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June 2011
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2011.06.24 20:40 "16-bit image", by Leandro Bugnon
Hi, I'm getting a 14bit image from a CCD cam, and save it in a 16bit. The problem is that, if I take only 2 gray values (greater than zero and less than 2^14), the viewers that I try (imageJ and irfanview) take them as zero and max valuo (black and white), they don't show the real color. How can I fix it? I've tryed the next tags: TIFFSetField(TiffFileWriter,TIFFTAG_IMAGEWIDTH, w); TIFFSetField(TiffFileWriter,TIFFTAG_IMAGELENGTH, h); TIFFSetField(TiffFileWriter,TIFFTAG_BITSPERSAMPLE, 16); TIFFSetField(TiffFileWriter,TIFFTAG_COMPRESSION, COMPRESSION_NONE); TIFFSetField(TiffFileWriter,TIFFTAG_FILLORDER,FILLORDER_MSB2LSB); TIFFSetField(TiffFileWriter,TIFFTAG_PLANARCONFIG,PLANARCONFIG_CONTIG); TIFFSetField(TiffFileWriter,TIFFTAG_ORIENTATION,ORIENTATION_TOPLEFT); TIFFSetField(TiffFileWriter,TIFFTAG_SAMPLESPERPIXEL, 1); TIFFSetField(TiffFileWriter,TIFFTAG_ROWSPERSTRIP,h); TIFFSetField(TiffFileWriter,TIFFTAG_XRESOLUTION,Xres); TIFFSetField(TiffFileWriter,TIFFTAG_YRESOLUTION,Yres); TIFFSetField(TiffFileWriter,TIFFTAG_RESOLUTIONUNIT,RESUNIT_CENTIMETER); TIFFSetField(TiffFileWriter,TIFFTAG_MINSAMPLEVALUE,min); TIFFSetField(TiffFileWriter,TIFFTAG_MAXSAMPLEVALUE,max); TIFFSetField(TiffFileWriter,TIFFTAG_SMINSAMPLEVALUE,min); TIFFSetField(TiffFileWriter,TIFFTAG_SMAXSAMPLEVALUE,max); TIFFSetField(TiffFileWriter,TIFFTAG_PHOTOMETRIC,1); The values are correctly saved, but it always show a full black and full white value when there isn't any zero or 2^16 value. Thanks for help, Greetings -- Leandro