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ImageMagick常用指令详解
Imagemagick常用指令
(ImageMagick--蓝天白云)
(ImageMagick官网)
(其他比较有价值的IM参考)
convert 转换图像格式和大小，模糊，裁剪，驱除污点，抖动，临近，图片上画图片，加入新图片，生成缩略图等。
identify 描述一个或较多图像文件的格式和特性。
composite 根据一个图片或多个图片组合生成图片
举个例子
convert +profile ‘*‘ [src]{file}.{ext} -quality 80 -resize ‘280x140^>‘ -gravity Center -crop 280x140+0+0 +repage [out]{file}_280x140.{ext}
把一张图片按80的质量去压缩(jpg的压缩参数),同时按图片比例非强制缩放成不超过280x140的图片.居中裁剪280x140,去掉图片裁减后的空白和图片exif信息,通常这种指令是为了保证图片大小正好为280x140
下面对各个指令的含义简要说明
-quality 图片质量,jpg默认99,png默认75
-resize
100x100 高度和宽度比例保留最高值，高比不变
100x100^ 高度和宽度比例保留最低值，宽高比不变
100x100! 宽度和高度强制转换，忽视宽高比
100x100> 更改长宽，当图片长或宽超过规定的尺寸
100x100< 更改长宽 只有当图片长宽都超过规定的尺寸
100x100^> 更改长宽，当图片长或宽超过规定的尺寸。高度和宽度比例保留最低值
100x100^< 更改长宽，只有当图片长宽都超过规定的尺寸。高度和宽度比例保留最低值
100 按指定的宽度缩放，保持宽高比例
x100 按指定高度缩放，保持宽高比
-gravity NorthWest, North, NorthEast, West, Center, East, SouthWest, South, SouthEast截取用的定位指令,定位截取区域在图片中的方位
-crop 200x200+0+0 截取用的截取指令 ,在用定位指令后,按后两位的偏移值偏移截取范围左上角的像素后,再按前两位的数值,从左上角开始截取相应大小的图片
+repage 去掉图片裁减后的空白
-dissolve 30 设定组合图片透明度dissolve示例
+/-profile * 去掉/添加图片exif信息
下面记录下一些比较复杂一点的指令:
convert +profile ‘*‘ [src]{file}.{ext} -quality 90 -resize ‘700>‘ /data/tony/watermark_1.png -gravity southeast -compose Dissolve -composite [out]{file}_1024x1024.{ext}
convert +profile ‘*‘ [src]{file}.{ext} /data/watermark_1.png -gravity southeast -geometry +10+10 -composite [src]{file}.{ext}
convert +profile ‘*‘ [src]{file}.{ext} -coalesce -resize ‘950x135>‘ [out]{file}_950x135.{ext}
convert +profile ‘*‘ [src]{file}.{ext} -resize ‘650x500>‘ miff:- | composite +profile ‘*‘ -dissolve 30 -gravity southeast /data/tony/watermark_1.png - [out]{file}_650x500.{ext}
convert [src]{file}.{ext} -quality 80 -resize ‘190>‘ -background white -gravity center -extent 190x +repage [out]{file}_width190.{ext}
【/bin/sh^M: bad interpreter: 没有那个文件或目录】
vim filename
然后用命令
:set ff? #可以看到dos或unix的字样. 如果的确是dos格式的。
然后用
:set ff=unix #把它强制为unix格式的, 然后存盘退出。
###############################################
shell 除法计算
shell计算中使用除法，基本默认上都是整除。
比如：
num1=2
num2=3
num3=`expr $num1 / $num2`
这个时候num3=0 ,是因为是因为expr不支持浮点除法
解决的方法：
num3=`echo "scale=2; $num1/$num2" | bc`
使用bc工具，sclae控制小数点后保留几位
还有一种方法
awk ‘BEGIN{printf "%.2f\n",’$num1‘/’$num2‘}‘
如果用百分比表示
awk ‘BEGIN{printf "%.2f%\n",(’$num1‘/’$num2‘)*100}‘
##############################################
convert +profile ‘*‘ -size 950x135 xc:#ffffff [src]{file}.{ext} -resize 950x135 -gravity center -compose Src-over -composite [out]{file}_950x135.{ext}
解读：该指令会把gif的动态图拆分成好几张图，
-coalesce
完全定义一个GIF动画序列的每一帧的外观，形成“电影胶片”动画
根据它的-处置元数据覆盖各图像中的图像序列，以再现一个动画中的动画序列中的每个点的外观。有的图片应该是相同的大小，并且为动画继续如预期般GIF动画的工作分配适当的GIF处理设置。这样的帧更容易查看和比高度优化的GIF图像叠加处理。
该动画可以重新优化使用层法“优化”处理后，虽然没有保证恢复的GIF动画优化是比原来更好。
##################################################
gif拿到的只是最后一帧的数据,所以gif的图片在width和height值上有出入
convert +profile ‘*‘ tly2.gif -resize "600>" tly2_600.gif
C:\>identify tly2.gif
