Can you try again using the CamScanner App https://play.google.com/store/apps/details?...er&hl=en_US This app can fix issues with the text looking blurry and adjust lighting, it also will allow you to crop the picture so you only get the document you want.
I decided to try, so I printed the same test page. It was shot in daylight near a window, with a 20W LED bulb celing light, not directly overhead. The first thing I noticed is that the landscape nature of the Gemini seems to confuse the CamScanner preview window
As you can see, the preview is rotated 90 degrees (and then stretched). This made positioning the document quite fiddly. Other than that, the scanning, straightening and enhancement worked as advertised, giving me this:
The remaining blur seems to come from either camera noise or attempts to remove it, and beyond improving contrast, there really isn't all that much the enhancement can do.
For reference, I tried again, this time just using the tools available in the Gemini stock camera app, and got this:
Since there is no perspective correction available there, this document could only be cropped, not deskewed, which, in turn, should preserve what little sharpness there may be, as there is no resampling involved. I think the result looks a bit worse but is a bit easier to read. The process is a lot more manual though, having to set sliders for whites, highlights, shadows, black etc. Also, the resulting JPEG file is about three times as large.
Finally, again for reference, I tried using my mobile go-to photo editor, simply called Photo Editor, by Dev.Macgyver. It has perspecive correction, which I used, and many different tools for contrast, but to keep the test realistic, that is, simple enough that I might actually stand to do it whenever I need to "scan" something, I chose the Effect>Black&White High Contrast, and got this:
[ Invalid Attachment ]
Since this is a general purpose photo editor, I am free to chose how heavily to compress the JPEG file. Because the camera is so noisy to begin with, I could set the quality at 50% and get a file size about that of CamScanner. I'd still say, this is the worst of the three, probably because this is the most "manual" tool, and I limited myself to what I could do in less than a minute.