save BMP -> PNG colors are messed up - like inverted

save BMP -> PNG colors are messed up - like inverted

shadaz 19 Jun 2010 16:01

Hi - i am trying to convert a bunch of bmp images to PNG and all the colors are messed up when I convert them using the SAVE feature.

I just tested converting to jpeg and even bmp to bmp. the result is always looking like it using wrong color table or something.

Any ideas? thanks.

Last edited on 19 Jun 2010 16:05 by shadaz Show more

Re: save BMP -> PNG colors are messed up - like inverted

stani 19 Jun 2010 21:57

Can you attach a sample image? Which version of Phatch are you using on which operating system?

Re: save BMP -> PNG colors are messed up - like inverted

shadaz 19 Jun 2010 22:27

Hi Stani,

Thank you so much for your response. I am on mac osx and I downloaded a precompiled version of phatch from a link at the very bottom of this page:
phatch - updated 5/31/2010

SAVE: BMP -> BMP

before
after

Last edited on 19 Jun 2010 22:28 by shadaz Show more

Re: save BMP -> PNG colors are messed up - like inverted

stani 21 Jun 2010 16:09

I can't reproduce this on Linux. I'll ask Robin our Mac OS X hero to have a look at it.

To be sure could you also attach your action list?

Re: save BMP -> PNG colors are messed up - like inverted

shadaz 21 Jun 2010 16:58

Its just 1 action SAVE, from BMP to BMP (or PNG, JPEG) always return same result. thanks for the help!

{'actions': [{'fields': {'As': u'<type>',
                         'File Name': u'<filename>',
                         'In': u'<desktop>/phatch/<subfolder>',
                         'JPEG Quality': u'85',
                         'JPEG Size Maximum': '0 kb',
                         'JPEG Size Tolerance': '10 kb',
                         'Metadata': 'yes',
                         'PNG Optimize': 'no',
                         'Resolution': u'<dpi>',
                         'Show Type Options': 'no',
                         'TIFF Compression': u'<compression>',
                         '__enabled__': 'yes'},
              'label': 'Save'}],
 'description': '',
 'version': '0.2.7'}

Re: save BMP -> PNG colors are messed up - like inverted

shadaz 21 Jun 2010 22:31

Stani,

Quick question: Did you test with the same image I posted? Or a different BMP? Maybe the BMP's i have have different header structure? If not can you try with the same bmp?

thanks for all the help, I love this tool and cant wait to use it, it is extremely powerful.

Re: save BMP -> PNG colors are messed up - like inverted

stani 22 Jun 2010 10:23

@shadaz

I tried with the BMP you provided. Don't worry. I am sure Robin can fix this.

Re: save BMP -> PNG colors are messed up - like inverted

shadaz 30 Jun 2010 04:03

Hi Stani, any update regarding this issue? thank you!

Re: save BMP -> PNG colors are messed up - like inverted

stani 30 Jun 2010 07:30

I am afraid Robin is on holiday and he does the Mac builds for Phatch. You can try to mail him directly. robin at clanmills dot com (http://clanmills.com/).

He might be away, so don't expect an answer immediately. He likes feedback anyway, so he will appreciate your email.

Re: save BMP -> PNG colors are messed up - like inverted

clanmills 01 Jul 2010 20:19

Hey, Shadaz

I'll try to look at this before I go on vacation. I want to get the latest (and greatest) Phatch 0.28 pre-release out this evening and I'll try to squeeze this in. It looks to me like an endian issue. Mac's used to be PPC/big-endian and of course they're now mostly Intel /little endian. I have an elderly powerbook/PPC Mac and a super-dooper intel iMac.

The other thought is that I think pixels can be written in the BMP as RGB or BGR (there's something in the 56 byte header to say which. I don't think I've ever encountered a BGR/BMP - maybe yours is the first. And your suggestion that the color table's wrong (if it's a palletized image). Or the pixels are upside down! Lots of interesting possibilities.

Let me run this on a couple of machines and get back to you.

Thank you for saying nice things about Phatch. I agree with you. Stani's concept in Phatch is quite excellent and that's why it's a privilege for me to contribute to the project. Thank you for taking the time to bring this to our attention.

Robin
http://clanmills.com

Re: save BMP -> PNG colors are messed up - like inverted

clanmills 02 Jul 2010 04:04

Hi S

I think this is fixed. As part of today's pre-release, I've upgrade PIL to 1.1.7 (thanks to a contribution from Russell Owen). I can convert bmps to pngs without going though the X-Ray machine. Check it out. You can open the APP dmg and run phatch from the DMG without changing anything. If you're happy, copy Phatch.app to your /Applications directory.

http://clanmills.com/Phatch28-prerelease/PhatchAPP-20100701-rmills-imac.dmg
http://clanmills.com/Phatch28-prerelease/PhatchPKG-20100701-rmills-imac.dmg

Let me know how this works for you. If this isn't fixed, please email your BMPs.

Robin
http://clanmills.com

Re: save BMP -> PNG colors are messed up - like inverted

shadaz 02 Jul 2010 05:18

Robin + Stani,

Thank you so much. It is working perfectly now. So I guess it was an endian issue eh?
Anyway, I really appreciate it - I will put it to use this weekend and report any issues I find.. but so far so good! I love the interface and the ability to do multiple actions. I also really appreciate the precompiled version - I always somehow get stuck when I have to compile stuff myself with command lines.

thank you!!!