Hi, sorry for my poor english. I'm appending the AV220D2 + scanner to backend as follows:
{ NULL, NULL, 0x0638, 0x1A31, "Avision", "AV220D2+", AV_INT_BUTTON | AV_CANCEL_BUTTON ,AV_USE_GRAY_FILTER|AV_FIRMWARE}, But in lineart mode, the resulting image is all black. If I set 512 as size for the gamma table (gamma_table_raw_size = gamma_table_size = 512, in SANE_Status send_gamma (Avision_Scanner * s)). In addition, there is a problem in obtaining SANE_STATUS_EOF in the reader_process method. In the following cases: 1 - read rear line: only emit a eof status. The following status returned is SANE_STATUS_OK, with data of the following page (see image1). 2 - read front lines: In this case emit a eof status per side of the page. In last read, when the scanner returns an eof status, a striped band is obtained at the bottom if you scan in lineart mode(see Image2), or gray stripe , if set color or gray mode. The scanner has the following characteristics: - [avision] attach: [91] ASIC 8 - Bits per channel: 1, 8, 16 Environment: Sane-backends: 1.0.25 OS : Open Suse 12.1 The images were obtained using xsane I await your response. Best Regards! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20140129/ef1ee42d/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: Image1.tiff Type: image/tiff Size: 71570 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20140129/ef1ee42d/attachment-0001.tiff>