You are not logged in.

Dear visitor, welcome to Forum. If this is your first visit here, please read the Help. It explains in detail how this page works. To use all features of this page, you should consider registering. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.


Tuesday, May 19th 2009, 2:04pm

Resolution dependent sharpening

I have bought krpano because after long investigation I came to the conclusion that it delivers the best image quality (aside from deval) among pano viewers.

The HIGHSHARP option provides possibility to control image quality what is usually not available in other pano viewers. Very much welcomed feature. The comparison of original jpg image and the image displayed with krpano shows ony sligt degradation of image quality, mainly due to desaturation and loss of sharpness. Therefore sharpening option may do good job to increase image quality.

However my tests show that for low resolution images the HIGHSHARP option gives highly oversharpened images with ugly artifacts and is hardly usable. I usually publish 360 ° cyindric images of 1024px height. Even 3000px height, results in too oversharpened image. In summary, HIGHSHARP results in oversharpened image, HIGH gives not enough sharp image.

The ideal solution would be to apply USM with radius and amount that are dependent on image resolution. Or at least providing more control over sharpening amount would be very much appreciated. Instead of giving 3 sharpening parameters, a range, e.g 0-100 would be a good solution. It could be assgned 0=LOW and 100=HIGHSHARP. The values in between would allow fine tuning according to the needs of the user.

Could you please consider the extension of the sharpening feature.


Tuesday, May 19th 2009, 2:51pm


I have already planned to add more control over the sharping,
should be available in one of the next 1.0.8 beta releases,

best regards,


Tuesday, May 19th 2009, 3:03pm

Thank you !

Very good message.

Similar threads