tly2.gif[0] GIF 341x186 341x186+0+0 8-bit sRGB 256c 191KB 0.000u 0:00.003
tly2.gif[1] GIF 194x173 341x186+128+13 8-bit sRGB 256c 191KB 0.000u 0:00.010
tly2.gif[2] GIF 192x175 341x186+130+11 8-bit sRGB 256c 191KB 0.000u 0:00.013
tly2.gif[3] GIF 80x177 341x186+131+9 8-bit sRGB 256c 191KB 0.000u 0:00.016
...
tly2.gif[30] GIF 164x175 341x186+122+11 8-bit sRGB 256c 191KB 0.000u 0:00.094
tly2.gif[31] GIF 145x172 341x186+122+14 8-bit sRGB 256c 191KB 0.000u 0:00.097
tly2.gif[32] GIF 195x167 341x186+122+19 8-bit sRGB 256c 191KB 0.000u 0:00.100
tly2.gif[33] GIF 196x174 341x186+121+12 8-bit sRGB 256c 191KB 0.000u 0:00.105
一、crop_center.sh
如果原图宽>高:按宽*size/高缩放; 如果原图宽<高:按高*size/宽缩放; 并居中裁剪size*size
#!/bin/bashexport PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbinfilename=$1filename2=$2size=$3resize="70"wh=($(/usr/local/bin/identify -format "%w %h " $1))if [ ${wh[0]} -gt ${wh[1]} ]thenresize=$(echo "${wh[0]}*$size/${wh[1]}+1" | bc)elseresize=$(echo "${wh[1]}*$size/${wh[0]}+1" | bc)fi/usr/local/bin/convert +profile "*" -quality 75 -resize ${resize}x${resize} $filename $filename2/usr/local/bin/convert +profile "*" -gravity Center -crop ${size}x${size}+0+0 $filename2 $filename2使用范例：/usr/local/bin/crop_center.sh [src]{file}.{ext} [out]{file}_small.{ext} 100
二、tony-convert-1.sh
原图按1024x1024>等比缩放，并打水印于右下角；如果宽高都小于300，则直接使用原图
#!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 2 ] ; then echo "Usage: tony-convert-1.sh [source path] [dest path]" echo "Example: ./tony-convert-1.sh src/1234.jpg out/1234_100x200.jpg" exit 1 fisrcFile="$1"dstFile="$2"index1=`expr index "${srcFile}" /`index2=`expr index "${srcFile}" .`file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``#identify image numpicCount=`/usr/local/sbin/bin/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/sbin/bin/bin/identify -format "%wx%h %f\n" ${srcFile}`index1=`expr index "${sizeMatrix}" x`width=`expr substr "${sizeMatrix}" 1 \`expr ${index1} - 1\``echo width: ${width}index2=`expr \`expr index "${sizeMatrix}" ‘ ‘\` - ${index1} - 1`height=`expr substr "${sizeMatrix}" \`expr ${index1} + 1\` ${index2}`echo height: ${height}if [ ${width} -lt 300 ] ; then if [ ${height} -lt 300 ] ; then echo Image size less than 300x300 cp ${srcFile} ${dstFile} exit 0 fifiif [ `echo ${ext}|tr ‘a-z‘ ‘A-Z‘` = "BMP" ] ; then index1=`expr index "${dstFile}" .` dstFile=`expr substr "${dstFile}" 1 \`expr ${index1} - 1\``.jpg fi#convert image/usr/local/sbin/bin/bin/convert +profile ‘*‘ ${srcFile} -resize ‘1024x1024>‘ /data/tony/watermark_1.png -gravity southeast -compose Dissolve -composite ${dstFile}使用范例:/usr/local/sbin/bin/bin/tony-convert-1.sh [src]{file}.{ext} [out]{file}_1024x1024.{ext}
三、resizeByWidthOrHeight.sh:
宽大于高时：定宽等比缩放 高自适应；宽小于高时：定高等比缩放,宽自适应
