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Image quality decreased drastically #17

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SarenT opened this issue Aug 12, 2017 · 4 comments
Closed

Image quality decreased drastically #17

SarenT opened this issue Aug 12, 2017 · 4 comments
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@SarenT
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SarenT commented Aug 12, 2017

Hi,
I realized the output images of digital watermarking are much smaller than the input images with worse JPG quality. It would be great to preserve image quality. At least keeping JPG quality similar to input image.

Best,
SarenT

@syvaidya syvaidya self-assigned this Aug 20, 2017
@syvaidya
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You can control the output compression for JPG by modifying openstego.ini file in user's home directory.

@SarenT
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SarenT commented Dec 17, 2017

I don't have that ini file in my user's home directory or elsewhere. I looked into the source code and it appears to be that one should have been created. I copied the one from the repo, which is supposed to be a template (it only includes that variable). My openstego ignored the file. My installation was from Ubuntu repositories. I cloned the most recent version now from github and built the project. The recent version created larger jpg files but they were all corrupted.

@SarenT
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SarenT commented Dec 17, 2017

Forgot to tell that I changed the quality to 1.0.

@syvaidya
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The file should get created first time you run the program. Could you please search your whole file system to see if it is generated? Ideally, it should be under home directory of the user, but I have not tested it on Linux.

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