Bayer图像转RGB

最新推荐文章于 2025-05-20 09:00:04 发布

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最新推荐文章于 2025-05-20 09:00:04 发布 · 6.2k 阅读

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#Bayer #白平衡

Bayer图像不做赘述

一、Bayer(GRBG)图像转RGB

处理方法：对于某个像素点，存在的分量值不变化，缺少的两个分量值使用Correlation-Adjusted算法

QImage CorrelationAdjusted(QImage srcImg, int type)
{
	int imgW = srcImg.width();
	int imgH = srcImg.height();

	// 	if (srcImg.format() != QImage::Format_Grayscale8)
	// 		return srcImg;

	if (type == 0)
		return srcImg;

	QImage dstImg(imgW, imgH, QImage::Format_Grayscale8);
	QImage colImg(imgW, imgH, QImage::Format_RGB888);

	uchar *srcImgData;// = srcImg.bits();
	uchar *dstImgData;// = dstImg.bits();
	uchar *colImgData;// = colImg.bits();

	uchar r, g, b, temVal;

	for (int i = 0; i < imgH; i++)
	{
		
		dstImgData = dstImg.scanLine(i);
		colImgData = colImg.scanLine(i);
		srcImgData = srcImg.scanLine(i);
		
		//判断边缘两行
		if (i < 2 || i >= imgH - 2)
		{
			int Raver, Rtot, Gaver, Gtot, Baver, Btot;
			for (int j = 0; j < imgW; j++)
			{
				Raver = Rtot = Gaver = Gtot = Baver = Btot = 0;
				if (i % 2 == j % 2)
				{
					if (i > 0)
					{
						if (i % 2) Raver += srcImg.scanLine(i - 1)[j], Rtot++;
						else Baver += srcImg.scanLine(i - 1)[j], Btot++;
					}
					if (i < imgH - 1)
					{
						if (i % 2) Raver += srcImg.scanLine(i + 1)[j], Rtot++;
						else Baver += srcImg.scanLine(i + 1)[j], Btot++;
					}
					if (j > 0)
					{
						if (i % 2) Baver += srcImgData[j - 1], Btot++;
						else Raver += srcImgData[j - 1], Rtot++;
					}
					if (j < imgW - 1)
					{
						if (i % 2) Baver += srcImgData[j + 1], Btot++;
						else Raver += srcImgData[j + 1], Rtot++;
					}
					Gaver = srcImgData[j], Gtot = 1;
				}
				else
				{
					if (i > 0) Gaver += srcImg.scanLine(i - 1)[j], Gtot++;
					if (i < imgH - 1) Gaver += srcImg.scanLine(i + 1)[j], Gtot++;
					if (j > 0) Gaver += srcImgData[j - 1], Gtot++;
					if (j < imgW - 1) Gaver += srcImgData[j + 1], Gtot++;
					
					int Naver = 0, Ntot = 0;
					if (i > 0)
					{
						if (j > 0) Naver += srcImg.scanLine(i - 1)[j - 1], Ntot++;
						if (j < imgW - 1) Naver += srcImg.scanLine(i - 1)[j + 1], Ntot++;
					}
					if (i < imgH - 1)
					{
						if (j > 0) Naver += srcImg.scanLine(i + 1)[j - 1], Ntot++;
						if (j < imgW - 1) Naver += srcImg.scanLine(i + 1)[j + 1], Ntot++;
					}
					if (i % 2)
					{
						Baver = srcImgData[j], Btot = 1;
						Raver = Naver, Rtot = Ntot;
					}
					else
					{
						Raver = srcImgData[j], Rtot = 1;
						Baver = Naver, Btot = Ntot;
					}
				}
				colImgData[j * 3] = Raver / Rtot;
				colImgData[j * 3 + 1] = Gaver / Gtot;
				colImgData[