imagemagick基本操作

imagemagick基本操作

• 查看图像信息

  identify pic

• 转换图像的格式

  convert pic.png pic.jpeg

  convert *.png pic.jpg: 自动编号

• 图像尺寸相关操作

  convert -resize 200%% pic.png pic-resize.png
  convert pic.png -resize 200%% pic-resize.png
  convert -resize 200%%x50%% pic.png pic-resize.png
  
  # !, >, <, @
  # 可以只对width or height进行调整
  convert -resize 100 pic pic-resize
  convert -resize x200 pic pic-resize
  convert -resize 100> pic pic-resize
  convert -resize x200> pic pic-resize
  convert -resize 10000@ pic pic-resize
  convert -resize -strip pic pic-resize
  convert -resize 64x64\! pic pic-resize
  
  

• 图像裁剪

  convert pic -crop [width]x[height]+[x]+[y] pic-crop
  convert pic -crop [width]x[height] pic-crop	# several parts
  
  convert pic -gravity center -crop [width]x[height]+[x]+[y] pic-crop
  # -gravity 用于指定原点位置 north, south, east, west, center, northeast, northwest, southeast, southwest
  

• 降低图像质量

  convert -quality [1-100] pic pic-quality
  convert -resize 64x64 -quality 100 -strip pic pic-resize
  

• 添加边框

  convert -bordercolor rgb(1,2,3) -border 5%%x10%% pic pic-border
  convert -bordercolor red -border 100x200 pic pic-border
  

• 图像反色

  convert -negate pic pic-negate
  

• 图像灰度系数

  convert -gamma 0.8,1.5,2.0 pic pic-gamma
  # 0.8<gamma<2.3
  

• 彩色转黑白

  convert -monochrome pic pic-momochrome
  

• 生成ico文件

  convert -background none pic pic-ico
  

• 截图

  import shot
  import -pause time -frame shot
  import -rotate degrees -pause time -frame shot
  import -pause time -window root shot
  

• 显示图片

  display pic
  display -delay time *
  display *.png
  
  # some shortcuts
  # <space>: next picture
  # <backspace>: precious picture
  # h: horizental flip
  # v: vertical flip
  # /: rotate clockwise
  # \: rotate countclockwise
  # >: zoom in
  # <: zoom out
  # F7: blur
  # Alt+s: wirl
  # Ctrl+s: save as
  # Ctrl+d: delete pic
  # q
  

• 图像翻转

  convert -flip pic pic-flip # horizental
  convert -flop pic pic-flop # verticle
  

• 图像加噪声

  convert -noise 3 pic pic-noise
  

• 图像转油画

  convert -paint 5 pic pic-paint
  

• 碳笔效果

  convert -charcoal 2 pic pic-charcoal
  

• 毛玻璃效果

  convert -spread 30 pic pic-spread
  

• 漩涡效果

  convert -swirl 67 pic pic-swirl
  

• 凸起效果

  convert -raise 5x5 pic pic-raise: embossing
  convert +raise 5x5 pic pic+raise: sunken