PDF24 OCR: Remove background has no effect

[nonab]

Hello.

I tried to use it online and it works after a few tries (172 pages pdf file) but can't make it work offline on windows 10.

It hangs in the state like on screenshot below and nothing is happening

Can you provide an advice on how to debug why it is not working ?

[nonab]

Ok it works, had to wait some time.

But there is one thing that i don't understand.

I checked "Remove background" but the background is not removed.

Here's the output file:

https://we.tl/t-wQRuQBH8Ya

[PDF24 Support]

Hello,

for anyone finding this topic: the option Remove background in PDF24 OCR (and in the PDF OCR tool of the PDF24 Toolbox) only changes pages that consist of exactly one scanned image. Pages that are made up of several images or contain normal text, and images with a transparency mask, are left unchanged.

On a suitable page it turns the light parts of the image white (for example greyish paper or light noise) and keeps the darker content as it is. A dark or strongly coloured background can therefore remain.

If the background stays on a scanned page with the current version, we would like to look at it. So that we can reproduce this, please send us a file where it happens with this button:

Send a file to the PDF24 team

OCR with this option is also available online: https://tools.pdf24.org/en/ocr-pdf

[Author]

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