#!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 3 ] ; then echo "Usage: resizeByWidthOrHeight.sh [source path] [widthxheigth] [dest path]" echo "Example: ./resizeByWidthOrHeight.sh src/1234.jpg 150x150 out/1234_150x2150.jpg" exit 1 fisrcFile="$1"dstFile="$3"destSize="$2"destWidth=${destSize%x*}destHeight=${destSize#*x}echo "destSize: ${destWidth}x${destHeight}"index1=`expr index "${srcFile}" /`echo "index1: $index1"index2=`expr index "${srcFile}" .`echo "index2: $index2"file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``echo "file: $file"ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``echo "ext: $ext"#identify image numpicCount=`/usr/local/sbin/bin/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/sbin/bin/bin/identify -format "%wx%h" ${srcFile}`echo "index1: $index1"width=${sizeMatrix%x*}echo width: ${width}height=${sizeMatrix#*x}echo height: ${height}newSize="${destWidth}x${destHeight}"# width < heightif [ ${width} -lt ${height} ] ; then newSize="‘x${destHeight}>‘"else newSize="‘${destWidth}>‘"fiecho "newSize: ${newSize}"# resizeresizeCmd="/usr/local/sbin/bin/bin/convert ${srcFile} -quality 100 -resize ${newSize} ${dstFile}"echo "resizeCmd: ${resizeCmd}"eval "${resizeCmd}"使用范例：/usr/local/sbin/bin/bin/resizeByWidthOrHeight.sh [src]{file}.{ext} 594x395 [out]{file}_594x395.{ext}
四、tony-convert-2.sh:
缩放规则：
目标图宽<高时:定高等比压缩，宽自适应;
原图宽高比>目标图宽高比时:定高等比压缩，宽自适应;
否则：定宽等比压缩，高自适应
裁剪规则：默认居中，若目标图宽>=高，则居左上角
#!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 3 ] ; then echo "Usage: tony-convert-2.sh [source path] [widthxheigth] [dest path]" echo "Example: ./tony-convert-2.sh src/1234.jpg 150x150 out/1234_150x150.jpg" exit 1 fisrcFile="$1"dstFile="$3"destSize="$2"destWidth=${destSize%x*}destHeight=${destSize#*x}echo "destSize: ${destWidth}x${destHeight}"index1=`expr index "${srcFile}" /`echo "index1: $index1"index2=`expr index "${srcFile}" .`echo "index2: $index2"file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``echo "file: $file"ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``echo "ext: $ext"#identify image numpicCount=`/usr/local/sbin/bin/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/sbin/bin/bin/identify -format "%wx%h" ${srcFile}`echo "index1: $index1"width=${sizeMatrix%x*}echo width: ${width}height=${sizeMatrix#*x}echo height: ${height}if [ `echo ${ext}|tr ‘a-z‘ ‘A-Z‘` = "BMP" ] ; then index1=`expr index "${dstFile}" .` dstFile=`expr substr "${dstFile}" 1 \`expr ${index1} - 1\``.jpg fisrcRate=$(echo "scale=9; $width*1.0 / $height*1.0" | bc)destRate=$(echo "scale=9; $destWidth*1.0 / $destHeight*1.0" | bc)echo "srcRate: ${srcRate}"echo "destRate: ${destRate}"resizeCmd="/usr/local/sbin/bin/bin/convert +profile ‘*‘ ${srcFile} -resize ‘${destWidth}x${destHeight}^>‘ -grAvity Center -crop ${destWidth}x${destHeight}+0+0 +repage ${dstFile}"newSize="${destWidth}x${destHeight}"# width < heightif [ ${destWidth} -lt ${destHeight} ] ; then newSize="x${destHeight}>"elif [ `echo "${srcRate} > ${destRate}" | bc` -eq 1 ] ; then newSize="x${destHeight}>"else newSize="${destWidth}>"figrAvityWay="Center"# width < heightif [ ${destWidth} -ge ${destHeight} ] ; then grAvityWay="NorthWest"fi# resizeresizeCmd="/usr/local/sbin/bin/bin/convert +profile ‘*‘ ${srcFile} -resize ‘${newSize}‘ -grAvity ${grAvityWay} -crop ${destWidth}x${destHeight}+0+0 +repage ${dstFile}"echo "resizeCmd: ${resizeCmd}"eval "${resizeCmd}"使用范例:/usr/local/sbin/bin/bin/tony-convert-2.sh [src]{file}.