5]) << 2) - ((B[1] + B[2] + B[4] + B[5]) * 3) + (B[3] * 12)) >> 1) >> 3;
G4 = ((B[3] << 2) - (B[1] + B[2] + B[4] + B[5]) + ((G[4] + G[7] + G[8] + G[10]) << 1)) >> 3;
B4 = B[3];
outR1 = (unsigned char)(saturate12bits(R1) >> 4);
outR2 = (unsigned char)(saturate12bits(R2) >> 4);
outR3 = (unsigned char)(saturate12bits(R3) >> 4);
outR4 = (unsigned char)(saturate12bits(R4) >> 4);
outG1 = (unsigned char)(saturate12bits(G1) >> 4);
outG2 = (unsigned char)(saturate12bits(G2) >> 4);
outG3 = (unsigned char)(saturate12bits(G3) >> 4);
outG4 = (unsigned char)(saturate12bits(G4) >> 4);
outB1 = (unsigned char)(saturate12bits(B1) >> 4);
outB2 = (unsigned char)(saturate12bits(B2) >> 4);
outB3 = (unsigned char)(saturate12bits(B3) >> 4);
outB4 = (unsigned char)(saturate12bits(B4) >> 4);
img_data[outIndex] = outB1;
img_data[outIndex + 1] = outG1;
img_data[outIndex + 2] = outR1;
img_data[outIndex + 3] = outB2;
img_data[outIndex + 4] = outG2;
img_data[outIndex + 5] = outR2;
img_data[outIndex + w3] = outB3;
img_data[outIndex + w3 + 1] = outG3;
img_data[outIndex + w3 + 2] = outR3;
img_data[outIndex + w3 + 3] = outB4;
img_data[outIndex + w3 + 4] = outG4;
img_data[outIndex + w3 + 5] = outR4;
////对第一个像素插值（R）
//outR1 = (unsigned char)(R[2] >> 4);
//outG1 = (unsigned char)((((R[2] << 2) - (R[0] + R[1] + R[3] + R[4]) + ((G[1] + G[3] + G[4] + G[7]) << 1)) >> 3) >> 4);
//outB1 = (unsigned char)(((((R[2] * 12) - ((R[0] + R[1] + R[3] + R[4]) * 3) + ((B[0] + B[1] + B[2] + B[3]) << 2)) >> 1) >> 3) >> 4);
////对第二个像素插值（G）
//outR2 = (unsigned char)(((((R[2] + R[3]) << 2) - (G[1] + G[2] + G[3] + G[5] + G[7] + G[8]) + ((G[0] + G[10]) >> 1) + (G[4] * 5)) >> 3) >> 4);
//outG2 = (unsigned char)(G[4] >> 4);
//outB2 = (unsigned char)(((((B[1] + B[3]) << 2) - (G[0] + G[1] + G[2] + G[7] + G[8] + G[10]) + ((G[3] + G[5]) >> 1) + (G[4] * 5)) >> 3) >> 4);
////对第三个像素插值（G）
//outR3 = (unsigned char)(((((R[2] + R[4]) << 2) - (G[1] + G[3] + G[4] + G[9] + G[10] + G[11]) + ((G[6] + G[8]) >> 1) + (G[7] * 5)) >> 3) >> 4);
//outG3 = (unsigned char)(G[7] >> 4);
//outB3 = (unsigned char)(((((B[2] + B[3]) << 2) - (G[3] + G[4] + G[6] + G[8] + G[9] + G[10]) + ((G[1] + G[11]) >> 1) + (G[7] * 5)) >> 3) >> 4);
////对第四个像素插值（B）
//outR4 = (unsigned char)((((((R[2] + R[3] + R[4] + R[5]) << 2) - ((B[1] + B[2] + B[4] + B[5]) * 3) + (B[3] * 12)) >> 1) >> 3) >> 4);
//outG4 = (unsigned char)((((B[3] << 2) - (B[1] + B[2] + B[4] + B[5]) + ((G[4] + G[7] + G[8] + G[10]) << 1)) >> 3) >> 4);
//outB4 = (unsigned char)(B[3] >> 4);
//img_data[outIndex] = saturate(outB1);
//img_data[outIndex + 1] = saturate(outG1);
//img_data[outIndex + 2] = saturate(outR1);
//img_data[outIndex + 3] = saturate(outB2);
//img_data[outIndex + 4] = saturate(outG2);
//img_data[outIndex + 5] = saturate(outR2);
//img_data[outIndex + w3] = saturate(outB3);
//img_data[outIndex + w3 + 1] = saturate(outG3);
//img_data[outIndex + w3 + 2] = saturate(outR3);
//img_data[outIndex + w3 + 3] = saturate(outB4);
//img_data[outIndex + w3 + 4] = saturate(outG4);
//img_data[outIndex + w3 + 5] = saturate(outR4);
}
}
}
inline int saturate(int value)
{
if (value < 0)
return 0;
else if (value > 255)
return 255;
else
return value;
}
void AWB(int w, int h, unsigned char* in_img, unsigned char* out_img)
{
unsigned long long sumB = 0, sumG = 0, sumR = 0;
int size = w * h;
for (int i = 0; i < size; i++)
{
sumB += in_img[i * 3];
sumG += in_img[i * 3 + 1];
sumR += in_img[i * 3 + 2];
}
unsigned long avgB = sumB / size;
unsigned long avgG = sumG / size;
unsigned long avgR = sumR / size;
double gainR = (double)avgG / avgR;
double gainB = (double)avgG / avgB;
for (int i = 0; i < size; i++)
{
/*int B = in_img[i * 3] * gainB;
int G = in_img[i * 3 + 1];
int R = in_img[i * 3 + 2] * gainR;*/
int B = in_img[i * 3] * 1.9503;
int G = in_img[i * 3 + 1];
int R = in_img[i * 3 + 2] * 1.6973;
out_img[i * 3] = (unsigned char)saturate(B);
out_img[i * 3 + 1] = (unsigned char)saturate(G);
out_img[i * 3 + 2] = (unsigned char)saturate(R);
}
}