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zhaojiahai / aforge

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Poor image quality when resizing large images to small thumbnails #190

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago 
What steps will reproduce the problem?
1. Open a large image in IPLab. In my case I was using a 6MB TIFF, 1772x1181
2. Resize to small thumbnail sizes, in my case I was using 720x480, 195x130, 
179x119, 120x80, 60x60 as my target formats
3. The smaller the image target size, the more apparent the quality reduction. 
In my case, only the 720x480 version of the image has anywhere near acceptable 
quality.

What is the expected output? What do you see instead?
I expect the quality of resized images to be decent even when the target size 
is small compared to the original. 

What version of the product are you using?
IPLab 2.7.0. Observed the same issues when using the AForge.NET framework in my 
own image resizing application.

Please provide any additional information below.
Additional information/initial discussions on the issue can be found at:
http://aforgenet.com/forum/viewtopic.php?f=2&t=1945

Original issue reported on code.google.com by tor.bads...@gmail.com on 15 Mar 2011 at 10:25