Search found 10842 matches

by snibgo
2018-11-17T05:19:36-07:00
Forum: Users
Topic: pdf to jpg with big file
Replies: 8
Views: 105

Re: pdf to jpg with big file

I use exiftool for that, eg:

Code: Select all

f:\web\im>exiftool -args -PageCount mypdf.pdf

-PageCount=12
by snibgo
2018-11-17T05:15:23-07:00
Forum: Users
Topic: Move Masked composition around over larger canvas
Replies: 2
Views: 38

Re: Move Masked composition around over larger canvas

You have a profile_pic that you make partially transparent with a mask, and composite over that with a mask_overlay. That gives an image that you want to compose somewhere over the input, correct? Then insert "-geometry +40+50" or whatever immediately before "+swap". If that doesn't do what you want...
by snibgo
2018-11-17T04:35:26-07:00
Forum: Users
Topic: pdf to jpg with big file
Replies: 8
Views: 105

Re: pdf to jpg with big file

"-density" is a setting that affects the rasterisation of vector elements in the PDF, the process that changes lines or text into pixels. The unit is pixels per inch. If you double the number, you get twice as many pixels in width and in height. "-trim" crops the image so that no edge has a single c...
by snibgo
2018-11-17T04:01:50-07:00
Forum: Users
Topic: pdf to jpg with big file
Replies: 8
Views: 105

Re: pdf to jpg with big file

I want to turn my 1.pdf into 1-large.jpg in one go, without having to rename my .jpg. Is it possible? You can rasterize the PDF into images, one image per page. Then append those images vertically. Is that what you mean? convert input.pdf -append out.jpg Or "+append" will append them horizontally. ...
by snibgo
2018-11-17T03:26:15-07:00
Forum: Users
Topic: pdf to jpg with big file
Replies: 8
Views: 105

Re: pdf to jpg with big file

My pdf has many pages (250 pages) but after the transformation, I find only 75 pages. Did you get an error message? Perhaps you ran out of memory. How many pixels are in each page? It may be better to convert your PDF in sections, eg "./pdf/1.pdf[0-9]" then "./pdf/1.pdf[10-19]" etc. I want to turn ...
by snibgo
2018-11-17T03:13:12-07:00
Forum: Digital Image Processing
Topic: 3 Implementations for Adaptive Gamma Correction
Replies: 6
Views: 397

Re: 3 Implementations for Adaptive Gamma Correction

My result above reduces contrast in the light helmets and mudguards, burning them out. The Gang Cao paper also has this, even with different alphas. That result is unacceptable (to me). Following Gang Cao, in my command we can negate the input and output, which gives a stretching in the highlights (...
by snibgo
2018-11-17T02:07:18-07:00
Forum: Digital Image Processing
Topic: 3 Implementations for Adaptive Gamma Correction
Replies: 6
Views: 397

Re: 3 Implementations for Adaptive Gamma Correction

A non-weighted AGC, as given in the "Contrast Enhancement of Brightness-Distorted Images by Improved Adaptive Gamma Correction, Gang Cao" paper (Windows BAT syntax): %IM7DEV%magick ^ %SRC% ^ +write mpr:INP ^ -process 'mkhisto cumul norm verbose' ^ -negate ^ ( +clone ^ -sparse-color bilinear 0,0,Blac...
by snibgo
2018-11-16T15:30:48-07:00
Forum: Magick.NET
Topic: writing area on big picture without loading the image into memory
Replies: 1
Views: 37

Re: writing area on big picture without loading the image into memory

What are these huge images? IM can do the job using disk to store the pixel cache. Of course, you need a large disk, many TB. IM can do it without loading the image into memory provided the input is mpc format. But mpc is an internal IM format, so that transfers the problem: converting to and from m...
by snibgo
2018-11-16T13:43:22-07:00
Forum: Digital Image Processing
Topic: 3 Implementations for Adaptive Gamma Correction
Replies: 6
Views: 397

Re: 3 Implementations for Adaptive Gamma Correction

Thank you for the contribution and the references. I've only had a brief look at them, but they seem interesting, and potentially useful. To me, there are two different uses for such techniques: 1. To present an overview of where my photo has detail, and where it doesn't. This is for information, no...
by snibgo
2018-11-16T08:53:07-07:00
Forum: Users
Topic: compare subimage-search returns me different start-coordinates for the found image
Replies: 4
Views: 70

Re: compare subimage-search returns me different start-coordinates for the found image

"-limit" is documented at http://www.imagemagick.org/script/command-line-options.php#limit Multithreading in IM is documented at http://www.imagemagick.org/script/architecture.php#threads See also policy.xml and MAGICK_THREAD_LIMIT in http://www.imagemagick.org/script/resources.php Internally, most ...
by snibgo
2018-11-16T07:16:16-07:00
Forum: Users
Topic: crop image only in height
Replies: 5
Views: 102

Re: crop image only in height

razor74 wrote:Actually I trim the image first and then I do the crop
So I expect you also "+repage" after the trim? Please show the exact command or series of commands you use. Otherwise we can only guess.

Inserting "+write info:" at various stages in your command can help with understanding what is happening.
by snibgo
2018-11-16T06:27:17-07:00
Forum: Users
Topic: Trim in all borders
Replies: 2
Views: 70

Re: Trim in all borders

There is no example, or question.
by snibgo
2018-11-16T06:24:26-07:00
Forum: Developers
Topic: are there any dependencies with linux kernel?
Replies: 2
Views: 69

Re: are there any dependencies with linux kernel?

Are you serious? You installed IM v6.4.0? Why?
by snibgo
2018-11-16T06:23:38-07:00
Forum: Users
Topic: crop image only in height
Replies: 5
Views: 102

Re: crop image only in height

Please tell us the version of IM you are using, and on what platform, and please paste a link to your input file.
by snibgo
2018-11-16T06:22:09-07:00
Forum: Users
Topic: compare subimage-search returns me different start-coordinates for the found image
Replies: 4
Views: 70

Re: compare subimage-search returns me different start-coordinates for the found image

Your posted A_threshold_90.png and A_threshold_90.png are 1040x390, but your subimage whiteLine1293x1pixel.png is 1293x1 which is wider, so a subimage search will fail. I guess you linked to the wrong inputs, or a web hoster has downsized them. In both your searches, IM has found a perfect match. Wh...