scanimage 返回损坏的图像

scanimage 返回损坏的图像

我想使用树莓派(Debian)作为扫描服务器。为了这项工作,我安装了 SANE 和 ImageMagick。

如果我用... Bash 扫描:

scanimage -p --resolution=25 --mode=Color -l 0 -t 0 -x 210mm -y 297mm >test.pnm

...我将得到一个不可读的 pnm 文件。 (https://mega.nz/file/c15GmKKZ#_S7Ygiymoid38F2mv_StgEo_9m_8lgnw133GFNrPRUI

根据标题,我发现该文件比应有的小,我尝试用...修复此问题

dd if=/dev/zero bs=40000 count=1 >> test.pnm

现在我有一个 pnm 文件,我可以使用... Bash 将其转换为图像:

convert test.pnm test.jpg

问题是结果与扫描的文档不匹配。这是和应该之间的区别: 在此输入图像描述

有人知道如何解决这个问题吗?


可能“scanimage -T”的结果也很有趣:

scanimage: scanning image of size 637x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame, 8 bits/sample
scanimage: reading one scanline, 1911 bytes...  PASS
scanimage: reading one byte...          FAIL No data
scanimage: stepped read, 2 bytes...     FAIL No data
scanimage: stepped read, 4 bytes...     FAIL No data
scanimage: stepped read, 8 bytes...     FAIL No data
scanimage: stepped read, 16 bytes...    FAIL No data
scanimage: stepped read, 32 bytes...    FAIL No data
scanimage: stepped read, 64 bytes...    FAIL No data
scanimage: stepped read, 128 bytes...   FAIL No data
scanimage: stepped read, 256 bytes...   FAIL No data
scanimage: stepped read, 512 bytes...   FAIL No data
scanimage: stepped read, 1024 bytes...  FAIL No data
scanimage: stepped read, 2048 bytes...  PASS
scanimage: stepped read, 2047 bytes...  PASS
scanimage: stepped read, 1023 bytes...  FAIL No data
scanimage: stepped read, 511 bytes...   FAIL No data
scanimage: stepped read, 255 bytes...   FAIL No data
scanimage: stepped read, 127 bytes...   FAIL No data
scanimage: stepped read, 63 bytes...    FAIL No data
scanimage: stepped read, 31 bytes...    FAIL No data
scanimage: stepped read, 15 bytes...    FAIL No data
scanimage: stepped read, 7 bytes...     FAIL No data
scanimage: stepped read, 3 bytes...     FAIL No data

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