Easier graphics compression [Resolved with RIOT]

Discuss anything related to portable freeware here.
Post Reply
Message
Author
User avatar
webfork
Posts: 9446
Joined: Wed Apr 11, 2007 8:06 pm
Location: US, Texas
Contact:

Easier graphics compression [Resolved with RIOT]

#1 Post by webfork » Sat Jun 26, 2010 1:03 pm

Note: This thread is not about photo (jpeg) graphics, but logos, screenshots, and scanned text.

The objective: Batch convert files to low color, high-compression images

Background: When you're trying to compress image files to their smallest possible size, the process is currently slow and painful. I can easily compress files by as much as 80%, but its tedious. (I touched on this in a related thread about PNG Optmizer.)

Current process
  1. Take image (usually a screenshot)
  2. Open FSViewer
  3. Open image in full screen
  4. Right click and select "save as"
  5. Choose "Save as type" and choose "GIF" format
  6. Select Options and gradually lower colors in the drop down box as low as possible and still acceptable. (32 colors is almost always great for almost any application.)
  7. Select OK
  8. Drag-and-drop file into a PNG compression tool like PNGOptimizer or OptiPNG
Is there any way to speed this up? I've tested XNView and FSViewer but with little success.


Why bother?
  • Web developers always want web graphics to be as small as possible.
  • Graphics are pretty small and hard drives are huge, but if its easy, why not?
  • Here on portablefreeware, the server only uses GIF files, which can easily go from 100k to 20k if you reduce the color set.
  • I'm currently working on a way to create a slide show of images and text for bug reports and feature requests. Neither OpenOffice Impress nor MS PowerPoint are very good about compressing graphics inside these presentations. Further, developers don't need pretty graphics to understand what's going on in their software.
----

Resolution: See the RIOT thread.
Last edited by webfork on Sat Jun 26, 2010 7:21 pm, edited 1 time in total.

User avatar
m^(2)
Posts: 890
Joined: Sat Mar 31, 2007 2:38 am
Location: Kce,PL
Contact:

Re: Easier graphics compression

#2 Post by m^(2) » Sun Jun 27, 2010 3:31 am

Try pngout. It's the strongest reasonably fast tool. Much faster than the most brute-force OptiPng modes and yet stronger.
There are also batches that combine several optimizers and are a bit stronger at the cost of _REALLY_ slow work.

User avatar
webfork
Posts: 9446
Joined: Wed Apr 11, 2007 8:06 pm
Location: US, Texas
Contact:

Re: Easier graphics compression

#3 Post by webfork » Sun Jun 27, 2010 5:41 am

Yeah it looks like if you're really serious about PNG compression, you'll want PNGOUT. That is *definitely* a command-line program.

Thanks for the info, m^(2).

User avatar
SYSTEM
Posts: 1937
Joined: Sat Jul 31, 2010 1:19 am
Location: Helsinki, Finland

Re: Easier graphics compression

#4 Post by SYSTEM » Tue Oct 11, 2011 1:03 pm

My YouTube channel | Release date of my 13th playlist: August 24, 2020

User avatar
Midas
Posts: 5477
Joined: Mon Dec 07, 2009 7:09 am
Location: Sol3

Re: Free PNG Optimization Tools

#5 Post by Midas » Tue May 21, 2013 3:00 am

[Old topic update] Raymond's blog has an article which surveys 13 freeware tools (some CLI only) for PNG optimization:

http://www.raymond.cc/blog/4-free-tools ... g-quality/

User avatar
webfork
Posts: 9446
Joined: Wed Apr 11, 2007 8:06 pm
Location: US, Texas
Contact:

Re: Easier graphics compression [Resolved with RIOT]

#6 Post by webfork » Mon Aug 15, 2016 4:37 pm

[Moderator note: posts about RIOT were given their own thread.]

Post Reply