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1. Modul8 bilinear filter vs lossless quality preload software#
2. Modul8 bilinear filter vs lossless quality preload code#

Modul8 bilinear filter vs lossless quality preload code#

Unfortunately there's a bug in the code when upsizing - rather than taking in an area of 6圆 pixels to calculate the result, it's truncated at 2x2 pixels. This is based on a Lanczos-3 filter, which would ordinarily be a good choice for both downsizing and upsizing. This means that enlarged images will have unnatural bright or dark halos around edges. In the Mitchell-Netravali paper this is clearly in the Ringing artifact region. Don Mitchell and Arun Netravali wrote a paper that analyzes all the variations and characterizes them using two variables B and C the one used by PIL corresponds to B=0 and C=1. There are a number of formulas which can be classified as bicubic, the most common of these being the Catmull-Rom interpolation. Personally, I kind of like the retro pixely look of nearest neighbour texture filtering, but of course bilinear is better in general especially for more realistic games (Call of Duty, God of War for example) but I think for older games with lower deatailed textures nearest works pretty well, it gives the game a kind of retro look which I like. I'm not terribly pleased by what I saw.įirst, BICUBIC. I've now gone through the source to figure out the details. I'm leaving it here for those with older versions, although I'd highly advise you to upgrade. The below is no longer valid, it was fixed in Pillow 2.7. I’m on mobile and it works for me When I zoom in I see bicubic is sharp and even sharper on Lanczos, the two others are blurry and blurrier.

Modul8 bilinear filter vs lossless quality preload software#

Alternatively, here are the individual images and you can use some other software to compare the images. If omitted, or if the image has mode “1” or “P”, it is set Bilinear/area are much blurrier than bicubic and lanczos. (cubic spline interpolation), or (a high-qualityĭownsampling filter).

(use nearest neighbour), (linear interpolation), resample – An optional resampling filter. You probably weren't the only one confused by them. The documentation has been changed since the question was asked, and the references to 2x2 or 4x4 have been removed. LANCZOS uses a larger pattern than BICUBIC and should produce slightly sharper results. You can still use ANTIALIAS in your code for backward compatibility purposes but it's not recommended. ANTIALIAS is no longer the proper term, it was replaced by LANCZOS which is a more descriptive term for the algorithm used.