High quality zoom without performance loss

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crazytb
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Joined: Wed Oct 15, 2003 2:51 am
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High quality zoom without performance loss

Post by crazytb » Thu Jan 01, 2004 6:43 am

I like high quality zoom, but it is a bit slow. I have one idea to improve it. It will be like progressive display. First show bad quality fast, then the high quality.

When needed to apply the high quality filter, first show the unfiltered image and use a background thread to apply the filter. When the thread finishes its work, the filtered image is showed.

Maybe, another idea, is to apply the filter only to the part of image that will be visible, show it, and then apply the filter to entire image in a background thread.

This will allow me to work faster, without filtering slowdown.

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xnview
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Re: High quality zoom without performance loss

Post by xnview » Wed Jan 21, 2004 3:33 pm

crazytb wrote:I like high quality zoom, but it is a bit slow. I have one idea to improve it. It will be like progressive display. First show bad quality fast, then the high quality.

When needed to apply the high quality filter, first show the unfiltered image and use a background thread to apply the filter. When the thread finishes its work, the filtered image is showed.

Maybe, another idea, is to apply the filter only to the part of image that will be visible, show it, and then apply the filter to entire image in a background thread.

This will allow me to work faster, without filtering slowdown.
Yes very good idea, but some work for me :wink:
Pierre.

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