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Here is one of the PDFs that I’m trying to convert. I want the program to trim off the excess white-space and return a high enough quality image that the superscripts can be read with ease.
This is my current best attempt. As you can see, the trimming works fine, I just need to sharpen up the resolution quite a bit. JPEG higher would be greatly appreciated! It results in the left image.
To really see and appreciate the differences between the two, right-click on each and select “Open Image in New Tab”. The worse, blurry image on the right has a file size of 1. Its resolution is 3060×3960 pixels, using 16-bit RGB color space. The better, sharp image on the left has a file size of 337.
Its resolution is 758×996 pixels, using 8-bit Gray color space. The density value 150 is weird — trying a range of values results in a worse looking image in both directions! The density parameter is a bit special in that in must come before the input file. If you want pixel, you use the density setting to tell it, how many pixels per inch you want to get in the output.
1800 pixels in the resulting image. That’s also the amount of pixels the sharpen, contrast, compression etc. To fix this, add -flatten.