YUV 4：2：0（IMC3）图像处理 [英] YUV 4:2:0 (IMC3)image processing

问题描述

亲爱的先生，



我有一个图像处理代码，我需要改变颜色，如饱和度，亮度或其他东西。所以你能告诉我在哪里我可以更改代码以及我需要更改代码的内容。



谢谢。



< pre lang =C ++> #include < < span class =code-leadattribute> stdio.h >
#include < stdlib.h < span class =code-keyword>>
#define WIDTH 176
#define HEIGHT 144

void NearestNeighbor（ unsigned char * in ， unsigned char * out， unsigned int width， unsigned int height）;
void 处理（ unsigned char ， unsigned char * out ， unsigned int width， unsigned int height）;

unsigned char * yIn，* cbIn，* crIn;
unsigned char * yOut，* cbOut，* crOut;

int main（ void ）
{
FILE * fin，* fout;
unsigned char * inbuf，* outbuf;
unsigned int NoOfFrames，filesize，frame，Framesize;

if （（fin = fopen（ C：\\miss-america_qcif.yuv， rb））== NULL）{
printf（ 错误：打开YUV文件... \ N）;
返回 - 1 ;
}
if （（fout = fopen（ Output.yuv， wb））== NULL ）{
printf（ 错误：打开输出YUV文件... \ n ）;
返回 - 1 ;
}

Framesize =（WIDTH * HEIGHT）*（ 3 / 2 < /跨度>）;
inbuf =（ unsigned char *）malloc（的sizeof （框架尺寸））;
outbuf =（ unsigned char *）malloc（ sizeof （（ 2 * WIDTH）*（ 2 * HEIGHT）* 3 / 2 ））;

if （inbuf == NULL）{
printf（ 错误：输入缓冲区的内存分配。\ n）;
返回 - 1 ;
}
if （outbuf == NULL）{
printf（ 错误：输出缓冲区的内存分配。\ n）;
返回 - 1 ;
}

yIn = inbuf;
cbIn = yIn +（WIDTH * HEIGHT）;
crIn = cbIn +（（WIDTH>> 1 ）*（HEIGHT>> 1 < /跨度>））;

yOut = outbuf;
cbOut = yOut + WIDTH * HEIGHT * 4 ;
crOut = cbOut + WIDTH * HEIGHT;

// 查找帧数
fseek（fin ， 0 ，SEEK_END）;
filesize = ftell（fin）;
printf（ filesize数量=％d \ n，filesize）;
倒带（fin）;
NoOfFrames = filesize / Framesize;
printf（ 帧数=％d \ n，NoOfFrames）;


/ * ************ ************************************************** *********
*阅读一帧&高档框架*
*对文件中的所有帧重复上述过程*
************************* *************** /
for （frame = 0 ; frame< NoOfFrames; frame ++）{
fread（inbuf， sizeof （ unsigned char ），Framesize，fin）;
NearestNeighbor（inbuf，outbuf，（ unsigned int ）WIDTH，（ unsigned int ）HEIGHT）;
fwrite（outbuf， sizeof （ unsigned char ），Framesize * 4 ，fout）;
printf（ 已处理帧％d。\ n，帧）;
}

fclose（fin）;
fclose（fout）;
return 0 ;
}

void NearestNeighbor（ unsigned char * ， unsigned char * out， unsigned int width， unsigned int height）
{
unsigned char * inY，* inCb，* inCr，* outY，* outCb，* outCr;

// 输入和输出的计算输出YCbCr位置
inY = in ;
inCb = inY + WIDTH * HEIGHT;
inCr = inCb +（WIDTH>> 1 ）*（HEIGHT>> 1 ）;
outY = out;
outCb = outY + 4 * WIDTH * HEIGHT;
outCr = outCb + WIDTH * HEIGHT;

// 处理亮度（Y）
流程（ inY，outY，width，height）;
// 处理色度（CbCr）
流程（inCb，outCb， width>> 1 ，height>> 1 ）;
处理（inCr，outCr，宽度>> 1 ，height>> 1 ）;

return ;
}

void 流程（ unsigned char * ， unsigned char * out， unsigned int width， unsigned int height）
{
unsigned int row，col;

for （row = 0 ; row< height; row ++）{
for （col = 0 ; col< width; col ++）{
* out ++ = * in ;
*（out + 2 * width）= * in ;
*（out + 2 * width - 1 ）= * 中;
* out ++ = * in ++;
}
out + = 2 * width;
}

return ;
}

我的尝试：



我只显示未完成的图像处理

解决方案

嗨吉里，

它不是由我而是我理解代码。问你们有人改变图像的颜色，就像CCSv6.2使用DSP KIT DM6437而不是问你的决定。

谢谢你。

Dear sir,

I have a code for image processing,i need to change COLOR like saturation,brightness,or something else.so can you tell me where i can change the code and what i need to change my code.

thank you.

