Tilman Hausherr commented on PDFBOX-4078:

I did some tracing to be sure that the rendering hints are properly set and yes 
they are. There is some internet discussion about the quality of image resizing:

using one of these would require additional software and additional code, as 
the tools I've seen don't draw with a transformation (which is what we do) but 
rescale the image. One would have to analyse the transform to extract a fixed 
scale, apply a good algorithm on the image, and then draw the scaled image with 
the remaining part of the transform.

> different rendering on different scale
> --------------------------------------
>                 Key: PDFBOX-4078
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4078
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Rendering
>    Affects Versions: 2.0.8
>            Reporter: savan patel
>            Priority: Major
>         Attachments: Rendering_Issue.pdf
> i have attached a pdf... If i set scale 1 and render it then it renders very 
> poorly but if i increase the scale then rendering becomes clear...

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