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Exporting blurs image


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Hi!

 

Congratulations on the RC!

 

I have noticed that saving an image via the Export option blurs the output image if it has been previously resized. The Export requester has a dropdown menu with resampling options (and there's no choice for "no resampling"), so it seems the image is being once again resampled upon export. I've confirmed this for different file formats, including jpg, png and tiff.

 

Resampling the image does make sense if one is asking to export an image with a different resolution. But if one has already rescaled it using Resize Document and then exports it to save it, the resampling takes place twice and ends up adding blur (Nearest Neighbour & Lanczos are the ones with the least amount of blurring, but there are still changes in the image).

 

This does not happen in Krita. What you save is what you get.

 

Here go some sample images.

 

Affinity Photo - export directly and rescale at the same time (no blur)

post-42414-0-78701800-1481052838_thumb.jpg

 

Affinity Photo - rescale using Resize Document, then export image (blur)

post-42414-0-53126400-1481052855_thumb.jpg

 

Krita - rescale image, then save (no blur)

post-42414-0-02033300-1481053167_thumb.jpg

 

PNG files for better quality comparison

Affinity Photo - export directly and rescale at the same time (no blur)

post-42414-0-39454200-1481054276_thumb.png

 

Affinity Photo - rescale using Resize Document, then export image (blur)

post-42414-0-80994500-1481054293_thumb.png

 

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