安装rmagick gem
A new release 2.13.2 of RMagick is now available on github as well as rubygems. This release will fix the installation issues due to ruby 1.9.3 and ImageMagick 6.8+. You can install it the usual way with bundle by adding to Gemfile:
or if you want to be on edge:
You also install it directly by doing:
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使用RMagick,重要会用到两个对象:Image和Draw。
首先给文件增加必要的gem引入
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require ‘rubygems‘require ‘RMagick‘ |
给图片嵌入中文文字
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def t1 img=Magick::Image.read(‘path\read_image1.jpg‘).first #图片路径,用相对路径即可,相对于public来说的 my_text="\251 这是黑马的标致" copyright=Magick::Draw.new copyright.annotate(img,0,0,3,18,my_text) do
#可设字的位置 self.gravity = Magick::CenterGravity self.font=‘public\images\simsun.ttc‘
#这地方必须使用中文字库,才能打中文到图片上。在windows中c:\windows\fonts\simsun.ttc拷到项目的public\images目录下就可以随着项目使用了。另外注意:笔者是使用utf-8字符集来编辑源文件的,如果你不是,请在程序中对汉字转换编码为utf-8 self.pointsize=96
#字体大小 self.font_weight=Magick::BoldWeight self.fill=‘red‘
#字的颜色 self.gravity=Magick::SouthEastGravity self.stroke = "none" end img=img.raise
#浮雕效果 img.write(‘path\img‘) end |
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def test_photo img=Magick::Image.read(‘public\photo\big_image\1\1119218437.jpg‘).first img2=Magick::Image.read(‘public\photo\big_image\2\DSCN4991-thumb.jpg‘).first #版权图片 my_text="\251 黑马的标致" img.composite!(img2, -0,-0, Magick::CopyCompositeOp) #图片叠加 ,CopyCompositeOp是composite的运算之一,还有很多运算方法,实现各种效果,可以在官网找到 http://www.imagemagick.org/RMagick/doc/constants.html#CompositeOperator copyright=Magick::Draw.new copyright.annotate(img,0,0,3,18,my_text) do
#可设字的位置 self.gravity = Magick::CenterGravity self.font=‘public\images\simsun.ttc‘ self.pointsize=96
#字体大小 self.font_weight=Magick::BoldWeight self.fill=‘red‘
#字的颜色 self.gravity=Magick::SouthEastGravity self.stroke = "none" end img=img.raise
#浮雕效果 mark.rotate!(-90) #可旋转 img = img.watermark(mark, 0.15, 0, Magick::EastGravity) #0.15是透明度 img.write(‘public\photo\big_image\1\1119218437-image1_bak.jpg‘) end |
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Rows = 60 Cols = 250 Text = ‘Ruby rocks!‘ anim = Magick::ImageList.new ex = Magick::Image.new(Cols, Rows) text = Magick::Draw.new text.gravity = Magick::CenterGravity text.pointsize = 36 text.font_weight = Magick::BoldWeight text.font_style = Magick::ItalicStyle text.stroke = ‘transparent‘ text.annotate(ex, 0, 0, 2, 2, Text) { self.fill = ‘gray60‘ } anim << ex.copy ex = ex.blur_image(0, 3) anim << ex.copy text.annotate(ex, 0, 0, -1, -1, Text) { self.fill = ‘maroon‘ } anim << ex.copy anim.delay = 100 anim.cur_image.delay = 300 anim.iterations = 0 anim.write(‘shadow.gif‘) exit |
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[1] pry(main)> require "RMagick"=> true[2] pry(main)> img=Magick::Image.read(‘pic7.jpg‘).first => pic7.jpg JPEG
600x800 600x800+0+0
DirectClass 8-bit 121kb[3] pry(main)> c,r=img.columns,img.rows=> [600, 800][4] pry(main)> l=c>r ? c : r=> 800[5] pry(main)> f=640.0/l=> 0.8[6] pry(main)> t1=img.thumbnail(f)=> pic7.jpg JPEG
600x800=>480x640 DirectClass 8-bit[7] pry(main)> t1.write(‘t1.jpg‘)=> pic7.jpg=>t1.jpg JPEG
600x800=>480x640 DirectClass 8-bit 84kb[8] pry(main)> img=nil=> nil |
「ruby」使用rmagick处理图像,布布扣,bubuko.com
原文:http://www.cnblogs.com/lizunicon/p/3675096.html