Search found 54 matches
- 2010-11-19T10:17:58-07:00
- Forum: Users
- Topic: how to tell if image has 8 bit indexed palette
- Replies: 10
- Views: 24350
Re: how to tell if image has 8 bit indexed palette
That pre thumbnailing makes sense and is similar to how I handle tracking large amounts of autocad drawings. I tried the %r on a png which is 8 bit indexed RGB color, and it gave back DirectClassRGBMatte. I double checked the format of the image with Corel PhotoPaint, and it was still 8 bit indexed....
- 2010-11-18T15:28:44-07:00
- Forum: Users
- Topic: how to tell if image has 8 bit indexed palette
- Replies: 10
- Views: 24350
Re: how to tell if image has 8 bit indexed palette
ah! thanks a bunch for clarifying that.
Hope I can contribute back sometime as I use IM more and more in Engineering.
Hope I can contribute back sometime as I use IM more and more in Engineering.
- 2010-11-18T10:16:49-07:00
- Forum: Users
- Topic: how to tell if image has 8 bit indexed palette
- Replies: 10
- Views: 24350
Re: how to tell if image has 8 bit indexed palette
I read the suggested usage section, but those examples do not address the issue of if an image has an indexed color palette, or RGB. Also, they use the -verbose option of idetify, which locks up on most large images I have. I was impressed at the cleverness of how to categorize images, its just that...
- 2010-11-18T09:15:14-07:00
- Forum: Users
- Topic: how to tell if image has 8 bit indexed palette
- Replies: 10
- Views: 24350
Re: how to tell if image has 8 bit indexed palette
ah, did not see that section before, will read.
The problem (possibly unavoidable) id the %k takes a long time on big images.
I am seeing 5 to 10 second second return times.
At least it handle the large images, not like my previous GDI routines in C#.
The problem (possibly unavoidable) id the %k takes a long time on big images.
I am seeing 5 to 10 second second return times.
At least it handle the large images, not like my previous GDI routines in C#.
- 2010-11-17T14:30:29-07:00
- Forum: Users
- Topic: how to tell if image has 8 bit indexed palette
- Replies: 10
- Views: 24350
how to tell if image has 8 bit indexed palette
I am making tools that do conversions and make decisions based on if an image fits these categories: 1 bit black and white 8 bit greyscale 8 bit RGB indexed palette 24 bit RGB everything else above that is considered 24 bit RGB to me, since we just handle that as a "full color" image, as t...
- 2007-01-17T18:37:44-07:00
- Forum: Users
- Topic: How to preserve color palette when resizing
- Replies: 4
- Views: 15052
- 2007-01-17T15:46:06-07:00
- Forum: Users
- Topic: How to preserve color palette when resizing
- Replies: 4
- Views: 15052
I tried that just now, did not work. The size action worked fine but I got a 24 bit rgb image instead of 8 bit. Any reason why I should be using the Q16 as opposed to Q8? I just chose the one that looked the most powerful. Maybe its not suited to people that only work with 24bit and lower colors. th...
- 2007-01-17T15:20:36-07:00
- Forum: Users
- Topic: How to preserve color palette when resizing
- Replies: 4
- Views: 15052
How to preserve color palette when resizing
I typically keep images of maps and things as tifs with 8-bit color, with an optimized palette. I do this through corel photo paint. Many times, I want to resize a map or photo by 50%. I am using convert.exe so I tried: convert USGS.tif -resize 50%% -compress rle USGSsmaller.tif The %% is because I ...
- 2006-05-03T09:56:38-07:00
- Forum: Users
- Topic: How to do "Optimized Palette" like Corel Photo Pai
- Replies: 0
- Views: 6577
How to do "Optimized Palette" like Corel Photo Pai
I do a couple things with Corel PP that I want to do with IM. 1) Convert a 24 bit color image to 8 bit. In PP, there is an option to use "optimized palette", which basically gives a very nice match between the old and new image, even though the color depth went down. How do I do this with ...