rmagick

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Rmagic memory use while resizing images

When resizing images memory usage increases by 40 MB to 80ish MB. These are on files that vary in size but none of them are bigger then 300 kb.[详细]

2023-04-01 10:32 分类：问答
RMagick / Imagemagick string conversion UTF-8

I\'m uploading pictures in different sizes with Paperclip. This all works fine. Now I\'m adding a text layer with RMagick (annotate) to each photo for legal copyright info. This works fine too.[详细]

2023-03-31 05:38 分类：问答
no such file to load -- RMagick2.so

I am really struggling to understand the meaning of the error below. I develop on OS X Lion, and I have RMagick installed there, and my code works flawlessly.[详细]

2023-03-30 20:21 分类：问答
Rails: Carrierwave recreate versions does not change old images

My Rails app uses carrierwave to manage image uploads. I have a watermark version of the images on my site. Previously I was overlaying an image on them, like so:[详细]

2023-03-30 15:21 分类：问答
Return array of pixel values using Ruby and Mini Magick (or RMagick?)

I\'m trying to use mini_magick and ruby to get an array of all of the pixel values for an input image.[详细]

2023-03-30 11:59 分类：问答
Rmagick histogram problems

I\'m having problems accessing the hash returned by color_histogram(). There are only black and white pixels in my image, and this is very frustrating.[详细]

2023-03-28 00:53 分类：问答
Paperclip & RMagick - 3-page thumbnail of PDF and renaming

开发者_如何转开发I want to upload pdf file, and create (as a separate file) a thumbnail image with first 3 pages of the pdf aligned horizontally.[详细]

2023-03-25 00:25 分类：问答
RMagick's resample method resize the image, not resample it (the DPI resolution does not change)

I\'m using RMagick’s resample method to change the DPI resolution of an image I have (from 300x300 to 72x72.[详细]

2023-03-24 21:21 分类：问答
RMagick: Convert CMYK EPS to RGB PNG maintaining transparent background

I\'ve spent a long time trying to go from a CMYK EPS to a RGB PNG using RMagick and Rails.Hopefully this will be of use to someone:[详细]

2023-03-22 20:47 分类：问答
crop gif image using libMagick

i am trying to crop a gif image using the libMagick.so library. ./convert --version Version: ImageMagick 6.2.8 03/31/08 Q16 file:/usr/share/ImageMagick-6.2.8/doc/index.html[详细]

2023-03-21 13:53 分类：问答