I am looking for the BEST possible PNG compressor. I know that PNGs are already compressed and therefore´incompressible´, but it´s possible to fully decompress it and then apply better compressor for raw output - for example PRECOMP. I haven´t tested it, so I cannot say if it´s possible to shrink it losslessly further - I have a 5MB PNG file captured with LENOVO A-2010 smartphone with OpenCamera app. The "identical" (I needed to switch between apps between shots, so the scene may not be 100% identical) scene shooted without it takes approx. 980 KB, but JPEGs cannot be compressed below 50% - btw, I am working on my custom data compressor - BestComp - that will be able to compress ANY kind of data at least to 90% losslessly.
Therefore I need to know if it´s possible to compress PNGs at least to 95% of original size losslessly of course.