获取矩阵中BMP图像的RGB值 [英] get RGB value of BMP image in matrix

问题描述

我想要.bmp图像的RGB值，并且这些值以矩阵形式存储。我尝试了一些，但没有得到矩阵形式....请帮助我

I want RGB values of .bmp image and that values are store in matrix form. I have tried somewhat but didnt get in matrix form....please help me

void main()
{
 int i;
 int image[256][3];
 FILE *streamIn,*streamOut;
 streamIn = fopen("C:\G.bmp", "r");
 streamOut = fopen("C:\g.txt", "w");


 for(i=0;i<256;i++)
 {    // foreach pixel
    image[i][2] = getc(streamIn);
    image[i][1] = getc(streamIn);
    image[i][0] = getc(streamIn);
    printf("pixel %d : [%d,%d,%d]\n",i+1,image[i][1],image[i][2],image[i][0]);
    fprintf(streamOut,"pixel %d : [Red : %d Green :%d Blue : %d]\n",i+1,image[i] [1],image[i][2],image[i][0]);
 }


 fclose(streamIn);
 getch();
}

推荐答案

好吧，BITMAP文件格式比程序假设的要复杂一些。

看看，例如在位图教程：加载和保存位图 [ ^ ]

Well, the BITMAP file format is bit more complex than the one your program suppose.
Have a look, for instance at "Bitmap Tutorial: Loading and Saving Bitmaps"[^]

1。你在每个BMP文件的开头都忽略了BITMAPFILEHEADER和BITMAPINFOHEADER

。



2.你假设你有一个未压缩的24位BGR三元组档案

- >检查一下！ （bmpinfo.biCompression和bmpinfo.biBitCount）



3.你真的想读（仅）前256个像素吗？



4.你必须计算数据的开始（bmpheader.bfOffBits）



5.你必须支持DWORD对齐扫描线



你可以在CPallini发布的解决方案中找到所有这些

1. You ignore the BITMAPFILEHEADER and BITMAPINFOHEADER at the beginning
of every BMP-File.

2. You assume you have an uncompressed 24bit BGR triplet File
-> check that! ( bmpinfo.biCompression and bmpinfo.biBitCount )

3. You really want to read (only) the first 256 Pixels ?

4. You have to calculate the start of data ( bmpheader.bfOffBits )

5. You have to support DWORD aligned scanline

You can find all this in the Solution CPallini posted

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