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June 2009
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2009.06.14 16:50 "Re: Tiff 16 bit and 32 bit images", by Kai-uwe Behrmann
Am 14.06.09, 06:24 -0700 schrieb Keshab Neupane: > For this, I need to handle all types of images. I am having trouble with > tiff 16 bits signed/unsigned integer and 32 bit float images. Does this > 16/32 bit means they are colored images or they can be greyscale too ? Yes, colour, grayscale or whatever is independent from the data type. > I am using TIFFReadScanline to read the datas, but the problem is my > buffer(this is constraint) is char* and how can I access this data if they > are 16/32 bit ? You can simply cast to the according type. uint16_t * my_16bit_per_sample_buffer = (uint16_t*) my_char_buffer; > And also, how does this data relate to bpp,bps and spp ? bpp - bit per pixel bps - bit per sample spp - samples per pixel A 16-bit RGBA image has: 64 bpp 16 bps 4 spp hope this helps, Kai-Uwe Behrmann -- developing for colour management www.behrmann.name + www.oyranos.org