XnView Software

But why ?
Filesize very deffirent in JASPER and LuraWave : for example
File1
LuraWave JPEG2000 file size 26 720 254 bytes
JASPER JPEG2000 file size 28 318 077 bytes
File2
LuraWave JPEG2000 file size 13 975 604 bytes
JASPER JPEG2000 file size 16 134 170 bytes
File3
LuraWave JPEG2000 file size 23 699 653 bytes
JASPER JPEG2000 file size 26 466 914 bytes

So will be LuraWave compressor in x64 versions or that ? Still need use x86 version to better compressino images in JPEG2000 ?

Xn User wrote: Mon Aug 15, 2022 11:58 pm So will be LuraWave compressor in x64 versions or that ? Still need use x86 version to better compressino images in JPEG2000 ?

No Lurawave doesn't give me anymore the access to codec

No , this you something do not so as need )
I sayd my friend and we test this and we use this
https://github.com/uclouvain/openjpeg/r ... tag/v2.5.2
openjpeg-v2.5.2-windows-x86.zip
and we both recived size as in LuraWave compressor , but in your version in XnConvert openjp2.dll size very different in bad side , this realy bad
please , do normal settings for Open JPEG 2000

And so , I decided to prove that I am right
In archives , results compressions and OpenJPEG2000 compressor from github

LuraWave JPEG2000 Result size 2 985 357 bytes
Open JPEG2000 from XnConvert and XnView classic new and XnViewMP new Result size 3 822 231 bytes
Open JPEG2000 from GitHub Result size 3 041 305 bytes
Origital image size 5 287 184 bytes

why if I select OpenJPEG2000 so bad compressed in Xn products ?

Thanks to your detailed description I can reproduce the problem.

This problem is supposed to be fixed in XnView MP 1.8.4. Please check and confirm the bug fix here.