High quality zoom without performance loss

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crazytb
Posts: 124
Joined: Wed Oct 15, 2003 2:51 am
Location: Brazil

High quality zoom without performance loss

Post by crazytb »

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
Author of XnView
Posts: 36812
Joined: Mon Oct 13, 2003 7:31 am
Location: France

Re: High quality zoom without performance loss

Post by xnview »

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.