[sane-devel] backend Kodak i260 Image depth 48 bits stream. How is coded?

[Jose Guadalupe Osuna Chavez]

Hi:

 

    I'm making a backend for a i260 kodak scanner on Linux, but now I'm stuck trying to decode the image's stream.

 

    As a result of analyzing the driver's log on window, all appears to show that the scanner only works with depth of 48 bits per pixel. Every time that I'd send a SetWindow command with another pixel depth, an error occurs.

 

    The SetWindow command on window's log is the next:

 

01904 104543281 kdsprot                   7703   183 S5 CMD : SetWindow

01905 104543281 kdsprot                   7711   183 S5 DMP : aWindowDescLength:                 0

01906 104543281 kdsprot                   7712   183 S5 DMP : aWindowDataLength:                 46

01907 104543281 kdsprot                   7713   183 S5 DMP : aWindowId:                         3

01908 104543281 kdsprot                   7714   183 S5 DMP : aX_resolution:                     200

01909 104543281 kdsprot                   7715   183 S5 DMP : aY_resolution:                     200

01910 104543281 kdsprot                   7716   183 S5 DMP : aUpperLeft_X:                      0

01911 104543281 kdsprot                   7717   183 S5 DMP : aUpperLeft_Y:                      0

01912 104543281 kdsprot                   7718   183 S5 DMP : aWidth:                            14400

01913 104543281 kdsprot                   7719   183 S5 DMP : aLength:                           20400

01914 104543281 kdsprot                   7720   183 S5 DMP : aBrightness:                       0

01915 104543281 kdsprot                   7721   183 S5 DMP : aThreshold:                        0

01916 104543281 kdsprot                   7722   183 S5 DMP : aContrast:                         0

01917 104543281 kdsprot                   7723   183 S5 DMP : aImageComposition:                 5

01918 104543281 kdsprot                   7724   183 S5 DMP : aBitsPerPixel:                     48

01919 104543281 kdsprot                   7725   183 S5 DMP : aHalftonePattern:                  0

01920 104543281 kdsprot                   7726   183 S5 DMP : aPaddingType:                      0

01921 104543281 kdsprot                   7727   183 S5 DMP : aRif:                              0

01922 104543281 kdsprot                   7728   183 S5 DMP : aBitOrdering:                      1

01923 104543281 kdsprot                   7729   183 S5 DMP : aCompressionType:                  0

01924 104543281 kdsprot                   7730   183 S5 DMP : aCompressionArgument:              0

01925 104543281 kdsprot                   7731   183 S5 DMP : aImageOverscan:                    0

01926 104543281 kdsprot                   7732   183 S5 DMP : aColorDropoutColor:                0

01927 104543281 kdsprot                   7733   183 S5 DMP : aColorDropoutBackground:           245

01928 104543281 kdsprot                   7734   183 S5 DMP : aColorDropoutThreshold:            175

01929 104543281 kdsprot                   7735   183 S5 DMP : aImageMagnificationFactor:         10

01930 104543281 kdsprot                   1108   183 S5 >>> KDSPROT::Escape(0x2a24,10891898,54,0)

01931 104543281 wr_cwirebase              2307   183 S5 ARG : command/2a 24 buffer/0x10891898 buflen/54 direction/0x0 mode:1

01932 104543281 wr_cwirebase              2314   183 S5 SRB : flags/0x00 cdblen/10

 

01933 104543281 wr_cwirebase              2374   183 S5 CDB : 24 00 00 00 00 00 00 00 36 00

 

01934 104543281 wr_cwirebase              2437   183 S5 PUT : 

00 00 00 00 00 00 00 2e 03 00 00 c8 00 c8 00 00

00 00 00 00 00 00 00 00 38 40 00 00 4f b0 00 00 

00 05 30 00 00 00 00 01 00 00 00 00 00 00 00 00 

00 00 00 f5 af 0a

 

 

     The scanner works fine, but after the ReadImage command I don't understand the data stream of 48 bits. I'll like to convert this image to 8 bits grayscale and Bitonal after.

 

      Does anybody have any information about this image stream?   Thank you 

 

      The stream show two bytes with 80 80 every four, just like this on linux.

 

[kodak] sane_read: start

[kodak] read_from_scanner: start

[kodak] read_from_scanner: to:7920000 rx:0 re:7920000 bu:32766 pa:32766

[kodak] do_cmd: start

[kodak] cmd: writing 10 bytes

[kodak] cmd: >>

[kodak] 000: 28 00 00 00 00 00 00 7f fe 00                      /* ReadImage command */

[kodak] in: reading 32766 bytes

[kodak] in: <<

[kodak] 000: 09 09 80 80 0b 0a 80 80 07 07 80 80 08 09 80 80    /* Image stream */

[kodak] 010: 09 09 80 80 0a 0b 80 80 0a 09 80 80 09 09 80 80

[kodak] 020: 0b 0a 80 80 08 09 80 80 0b 0c 80 80 0a 09 80 80

[kodak] 030: 0b 0a 80 80 09 0a 80 80 0b 0b 80 80 0b 09 80 80

[kodak] 040: 08 07 80 80 08 0a 80 80 0c 0b 80 80 09 08 80 80

[kodak] 050: 08 07 80 80 0a 0b 80 80 0b 0b 80 80 09 09 80 80

[kodak] 060: 0b 0a 80 80 09 08 80 80 09 09 80 80 0a 0b 80 80 

......

 

Jose Osuna

Coordinación Técnica

CRDC Cd. Obregon

Vangent de Mexico, S.A. de C.V. 

 

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