Search found 56 matches

by BryantMoore
2012-09-26T03:54:25-07:00
Forum: Digital Image Processing
Topic: bamupsampler
Replies: 14
Views: 30165

bamupsampler

I think I might have a decent scheme for upsampling. Original http://puu.sh/18LYS Bilinear http://puu.sh/18LZQ convert floor.jpg +filter -resize 400% triangle2.png Bamupsampler http://puu.sh/18LYa convert floor.jpg -colorspace rgb +sigmoidal-contrast 8 -define filter:blur=1 -define filter:support=4 ...
by BryantMoore
2012-09-25T18:27:59-07:00
Forum: Users
Topic: ImageMagick 7 Windows builds?
Replies: 15
Views: 19430

Re: ImageMagick 7 Windows builds?

I'm just going to build for Cygwin, I've installed autoconf, make and gcc... we'll see what happens. :)

http://ompldr.org/vZm4yYw

What exactly is happening here? :shock:
by BryantMoore
2012-09-25T14:22:58-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

The "standard" test I and others use with the fly is resizing to exactly 403x600. Then, you can compare to the million versions of this test I have in the Forums. This is not an integer ratio by any means. http://puu.sh/18Ceu convert fly.jpg -colorspace rgb +sigmoidal-contrast 8 -define filter:blur...
by BryantMoore
2012-09-25T13:49:49-07:00
Forum: Users
Topic: ImageMagick 7 Windows builds?
Replies: 15
Views: 19430

Re: ImageMagick 7 Windows builds?

fmw42 wrote:As far a I know there are no Windows archives of binaries and no precompiled HDRI versions of IM for any platform
Will Visual Studio Express 2012 work for compiling ImageMagick on Windows?
by BryantMoore
2012-09-25T12:31:49-07:00
Forum: Users
Topic: ImageMagick 7 Windows builds?
Replies: 15
Views: 19430

ImageMagick 7 Windows builds?

Does anyone know where I can find builds of ImageMagick 7 for Windows? I've never built a program before and I would like to play with HDRI mode.
by BryantMoore
2012-09-25T09:48:01-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=20992&p=85021&hilit=wikipedia#p85021 bamscaler4 http://puu.sh/18xgj convert fly.jpg -colorspace rgb +sigmoidal-contrast 8 -define filter:blur=1 -define filter:support=2 -define filter:win-support=2 -define filter:kaiser-beta=4 -define ...
by BryantMoore
2012-09-25T07:55:39-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

@Bryant: The only high frequency components of your latest image are sharp interfaces between essentially flat colour areas, exactly the type of thing sigmoidization does well at. Because the only "drift" is along boundaries, of course you don't see colour drift. Perhaps this image has more high fr...
by BryantMoore
2012-09-24T17:05:08-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

@NicolasRobidoux Kaiser w/o Sigmoidal Contrast https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/comparison3/downsample-bamsampler.png convert large.png -colorspace rgb -define filter:kaiser-beta=4 -define filter:window=kaiser -filter jinc -distort resize 1920 -colorspace ...
by BryantMoore
2012-09-24T11:30:48-07:00
Forum: Digital Image Processing
Topic: sigmoidized EWA quadratic B-spline windowed Jinc 3-lobe
Replies: 19
Views: 43820

Re: sigmoidized EWA quadratic B-spline windowed Jinc 3-lobe

@NicolasRobidoux
Could you perhaps test your filter on the original image I have uploaded in this post?

viewtopic.php?p=90497#p90497

:)
by BryantMoore
2012-09-24T04:27:44-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

Can we have one or two of the full sized originals for testing? I only have the original for the second image. https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/comparison2/large-comp.png :) EDIT bamsampler2 https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sou...
by BryantMoore
2012-09-24T02:20:01-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

Aliased 1280x720 https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/comparison2/original-comp.png Antialiased from 20480x11520 w/ BAM Scaler https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/comparison2/downsampled.png convert large.png \( +clone...
by BryantMoore
2012-09-24T00:52:28-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

Re: BAM Scaler

Okay I think I've finally decided on my settings. Aliased 1280x720 https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/comparison/original.png Antialiased from 5120x2880 https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/comparison/bamscaler.png Imp...
by BryantMoore
2012-09-23T13:52:02-07:00
Forum: Digital Image Processing
Topic: BAM Scaler
Replies: 13
Views: 28308

BAM Scaler

I think I'm getting closer to what I want to do with BAM Scaler. https://dl.dropbox.com/u/106615031/dsp/imagemagick/bamscaler/sourcefilmmaker/bamscaler.png I'm not embedding the image because it's over 2MiB in size. The original file is 7680x4320. #!/bin/bash convert 0000.tga \( +clone -colorspace r...
by BryantMoore
2012-09-23T13:34:39-07:00
Forum: Digital Image Processing
Topic: The rehabilitation of gamma
Replies: 1
Views: 6932

Re: The rehabilitation of gamma

This is a very interesting topic to me; I've always wanted to read about linearity and how it applies to signals and the processing of them. :)
by BryantMoore
2012-09-22T23:40:13-07:00
Forum: Digital Image Processing
Topic: Enlarge with sRGB, RGB, LAB, LUV, XYZ, sigmoidal,... gamma?
Replies: 113
Views: 227042

Re: Enlarge with sRGB, RGB, LAB, LUV, XYZ, sigmoidal...?

fmw42 wrote:A sigmoidal contrast value of 8 is more in range with what Nicolas Robidoux has been using.

Are you trying to use the same filter for both enlarging and reducing?
Yes I am.