#include<stdio.h>
#include<stdlib.h>
#define WIDTH	176
#define HEIGHT	144

void NearestNeighbor(unsigned char *in, unsigned char *out, unsigned int width, unsigned int height);
void Process(unsigned char *in, unsigned char *out, unsigned int width, unsigned int height);

unsigned char *yIn, *cbIn, *crIn;
unsigned char *yOut, *cbOut, *crOut;

int main(void)
{
	FILE *fin, *fout;
	unsigned char *inbuf, *outbuf;
	unsigned int NoOfFrames, filesize, frame, Framesize;

	if ((fin = fopen("C:\\miss-america_qcif.yuv", "rb")) == NULL) {
		printf ("Error: Opening YUV file...\n");
		return -1;
	}
	if ((fout = fopen("Output.yuv", "wb")) == NULL) {
		printf ("Error: Opening output YUV file...\n");
		return -1;
	}

	Framesize =( WIDTH * HEIGHT) * (3 / 2);
	inbuf = (unsigned char*) malloc(sizeof(Framesize));
	outbuf = (unsigned char*) malloc(sizeof((2 * WIDTH) * (2 * HEIGHT) * 3 / 2));

	if (inbuf == NULL) {
		printf ("Error: Memory allocation of Input buffer.\n");
		return -1;
	}
	if (outbuf == NULL) {
		printf ("Error: Memory allocation of Output buffer.\n");
		return -1;
	}

	yIn = inbuf;
	cbIn = yIn + (WIDTH * HEIGHT);
	crIn = cbIn + ((WIDTH >> 1) * (HEIGHT >> 1));

	yOut = outbuf;
	cbOut = yOut + WIDTH * HEIGHT * 4;
	crOut = cbOut + WIDTH * HEIGHT;

	//	Finding the Number of Frames
	fseek(fin, 0, SEEK_END);
	filesize = ftell(fin);
	printf ("Number of filesize = %d\n", filesize);
	rewind(fin);
	NoOfFrames = filesize / Framesize;
	printf ("Number of Frames = %d\n", NoOfFrames);


	/************************************************************************
	 * Read one frame & upscale the frame									*
	 * Repeat the above process for all the frames in the file				*
	 ************************************************************************/
	for (frame = 0; frame < NoOfFrames; frame++) {
		fread(inbuf, sizeof(unsigned char), Framesize, fin);
		NearestNeighbor(inbuf, outbuf, (unsigned int) WIDTH, (unsigned int) HEIGHT);
		fwrite(outbuf, sizeof(unsigned char), Framesize * 4, fout);
		printf ("Processed Frame %d.\n", frame);
	}

	fclose(fin);
	fclose(fout);
	return 0;
}

void NearestNeighbor(unsigned char *in, unsigned char *out, unsigned int width, unsigned int height)
{
	unsigned char *inY, *inCb, *inCr, *outY, *outCb, *outCr;

	// Calculation of Input & Output YCbCr positions
	inY = in;
	inCb = inY + WIDTH * HEIGHT;
	inCr = inCb + (WIDTH >> 1) * (HEIGHT >> 1);
	outY = out;
	outCb = outY + 4 * WIDTH * HEIGHT;
	outCr = outCb + WIDTH * HEIGHT;

	//	Processing the Luminance(Y)
	Process(inY, outY, width, height);
	//	Process the Chrominance(CbCr)
	Process(inCb, outCb, width >> 1, height >> 1);
	Process(inCr, outCr, width >> 1, height >> 1);

	return;
}

void Process(unsigned char *in, unsigned char *out, unsigned int width, unsigned int height)
{
	unsigned int row, col;

	for (row = 0; row < height; row++) {
		for (col = 0; col < width; col++) {
			*out++					= *in;
			*(out + 2 * width)		= *in;
			*(out + 2 * width - 1)	= *in;
			*out++					= *in++;
		}
		out += 2 * width;
	}

	return;
}

What I have tried:

I diplayed only the image not done nay processing

解决方案

Hi Giri,
Its not by me but i understood the code.Am asking to you people to change the color of the image as am CCSv6.2 WITH DSP KIT DM6437 and not asking your decisions.
thank you.

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