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Re: Windows software used a "sharpen" filter
by Saint on Thursday May 24, 2001 @ 10:24 PM
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Very cool. GIMP is great, thanks for the tip with shapren I'll use it a bunch now. -- Saint
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Just be careful using sharpening...
by Egor Zindy on Saturday June 02, 2001 @ 03:33 PM
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Saint,
Just a quick reminder, sharpening is done by increasing the images high frequencies (i.e. the details).
After doing so, as somebody else noticed, you cannot compress your image as well when the details as boosted and the final image (be it png, gif or jpeg) will be bigger.
Also, and this is especially important for medical images, by increasing the high frequencies, you enhance both the real details and the image noise.
If you still want to sharpen your images, check this link. It's a gimp plugin which uses a nifty warping algorithm to squeeze the edges instead of applying brain-dead convolution masks (I am not saying that this is how gimp does it, but I suspect...)
Hope this helps! Anyway, the fact that xsane does not automagically processes the images for you should be seen as a good thing: If you want to apply some image processing to the image (color balance, etc..), then fine! At least, by doing it yourself and being aware you have done so, you won't rely on this shitty stuff manufacturers might have added to their software to hide their product's shortcomings.
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Re: Windows software used a "sharpen" filter
by Saint on Friday May 25, 2001 @ 08:54 PM
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Per echo above: In order to get the sharpen effect with Gimp 1.2 load up the image, and then right click on the image and choose "Filters... Enhance... Sharpen" move the slider as desired a voila!
-- Saint
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Re: Windows software used a "sharpen" filter
by praveen choudhary on Thursday January 16, 2003 @ 02:50 AM
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plz tell me a picture filter how its works how a software can define a picture or read a picture.
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Re: Windows software used a "sharpen" filter
by praveen choudhary on Thursday January 16, 2003 @ 02:50 AM
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plz tell me a picture filter how its works how a software can define a picture or read a picture.
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