skip single pixel images in PDF

[axu2]

• Fixes [Bug] Every Other Page are Gray Pages(PDF Issue) #540

[derzz]

Ok so good news is that it fixed the majority of the pages. However, there are still some pages in my manga that are showing these gray pixels again. Here's the pages that are having this issue again. Nonetheless, thank you for your work so far!
よつばと! 第01巻_removed.pdf

[axu2]

@derzz Can you add this line to the code:

print(iend-istart)

and adjust the thresholds as appropriate based on what you see?

In my case, image lengths were:

642423
160
302131
159
317957
160

Skipping images based on size is REALLY hacky though. Feel free to look into better pdf jpg extraction methods.

[derzz]

Ok, I got it now, I changed the boundaries to 287 since some image lengths were being to that number. Nonetheless, skipping images by these sizes should be fine since these are small values compared to the manga's pages whose full length should be in the thousands. Thank you so much for your help! :)

[darodi]

testing this and then merging