This is the Windows app named pngnq-s9 whose latest release can be downloaded as pngnq-s9-2.0.2.zip. It can be run online in the free hosting provider OnWorks for workstations.
Download and run online this app named pngnq-s9 with OnWorks for free.
Follow these instructions in order to run this app:
- 1. Downloaded this application in your PC.
- 2. Enter in our file manager https://www.onworks.net/myfiles.php?username=XXXXX with the username that you want.
- 3. Upload this application in such filemanager.
- 4. Start any OS OnWorks online emulator from this website, but better Windows online emulator.
- 5. From the OnWorks Windows OS you have just started, goto our file manager https://www.onworks.net/myfiles.php?username=XXXXX with the username that you want.
- 6. Download the application and install it.
- 7. Download Wine from your Linux distributions software repositories. Once installed, you can then double-click the app to run them with Wine. You can also try PlayOnLinux, a fancy interface over Wine that will help you install popular Windows programs and games.
Wine is a way to run Windows software on Linux, but with no Windows required. Wine is an open-source Windows compatibility layer that can run Windows programs directly on any Linux desktop. Essentially, Wine is trying to re-implement enough of Windows from scratch so that it can run all those Windows applications without actually needing Windows.
pngnq-s9 is a modified version of pngnq, the neural network colour quantizer for png images.
Like pngnq, pngnq-s9 takes a full 32 bit RGBA png image, selects a palette of up to 256 colours, and then redraws the image in 8 bit indexed mode. The resulting image can be up to 70% smaller than the original.
pngnq-s9 adds several new options to pngnq including the ability to augment a user-supplied palette, the ability to quantize in the YUV colour space, and the ability to give more or less weight to specific colour components when quantizing. The program also includes a few bug fixes relative to the most recent version of pngnq.
The .tar.gz files have been known to compile on Unix type systems, including Cygwin. The only external dependencies are libpng and zlib.
For Windows users, we have a 32 bit binary, in pngnq-s9-2.0.2.zip, that should run as is on most modern Windows machines.
- Quantizes 32 bit RGBA png images down to 256 colours or fewer, just like pngnq.
- selectable internal colour space (either RGBA or YUVA)
- use different sensitivities for each colour component
- supply your own fixed palette, and optionally select additional colours as well. Very useful if you need particular colours to remain stable.
- better colour selection through longer learning and improved rejection of duplicate colours
- various options to alter colour selection policy (see -x, -u)
- options to stop alpha values of 0 and 255 being 'smudged' to nearby values
- selectable level of Floyd-Steinberg style dithering
- suppresses writing of png gAMA chunk by default
- suppresses writing of png background colour chunk
- bug fix for occasional remapping to the wrong colour (relative to pngnq 1.1)
- bug fix for a relatively harmless flaw in implementation of Floyd-Steinberg dithering (relative to pngnq 1.1)
This is an application that can also be fetched from https://sourceforge.net/projects/pngnqs9/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.