How to Invert RGB tiff image into Negative?

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How to convert a RGB Tiff image into its negative image? The original Tiff image stored into an unsigned char type 2-D array f[x][y] in standard ANSI C++ program.

Posted 22-May-15 6:19am

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-05-22T06:56:00

If you already have this array, it means it has nothing to do with TIFF, the data is already unpacked from TIFF, or this is not TIFF at all.

You pixel type must be byte per color component, 3 bytes per pixel. If this is RGB data, the inversion of the pixel value for such pixel type is 255 − value, for each color component. If you also have alpha channel, leave it as is.

But the image representation types can be very different. The final answer depends on what it is. What I described above is the most likely thing.

—SA