Search found 23208 matches

by fmw42
2018-06-18T15:08:28-07:00
Forum: Bugs
Topic: possible bug +distort polynomial
Replies: 3
Views: 37

Re: possible bug +distort polynomial

I will try to add it the next time I do edits. I put in all your previous ones by the way last week.
by fmw42
2018-06-18T13:15:20-07:00
Forum: Bugs
Topic: possible bug +distort polynomial
Replies: 3
Views: 37

possible bug +distort polynomial

Tested with IM 6.9.10.1 Q16 Mac OSX Ultimately I am trying to use +distort polynomial for a 2 or 3 order polynomial. But I could not get it to work properly. So I made a simple test case with a first order transformation and compared +distort affine to +distort polynomial. Here are my test. Essentia...
by fmw42
2018-06-18T13:10:20-07:00
Forum: Magick.NET
Topic: Error combining jp2 files with magick.net
Replies: 5
Views: 117

Re: Error combining jp2 files with magick.net

Dirk,

Magick and I started working on multi-channel tiffs a while back. But we did not finish it. So there may be some initial coding somewhere in IM.
by fmw42
2018-06-18T10:44:48-07:00
Forum: Developers
Topic: Broken gradients
Replies: 13
Views: 178

Re: Broken gradients

You can mitigate the amount of banding by rendering at a higher density and then resizing. try convert -density 1200 -units pixelsperinch 74296.eps -resize 25% tmp.jpg If you also want to convert to srgb, then convert -density 1200 -units pixelsperinch -colorspace sRGB 74296.eps -resize 25% tmp.jpg ...
by fmw42
2018-06-18T10:29:36-07:00
Forum: Developers
Topic: Broken gradients
Replies: 13
Views: 178

Re: Broken gradients

When I download your file and examine it (identify -verbose), it shows as PDF, not EPS, even thought it has an EPS suffix. Perhaps that is the issue. If you really have an EPS file, then perhaps zip compress it and upload it again. We need to have a proper input. When I display your image, it has ba...
by fmw42
2018-06-18T10:25:03-07:00
Forum: Developers
Topic: Broken gradients
Replies: 13
Views: 178

Re: Broken gradients

Change your output to PNG or (non-jpeg compressed) TIFF with a Q16 compile of ImageMagick. As snibgo has said JPG is 8-bit and any 8-bit output may show banding in gradients due to the limited color depth.
by fmw42
2018-06-18T10:22:35-07:00
Forum: Users
Topic: TIFF with alpha produces a corrupt output when JPG compressed.
Replies: 3
Views: 44

Re: TIFF with alpha produces a corrupt output when JPG compressed.

It works fine for me also on IM 7.0.8.0 Q16 Mac OSX Sierra. I note that you are using Q8. Perhaps that is the issue. Or perhaps you need to upgrade libtiff?
by fmw42
2018-06-18T10:16:24-07:00
Forum: Users
Topic: How to prevent alpha channel association during conversion?
Replies: 6
Views: 137

Re: How to prevent alpha channel association during conversion?

try -type truecoloralpha when using IM 7
by fmw42
2018-06-18T10:11:35-07:00
Forum: Magick.NET
Topic: Noise removal from scanned document for auto crop
Replies: 4
Views: 82

Re: Noise removal from scanned document for auto crop

In command line mode, you can do it as follows:

Code: Select all

magick form.jpg -morphology close octagon:9 -fuzz 10% -format "%@" info:
1736x2698+30+355

Code: Select all

magick form.jpg -crop 1736x2698+30+355 +repage form_crop.png
by fmw42
2018-06-18T09:56:25-07:00
Forum: Magick.NET
Topic: Error combining jp2 files with magick.net
Replies: 5
Views: 117

Re: Error combining jp2 files with magick.net

ImageMagick does not support multi-channel (TIFF) images, yet, as far as I know, unless the 4th channel is an alpha channel or the channels are CMYK.
by fmw42
2018-06-17T13:15:00-07:00
Forum: Developers
Topic: Broken gradients
Replies: 13
Views: 178

Re: Broken gradients

Please, always provide your IM version and platform when asking questions, since syntax may differ. Also provide your exact command line and if possible your images. See the top-most post in this forum "IMPORTANT: Please Read This FIRST Before Posting" at http://www.imagemagick.org/discourse-server/...
by fmw42
2018-06-17T11:33:45-07:00
Forum: Magick.NET
Topic: Noise removal from scanned document for auto crop
Replies: 4
Views: 82

Re: Noise removal from scanned document for auto crop

Are the red line part of the actual image or added for show? If not, then please provide the original. What is the area of interest for this image?

Please always provide your ImageMagick version and platform!
by fmw42
2018-06-16T18:24:51-07:00
Forum: Bugs
Topic: possible bug deskew:angle string format
Replies: 3
Views: 84

Re: possible bug deskew:angle string format

Thanks. I understand now.
by fmw42
2018-06-16T15:12:55-07:00
Forum: Bugs
Topic: possible bug deskew:angle string format
Replies: 3
Views: 84

possible bug deskew:angle string format

IM 6.9.10.0 Q16 and IM 7.0.8.0 Q16 HDRI Mac OSX Sierra convert -size 200x100 xc:white -background black -rotate 5 -background black -gravity center -extent 300x300 rect.gif convert rect.gif -format "%[deskew:angle]" info: convert: unknown image property "%[deskew:angle]" @ warning/property.c/Interpr...
by fmw42
2018-06-15T09:52:54-07:00
Forum: Users
Topic: How to prevent alpha channel association during conversion?
Replies: 6
Views: 137

Re: How to prevent alpha channel association during conversion?

ImageMagick will change colorspace to gray for those formats that support it if the image is completely gray. But you can often force RGB for certain output types. Try adding -type truecolor to your command if your output is tif.