4 ms·
Ok, but is it actually computing the same thing? Are the blurred images from photopea and photoshop identical? The article mentions always doing no more than
by soamv 10y ago
Ok, but is it actually computing the same thing? Are the blurred images from photopea and photoshop identical? The article mentions always doing no more than N*10 steps -- is this an approximation algorithm?
- deleted 10y ago[deleted]
- IvanK_net 10y agoPhotopea and Gimp do compute the same thing (Surface Blur by definition). However, in Photoshop, the results at the radius >= 50px are slightly different. I have a suspicion, that Photoshop uses an approximation algorithm. N*10 algorithm has an overhead, it needs a little more time (and memory) per pixel, but it does not depend on the radius. It is an exact algorithm (no approximation).
- initram 10y agoI can't speak to the actual algorithm, but Photoshop also does various types of color space conversions unless you explicitly set it not to. I didn't see anywhere in the article where that was mentioned, or whether Photopea does those same conversions.
- IvanK_net 10y agoI hope that Photoshop does not do any conversion, when it is not necessary. Color space conversion is performed e.g. when changing saturation, vibrance etc. But I think it is not necessary in this case.