>>>>> "АП" == Алексей Прокопчук <[email protected]> writes:
АП> The scanner gives the data of the fingerprint by eight blocks of АП> 61440 bytes in each. Manufacturer's web site indicated that image АП> resolution is 192 x 8 pixels @ 508 dpi, 16 gray levels / sensor АП> pixel (4-bit ADC). Unfortunately, I'm totally not familiar with the АП> image processing algorithms. I tried to write the obtained data as АП> the PGM image, but this format only supports 8 bits per pixel, hence АП> 61440 bytes - it is exactly an image 192 x 320. You might try outputting ascii pgm files; use P2 instead of P5 as the header line, then a line with the width and height output in %d printf(3) format, then a line with the maximum value (15 for a 4-bit int) and then a whitespace-separated list of the 4-bit values in %d format. Eg, something like: P2 6 4 15 0 0 0 0 0 7 0 13 0 4 0 0 0 0 12 0 3 0 8 0 0 11 1 0 At 192 x 8 x 4 bits per stripe you should get 80 stripes out of a 61440 octet blob. АП> If I give a link to a sample of the data, obtained from reader, can АП> you help me deal with what to do with this data? I wouldn't mind trying it out. -JimC -- James Cloos <[email protected]> OpenPGP: 1024D/ED7DAEA6 _______________________________________________ fprint mailing list [email protected] http://lists.reactivated.net/mailman/listinfo/fprint
