I know about some 'advanced' converters, thats can
optimize jpeg files piecemeal, strongly squeezing "unimportant" areas and practically without touching real content of image. In addition, there are some rumors that different converters use different optimization methods for the same
JPEG quality value. So, they generate various in quality and optimization results. I need the most accurate tool to convert
JPGs practically without losses (visible to the naked eye).
The task involves choosing to convert only those images that do not contain transparent pixels (in any opacity level except of %100 for each pixel). I think, it's possible to use
imagemagick, but it inconvenient to use under windows, so, i'd like to find GUI tool (Yes, it is quite tedious to write scripts under Windows and "mine" the documentation imagemagick too).