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05-17-2021 02:21 PM
I've got my Officejet Pro 8710 directly connected (via USB) to my Windows 10 machine. I've also just downloaded and installed the basic drivers from the HP website. I assume then, that I have the most recent drivers (IIRC, the file was dated several years ago as per the website, so I assume the drivers haven't been updated recently in any case).
When scanning, the scanner seems to apply some type of lossy (JPEG-like) compression in order to speed up transmission of data to the PC. Unfortunately, the artifacts from this compression are very apparent in the scans. On Linux, using XSane, there is an option to disable this compression and, when scanned via that method, the artifacts are gone. However, I want to be able to scan without those compression artifacts on my Windows PC as well. How can I achieve this?
I know some third party software claims it can do this on Windows. For example, Vuescan indicates that it allows bypassing the built-in JPEG compression done by the scanner (the same way Linux does). However, I'm assuming there's a way to bypass this using the official HP drivers for the scanner, but how? From what I've read, some HP scanner software has an option called "Optimize for Image Quality," but I cannot find any such option on my scanner.
I've also read elsewhere in discussions that this compression may not be employed for scans under 600 DPI. However, I don't want to scan at under 600 DPI. I want to scan at 600+ DPI without the compression artifacts.
Also, since I'm expecting someone will suggest I just save to a lossless file format -- I already am. The artifacts I'm talking about can be seen prior to even saving an image file. If you acquire an image in any software (NAPS, GIMP, etc.), you can see these artifacts. The artifacts are 100% coming from the scanner itself, and they're gone when compression is disabled in XSane on Linux.