Discussion:
simulate a scan with test device?
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Jeff Sadowski
2017-09-29 20:30:05 UTC
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Most of the systems I am using don't have actual scanners attached. I'd
like to simulate a flatbed scanner by copying an image chunk by chunk with
a delay and even simulate selecting an area and resolution by using a high
def image to copy from and get a lower res depending on the settings I
give. Is this already built into sane-test backend somehow?

When I tried with

scanimage -d 'test:0' --batch="sane-test%d.tiff" --batch-count 1 --format
tiff

I output image was all black and there was no delay

I'm thinking I could simulate this using imagemagick's convert program
and a simple program to copy a bit at a time.
Jeff
2017-09-30 20:35:39 UTC
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Post by Jeff Sadowski
Most of the systems I am using don't have actual scanners attached. I'd
like to simulate a flatbed scanner by copying an image chunk by chunk
with a delay and even simulate selecting an area and resolution by using
a high def image to copy from and get a lower res depending on the
settings I give. Is this already built into sane-test backend somehow?
When I tried with
scanimage -d 'test:0' --batch="sane-test%d.tiff" --batch-count 1
--format tiff
I output image was all black and there was no delay
I'm thinking I could simulate this using imagemagick's convert program
and a simple program to copy a bit at a time.
If you look at scanimage --device=test --help, you will see that there
is a delay option (along with almost anything else you need to test your
frontend).

Regards

Jeff

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