Listing 1.
Usage: scanimage [OPTION]...
Start image acquisition on a scanner device and write PNM image data to
standard output.
-d, --device-name=DEVICE use a given scanner device
-h, --help display this help message and exit
-L, --list-devices show available scanner devices
-v, --verbose give even more status messages
-V, --version print version information
Options specific to device `pnm':
Source Selection:
--filename <string> [/tmp/input.ppm]
The filename of the image to be loaded.
Image Enhancement:
--brightness -100...100% [0]
Controls the brightness of the acquired image.
--contrast -100...100% [0]
Controls the contrast of the acquired image.
--grayify[=(yes|no)] [no]
Load the image as grayscale.
--three-pass[=(yes|no)] [no]
Simulate a three-pass scanner by returning 3 separate frames. For
kicks, it returns green, then blue, then red.
--hand-scanner[=(yes|no)] [no]
Simulate a hand-scanner. Hand-scanners often do not know the image
height a priori. Instead, they return a height of -1. Setting this
option allows one to test whether a front end can handle this correctly.
--default-enhancements
Set default values for enhancement controls (brightness & contrast).
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