Search found 188 matches
- 2012-11-16T20:34:10-07:00
- Forum: Digital Image Processing
- Topic: "Sigmoidal" minimization of resampling filter haloing & blur
- Replies: 136
- Views: 345416
Re: "Sigmoidal" minimization of resampling filter haloing &
But I think that we are at the point where the sensors are more "accurate" than the lenses, which means that at the pixel level, there is lens blur -> subcritical image. It's hard to judge because lenses have varied quality (http://www.lenstip.com/). We dunno whether we are having the sha...
- 2012-11-16T11:31:31-07:00
- Forum: Digital Image Processing
- Topic: "Sigmoidal" minimization of resampling filter haloing & blur
- Replies: 136
- Views: 345416
Re: "Sigmoidal" minimization of resampling filter haloing &
This being said, high contrast works well when the image is "sub-critical", meaning that the content stays clear of Nyquist. And I have the impression that what comes out of top of the line high megapixel DSLRs fits this description. What about Sigma DP1/DP2 Merrill? No bayer pattern. Bre...
- 2012-10-25T06:57:37-07:00
- Forum: Digital Image Processing
- Topic: Convert JPEG from progressive to baseline losslessly
- Replies: 14
- Views: 248913
Re: Convert JPEG from progressive to baseline losslessly
Use jpegtran. I remember that it can do so in a lossless way.
- 2012-10-22T06:04:16-07:00
- Forum: Digital Image Processing
- Topic: MSc thesis: quantitative comparison of enlargement filters
- Replies: 14
- Views: 32434
Re: MSc thesis: quantitative comparison of enlargement filte
Is madvr "commercially available"?
- 2012-10-21T18:30:19-07:00
- Forum: Users
- Topic: [Share] Compile IM6 with FFTW+HDRI using mingw64
- Replies: 4
- Views: 9777
Re: [Share] Compile IM6 with FFTW+HDRI using mingw64
This would make a nice addition if a copy was place at http://www.imagemagick.org/discourse-server/viewtopic.php?f=4&t=14251 I will do so after some fine-tuning. My compile is HDRI enabled already and it has FFTW statically linked in. Actually, I want to build a shared-library compile of ImageM...
- 2012-10-21T17:26:46-07:00
- Forum: Users
- Topic: [Share] Compile IM6 with FFTW+HDRI using mingw64
- Replies: 4
- Views: 9777
Re: [Share] Compile IM6 with FFTW+HDRI using mingw64
Should a "-fft -ift" roundtrip be producing a padded square picture? Both command below are producing a padded square picture with my own compile:
convert wizard.png wizard.png -fft -ift -quality 95 w3.png
convert wizard.png wizard.png +fft +ift -quality 95 w4.png
convert wizard.png wizard.png -fft -ift -quality 95 w3.png
convert wizard.png wizard.png +fft +ift -quality 95 w4.png
- 2012-10-21T10:07:46-07:00
- Forum: Users
- Topic: [Share] Compile IM6 with FFTW+HDRI using mingw64
- Replies: 4
- Views: 9777
[Share] Compile IM6 with FFTW+HDRI using mingw64
A) Download the following: Minimalist GNU for Windows (http://sourceforge.net/projects/mingw/files/Installer/mingw-get-inst/) MinGW-builds (http://sourceforge.net/projects/mingwbuilds/files/host-windows/releases/4.7.2/64-bit/threads-win32/sjlj/) zlib-1.2.7.tar.gz bzip2-1.0.6.tar.gz xz-5.0.4.tar.gz f...
- 2012-10-18T16:39:54-07:00
- Forum: Digital Image Processing
- Topic: sigmoidized EWA quadratic B-spline windowed Jinc 3-lobe
- Replies: 19
- Views: 52959
Re: sigmoidized EWA quadratic B-spline windowed Jinc 3-lobe
This being said, EWA Spline-windowed Jinc Radius 3 is an expensive way of getting a scheme which is very close to EWA Robidoux. (Noticeably better when downsampling? It's a little sharper and hopefully has "moire fighting" whiskers.) Yes, definitely better "moire fighting".... i...
- 2012-10-13T19:16:49-07:00
- Forum: Users
- Topic: Question on Convert + Montage
- Replies: 5
- Views: 9779
Re: Question on Convert + Montage
Yeah! "-respect-parenthesis" does the magic!
But why doesn't NicolasRobidoux need this parameter when he produces his samples?
But why doesn't NicolasRobidoux need this parameter when he produces his samples?
- 2012-10-13T10:48:13-07:00
- Forum: Users
- Topic: Question on Convert + Montage
- Replies: 5
- Views: 9779
Re: Question on Convert + Montage
In unix syntax (cygwin or msys): export DOUSM="-unsharp 0x0.75+0.75+0.008" export RESIZE="83x61! -alpha off +repage" ./convert wizard.png -set colorspace sRGB -colorspace RGB \ \( -clone 0 -filter Point -resize ${RESIZE} -set caption "Point" \) \ \( -clone 0 -filter Poi...
- 2012-10-13T08:45:57-07:00
- Forum: Bugs
- Topic: convert -sepia-tone different on win vs. linux
- Replies: 9
- Views: 17889
Re: convert -sepia-tone different on win vs. linux
what about
convert c.jpg -set colorspace sRGB -sepia-tone 80% 1.jpg
convert c.jpg -set colorspace sRGB -sepia-tone 80% 2.jpg
convert c.jpg -set colorspace sRGB -sepia-tone 80% 1.jpg
convert c.jpg -set colorspace sRGB -sepia-tone 80% 2.jpg
- 2012-10-12T23:21:29-07:00
- Forum: Users
- Topic: Question on Convert + Montage
- Replies: 5
- Views: 9779
Re: Question on Convert + Montage
The result is the same if I use "temp.mpc" instead of "temp.miff".
- 2012-10-12T21:31:00-07:00
- Forum: Users
- Topic: Question on Convert + Montage
- Replies: 5
- Views: 9779
Question on Convert + Montage
I tried to create a thumbnail image: set DOUSM=-unsharp 0x0.75+0.75+0.008 set RESIZE=83x61! -alpha off +repage convert wizard: -set colorspace sRGB -colorspace RGB ^ ^( -clone 0 -filter Point -resize %RESIZE% -set caption "Point" ^) ^ ^( -clone 0 -filter Point -resize %RESIZE% -set caption...
- 2012-10-10T03:47:36-07:00
- Forum: Users
- Topic: Help setting up imagick & ghostscript (will pay for help!)
- Replies: 1
- Views: 5762
Re: Help setting up imagick & ghostscript (will pay for help
Why don't you use ghostscript to convert the pdf to jpeg?
- 2012-10-09T18:38:37-07:00
- Forum: Users
- Topic: [SOLVED] Why "EWA Quadratic" becomes "EWA Quddratic"?
- Replies: 22
- Views: 29329
Re: [SOLVED] Why "EWA Quadratic" becomes "EWA Quddratic"?
Similar stuff for me.... I am now struggling with GCC 4.7.2 Mingw64's link-time-optimization (-flto) .... It gives weird linking error (it said a BZ2 decompression routine was declared as a variable but then re-defined as a function). No such error before I added -flto....