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 ImageEn Library for Delphi, C++ and .Net
 ImageEn and IEvolution Support Forum
 moire patterns
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jrpcguru

USA
185 Posts

Posted - Oct 19 2021 :  14:53:34  Show Profile  Reply
I just came across moire patterns in a photo of a suit coat at a wedding. I thought I had read somewhere in your help file that there was an ImageEn setting that solved or reduced this problem, but I couldn't find it. I discovered that one of my programs had the problem and one didn't, so that led me to
ImageEnViewCompare.ZoomFilter := rfFastLinear;
My program with moire had rfNone.

I then checked your zoom filter demo program. rfNone is very bad for moire.
rfWICNearestNeighbor
rfWICCubic
rfWICLinear
These are all poor for moire. I wonder if that is worth documenting in the help file?


J.R.

xequte

6525 Posts

Posted - Oct 19 2021 :  20:38:23  Show Profile  Reply
Hi JR

Can you post or email me the sample image?

Nigel
Xequte Software
www.imageen.com
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jrpcguru

USA
185 Posts

Posted - Oct 19 2021 :  22:05:01  Show Profile  Reply

attach/jrpcguru/202110192246_Moire pattern - Copy.JPG

J.R.
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xequte

6525 Posts

Posted - Oct 24 2021 :  22:50:25  Show Profile  Reply
Thanks JR, I will improve the documentation for TResampleFilter for the next release.

Nigel
Xequte Software
www.imageen.com
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