分离RGB24像素数据中的R、G、B分量
parent
a571e3a1e4
commit
666067a3b6
35
README.md
35
README.md
|
@ -140,5 +140,40 @@ yuv420_split.cpp 程序中的函数可以将YUV420P数据中的Y、U、V三个
|
||||||
<br />
|
<br />
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
## 分离RGB24像素数据中的R、G、B分量
|
||||||
|
> 说明:与YUV420P三个分量分开存储不同,RGB24格式的每个像素的三个分量是连续存储的。一帧宽高分别为w、h的RGB24图像一共占用w * h * 3 Byte的存储空间。RGB24格式规定首先存储第一个像素的R、G、B,然后存储第二个像素的R、G、B…以此类推。类似于YUV420P的存储方式称为Planar方式,而类似于RGB24的存储方式称为Packed方式。
|
||||||
|
|
||||||
|
调用方法:
|
||||||
|
> ./rgb24_split ./mediadata/cie1931_500x500.rgb 500 500
|
||||||
|
|
||||||
|
上述代码运行后,将会把一张分辨率为500x500的名称为cie1931_500x500.rgb的RGB24格式的像素数据文件分离成为三个文件:
|
||||||
|
|
||||||
|
- output_r.y:R数据,分辨率为**500x500**。
|
||||||
|
- output_g.y:G数据,分辨率为**500x500**。
|
||||||
|
- output_b.y:B数据,分辨率为**500x500**。
|
||||||
|
|
||||||
|
输入的原图是一张标准的CIE 1931色度图。该色度图右下为红色,上方为绿色,左下为蓝色,如下图所示:
|
||||||
|
|
||||||
|
![](./images/cie1931_500x500.png)
|
||||||
|
|
||||||
|
R数据图像如图所示: ![](./images/cie1931_500x500_r.png)
|
||||||
|
|
||||||
|
G数据图像如图所示: ![](./images/cie1931_500x500_g.png)
|
||||||
|
|
||||||
|
B数据图像如图所示: ![](./images/cie1931_500x500_b.png)
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
<br />
|
||||||
|
<br />
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
参考:[视音频数据处理入门:RGB、YUV像素数据处理](http://blog.csdn.net/leixiaohua1020/article/details/50534150)
|
参考:[视音频数据处理入门:RGB、YUV像素数据处理](http://blog.csdn.net/leixiaohua1020/article/details/50534150)
|
||||||
![](./images/leixiaohua_avDataProcess.png)
|
![](./images/leixiaohua_avDataProcess.png)
|
||||||
|
|
Binary file not shown.
After Width: | Height: | Size: 181 KiB |
Binary file not shown.
After Width: | Height: | Size: 89 KiB |
Binary file not shown.
After Width: | Height: | Size: 74 KiB |
Binary file not shown.
After Width: | Height: | Size: 78 KiB |
File diff suppressed because one or more lines are too long
|
@ -0,0 +1,47 @@
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
typedef int BOOL;
|
||||||
|
#define TRUE 1
|
||||||
|
#define FALSE 0
|
||||||
|
|
||||||
|
BOOL rgb24_split(const char *file, int width, int height)
|
||||||
|
{
|
||||||
|
if (file == NULL) {
|
||||||
|
return FALSE;
|
||||||
|
}
|
||||||
|
|
||||||
|
FILE *fp = fopen(file, "rb+");
|
||||||
|
FILE *fp_r = fopen("./out/output_rgb24_r.y", "wb+");
|
||||||
|
FILE *fp_g = fopen("./out/output_rgb24_g.y", "wb+");
|
||||||
|
FILE *fp_b = fopen("./out/output_rgb24_b.y", "wb+");
|
||||||
|
|
||||||
|
unsigned char *data = (unsigned char *)malloc(width*height*3);
|
||||||
|
memset(data, 0, width*height*3);
|
||||||
|
|
||||||
|
fread(data, 1, width*height*3, fp);
|
||||||
|
|
||||||
|
for(int i=0; i<width*height*3; i=i+3) {
|
||||||
|
fwrite(data+i+0, 1, 1, fp_r);
|
||||||
|
fwrite(data+i+1, 1, 1, fp_g);
|
||||||
|
fwrite(data+i+2, 1, 1, fp_b);
|
||||||
|
}
|
||||||
|
|
||||||
|
free(data);
|
||||||
|
fclose(fp);
|
||||||
|
fclose(fp_r);
|
||||||
|
fclose(fp_g);
|
||||||
|
fclose(fp_b);
|
||||||
|
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(int argc, char *argv[])
|
||||||
|
{
|
||||||
|
if (argc == 4) {
|
||||||
|
rgb24_split(argv[1], atoi(argv[2]), atoi(argv[3]));
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
Loading…
Reference in New Issue