c# - raw pixel array to gray scale BitmapImage -

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i have array of raw pixel data. convert 8bpp bitmap.

public static bitmap bytetograybitmap(byte[] rawbytes, int width, int height)  {      bitmap bitmap = new bitmap(width, height, pixelformat.format8bppindexed);     bitmapdata  bitmapdata = bitmap.lockbits(new rectangle(0, 0, width, height),                                     imagelockmode.writeonly, bitmap.pixelformat);      marshal.copy(rawbytes, 0, bitmapdata .scan0, rawbytes.length);     bitmap.unlockbits(bitmapdata);      return bitmap; }

bitmap looks color image instead of grayscale.

try adding before return bitmap:

for (int c = 0; c < bitmap.palette.entries.length; c++)     bitmap.palette.entries[c] = color.fromargb(c, c, c);

it create typical grayscale palette.


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