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PO8Bit Grayscale Bitmap to Array
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copied!<p>I am wondering, from here how would I go about storing the pixel values into a matrix? I would like to print out the intensity (grayscale) value.</p> <p>Example Array[5] = 4 Or Array[3][1] = 17</p> <p>I really have no idea how to go about this. All the examples I see seem way to complicated, is there a simple way to do this?</p> <pre><code>#include <stdio.h> #include <stdlib.h> #include <string.h> struct BitMap { short Type; long Size; short Reserve1; short Reserve2; long OffBits; long biSize; long biWidth; long biHeight; short biPlanes; short biBitCount; long biCompression; long biSizeImage; long biXPelsPerMeter; long biYPelsPerMeter; long biClrUsed; long biClrImportant; }Header; int main( void ){ FILE *BMPFile = fopen ("MriHotrod.bmp", "rb"); if(BMPFile == NULL){ return; } unsigned char DataBuff[128*128]; int i; int j; memset(&Header, 0, sizeof(Header)); fread(&Header.Type, 2, 1, BMPFile); fread(&Header.Size, 4, 1, BMPFile); fread(&Header.Reserve1, 2, 1, BMPFile); fread(&Header.Reserve2, 2, 1, BMPFile); fread(&Header.OffBits, 4, 1, BMPFile); fread(&Header.biSize, 4, 1, BMPFile); fread(&Header.biWidth, 4, 1, BMPFile); fread(&Header.biHeight, 4, 1, BMPFile); fread(&Header.biPlanes, 2, 1, BMPFile); fread(&Header.biBitCount, 2, 1, BMPFile); fread(&Header.biCompression, 4, 1, BMPFile); fread(&Header.biSizeImage, 4, 1, BMPFile); fread(&Header.biXPelsPerMeter, 4, 1, BMPFile); fread(&Header.biYPelsPerMeter, 4, 1, BMPFile); fread(&Header.biClrUsed, 4, 1, BMPFile); fread(&Header.biClrImportant, 4, 1, BMPFile); printf("\nType:%hd\n", Header.Type); printf("Size:%ld\n", Header.Size); printf("Reserve1:%hd\n", Header.Reserve1); printf("Reserve2:%hd\n", Header.Reserve2); printf("OffBits:%ld\n", Header.OffBits); printf("biSize:%ld\n", Header.biSize); printf("Width:%ld\n", Header.biWidth); printf("Height:%ld\n", Header.biHeight); printf("biPlanes:%hd\n", Header.biPlanes); printf("biBitCount:%hd\n", Header.biBitCount); printf("biCompression:%ld\n", Header.biCompression); printf("biSizeImage:%ld\n", Header.biSizeImage); printf("biXPelsPerMeter:%ld\n", Header.biXPelsPerMeter); printf("biYPelsPerMeter:%ld\n", Header.biYPelsPerMeter); printf("biClrUsed:%ld\n", Header.biClrUsed); printf("biClrImportant:%ld\n\n", Header.biClrImportant); fread(DataBuff, sizeof(DataBuff), 128*128, BMPFile); for(i=0; i<20; i++){ printf("%d\n", DataBuff[i]); } fclose(BMPFile); return 0; } Output Type:19778 Size:17462 Reserve1:0 Reserve2:0 OffBits:1078 biSize:40 Width:128 Height:128 biPlanes:1 biBitCount:8 biCompression:0 biSizeImage:0 biXPelsPerMeter:0 biYPelsPerMeter:0 biClrUsed:256 biClrImportant:0 0 0 0 0 1 1 1 0 2 2 2 0 3 3 3 0 4 4 4 0 </code></pre> <p>I think the header info is correct, and the number of elements is correct (16384). I am just unsure how to print out the pixel values. The above is clearly not right...</p> <p>Does this have to do with padding?</p> <p>Thanks!</p>

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