ImageMagick | 易学教程

ImageMagick Install Windows

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问题 I am trying to install ImageMagick on Windows. What I did is install Windows RailsInstaller created my version and now I need to use ImageMagick but for some reason it doesn't work. I took the binary source code and install and run it from this page but didn't seem to do the trick http://www.imagemagick.org/script/binary-releases.php#windows I also try the following http://www.youtube.com/watch?v=gEWAVlNCKhg but it doesn't work For the first example In cmd all I have to do is the following

Drop shadow on text

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问题 I am looking to add drop shadow to text on an image using PHP. I am aware on how to add text to images and how some libraries allow you to add block shadowing, but I cannot see any which allow you to add a faded drop shadow. Is this possible? 回答1: What you want is Imagick::shadowImage ( float $opacity , float $sigma , int $x , int $y ) Here's an example where I put a drop shadow on some text and then superimpose that on a background image... $background_layer = new Imagick('poster_pic_01.jpg'

How to concatenate icons into a single image with ImageMagick?

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问题 I want to use CSS sprites on a web site instead of separate image files, for a large collection of small icons that are all the same size. How can I concatenate (tile) them into one big image using ImageMagick? 回答1: From the page you linked, 'montage' is the tool you want. It'll take a bunch of images and concatenate/tile them into a single output. Here's an example image I've made before using the tool: (source: davr.org) 回答2: convert works much better than montage. It arranges images

How to batch resize millions of images to fit a max width and height?

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问题 The situation I'm looking for a way to batch-resize approximately 15 million images of different file types to fit a certain bounding box resolution (in this case the image(s) cannot be bigger than 1024*1024), without distorting the image and thus retaining the correct aspect ratio. All files are currently located on a Linux server on which I have sudo access, so if I need to install anything, I'm good to go. Things I've tried After dabbling around with some tools under Windows (Adobe

Properly converting a CMYK image to RGB with RMagick

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问题 I have been using the below to do a color conversion if @image.colorspace == Magick::CMYKColorspace # @image.colorspace #=> CMYKColorspace=12 @image.colorspace = Magick::RGBColorspace @image = @image.negate end It works, approximately, but the color luminosity is off. The fact that I need to negate the image leaves a very bad smell. The documentation mentions using color_profiles, but beyond that I can not find much. I am now trying @image = @image.quantize(16777216, Magick::RGBColorspace)

Set transparent background using ImageMagick and commandline prompt

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问题 Suppose you have any image (PNG or JPG). This image has a white background and I need to make this background transparent. I have tried with these examples: convert original.png -background none transparent.png convert original.png -background white -flatten -alpha off transparent.png but with no desirable results. How can I make it? IMPORTANT: Using convert command-line. 回答1: I am using ImageMagick 6.6.9-7 on Ubuntu 12.04. What worked for me was the following: convert test.png -transparent

Convert HTML to an image in Python [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I want to convert following HTML to PNG image in Python. <html> <b>Bold text</b> </html> This HTML is, of course, an example. I have tried 'pisa' but it converts html to PDF, not to image. I can convert HTML to PDF and then convert PDF to PNG, but I was wondering if there is any direct solution (i.e HTML to PNG).

Paperclip::NotIdentifiedByImageMagickError in Spree::Admin::ImagesController#create

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问题 I am attempting to setup Spree for the first time. Everything was going well until I hit the image upload. I have installed Imageamgick using homebrew on Mac OSX Mountain Lion. Uploading any image gives me the following error. Paperclip::NotIdentifiedByImageMagickError in Spree::Admin::ImagesController#create Command :: identify -format %wx%h :file [paperclip] An error was received while processing: #<Paperclip::NotIdentifiedByImageMagickError: /var/folders/fq/9g_6hmg513g6137rb6sbghw00000gn/T

ImageMagick Command-Line Option Order (and Categories of Command-Line Parameters)

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问题 My supervisor has asked me to convert the parts of our Perl scripts that use PerlMagick to instead pipe and use the command line version of ImageMagick (for various unrelated reasons). Using the our existing interface (crop, scale, save, etc) I'm building up a list of operations the user wants to perform on an image, constructing the statement to pipe and then executing it. What I would like to know is: Are convert operations performed from left to right? ie the order I pass them What happens

轻松搭建基于 Serverless 的文档图片在线转换服务

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