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February 2004
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2004.02.09 09:00 "Re: displaying 12 bit tiff image", by Andrey Kiselev
On Fri, Feb 06, 2004 at 03:35:36PM -0600, Liliana RESENDIZ wrote: > I'm BCB6 user, I've reading the documentation in order to display > correctly a 12-bit image What is 12-bit image? Is it just 16-bit TIFF where the actual dynamic range of the values limited by 12 bit? > TIFF* tif = TIFFOpen(FileName, "rl"); You don't need "l" flag unless your intention is to _write_ the little-endian TIFF file. > with the TIFFReadRGBAImageOriented(tif, w, h, raster)) function, and i > tried to display it on a TImage but it handles data range [0,256], but > doing pixel_val = (uint16) *raster++, Completely wrong. The image data in the 'raster' array represented as 8-bit packed ABGR pixels. TIFFReadRGBAImage() already did all type transformation work for you and if you need individual pixels you should use macros TIFFGetR/G/B/A. I think that your TImage component wants ABGR array on input, so you should just use 'raster' array as it comes from TIFFReadRGBAImage() with TImage. Best regards, Andrey -- Andrey V. Kiselev Home phone: +7 812 5274898 ICQ# 26871517