Legacy ImageMagick Discussions Archive

PhaseOne!
RuleZ!!
Congratulations!!!
They are lucky to have you.

NicolasRobidoux,
I agree with your finds, looks like you found the best neutral/balanced option...

EWA :D I used the batch file, it got this convert %1 -filter Catrom -distort resize 1200x1200 "%~n1_EWAcatromSRGB.tif convert %1 -colorspace RGB -filter Catrom -distort resize 1200x1200 -colorspace sRGB "%~n1_EWAcatrom.tif convert %1 -colorspace RGB -filter Lanczos2 -define filter:blur=0 ...

Henry: Bruno George Moraes (Brazilian embedded systems software engineer with an interest in image processing) is really impressed by the main demosaicing method of http://www.my-spot.com/RHC/RHC_Demosiac.htm . Good links about RAW demosaicing algorithms http://www.libraw.org/articles/bayer-moire ...

Henry and Luiz and whoever else feels like testing and posting opinions: Could you please let me know what you think of EWA Lanczos2Sharpest, Lanczos3Sharpest and Lanczos4Sharpest as downsampling schemes, ideally through linear light? Sorry for the delay, I need to set my forum options to monitor ...

In case anyone else happened to see this post for the first time, here the “cake recipe” for easy following. -With the backpack http://www.mediafire.com/i/?uz8dphpj6q0y6n5 -Convert to TIFF or PNG -3 versions(4, 3 and 2 lobes) for ImageMagick, can use orthogonal or EWA, deblurred or not convert Bac ...

NicolasRobidoux wrote:With what I see for the fly, orthogonal Lanczos is in the "bad" bin for me as far as downsampling goes: too much moire compared to several other methods.

True...
What is good for image Y is not for X, life is hard for pixel peepers...
The pixel peeper I am talking, it is me...

Kaiser3 seems to give good results. I'll see what comes out of Adam's thesis, and will think about optimizing taking "2D" explicitly into account (like I did with LanczosSharp, LanczosSharpest, Robidoux, RobidouxSharp...). My curiosity about Kaiser is that I read somewhere it may be better than ...

henrywho wrote: I think the range from EWA-Robidoux to EWA-Catrom should cover most uses.

But I am still friend to orthogonal Lanczos/Mitchell and the “moiréless” 4 lobes thing...

I prefer the backpack texture with orthogonal, at least when resizing to 1200...
convert INPUT -filter Lanczos -define filter:lobes=4 -define filter:blur=0.88451002338585141 -resize 1200x1200 OUTPUT
or
convert INPUT -filter Lanczos -define filter:blur=0.88549061701764 -resize 1200x1200 OUTPUT

Indeed, the sharper the source, the less sharp the downsizer should be. If we have some algorithm to evaluate the sharpness, can we have some automatic calculation for "b" like f(source_sharpness, user_preferred_sharpness)? Although a user is likely to fairly quickly figure out what b they like in ...

EWA-Lagrange looks like a less sharp EWA-Catroom and I prefer EWA-Lancozs3 and EWA-Mitchell over EWA-SincSinc2, how would be a good command line for kaiser?

This topic is gold, thanks guys! The backpack, I prefer the linear light version, but the windmill nobody likes the house bricks in the linear light version... :lol: I am enjoying the sharpness of EWA Catrom, sadly it is not 100% moiré free as we can see in the backpack center strip and in the house ...