{ext} 170x105 [out]{file}_170x105.{ext}
五、tony-convert-3.sh:
以destWidth表示目的图宽，destHeight表示目的图高，persentSize=destWidth/destHeight表示目的图宽高比;
当原图宽<destWidth且高<destHeight时，不截取，直接上传;
当原图宽<destWidth,高>destHeight时，以原图宽为宽居中裁剪 竖图;
当原图宽>destWidth,高<destHeight时，以原图高为高居中裁剪 横图;
当原图宽>destWidth,高>destHeight,
{
当原图宽/高>persentSize时，将原图高压缩为destHeight居中裁剪
当原图宽/高<persentSize时，将原图宽压缩为destWidth居中裁剪
}
!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 3 ] ; then echo "Usage: tony-convert-3.sh [source path] [widthxheigth] [dest path]" echo "Example: ./tony-convert-3.sh src/1234.jpg 750x375 out/1234_750x375.jpg" exit 1 fisrcFile="$1"dstFile="$3"destSize="$2"destWidth=${destSize%x*}destHeight=${destSize#*x}echo "destSize: ${destWidth}x${destHeight}"index1=`expr index "${srcFile}" /`echo "index1: $index1"index2=`expr index "${srcFile}" .`echo "index2: $index2"file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``echo "file: $file"ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``echo "ext: $ext"#identify image numpicCount=`/usr/local/sbin/bin/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/sbin/bin/bin/identify -format "%wx%h" ${srcFile}`echo "index1: $index1"width=${sizeMatrix%x*}echo width: ${width}height=${sizeMatrix#*x}echo height: ${height}#if [ `echo ${ext}|tr ‘a-z‘ ‘A-Z‘` = "BMP" ] ; then #index1=`expr index "${dstFile}" .` #dstFile=`expr substr "${dstFile}" 1 \`expr ${index1} - 1\``.jpg #fi#newSize="${destWidth}x${destHeight}"heightPadding="0"widthPadding="0"persentSize=`echo "scale=4; ${destWidth}/${destHeight}" | bc`echo "persentSize: ${persentSize}"# qualityqualityCmd="/usr/local/sbin/bin/bin/convert ${srcFile} -quality 90 ${dstFile}"echo "qualityCmd: ${qualityCmd}"eval "${qualityCmd}"# width > 750 && height <375 hengTuif [ ${width} -gt ${destWidth} ] && [ ${height} -lt ${destHeight} ] ; then heightPadding=$[ ${destHeight}/2-${height}/2] echo heightPadding: ${heightPadding} flag=0# width < 750 && height >375 shuTuelif [ ${width} -lt ${destWidth} ] && [ ${height} -gt ${destHeight} ] ; then widthPadding=$[ ${destWidth}/2-${width}/2 ] echo widthPadding: ${widthPadding} flag=0# width > 750 && height >375 resize and cropelif [ ${width} -gt ${destWidth} ] && [ ${height} -gt ${destHeight} ] && [ $ [ ${width}/${height} ]>${persentSize} ] ; then echo "resize by src‘s height then crop" newSize="‘x${destHeight}>‘" flag=1elif [ ${width} -gt ${destWidth} ] && [ ${height} -gt ${destHeight} ] && [ $[ ${width}/${height} ]<${persentSize} ] ; then echo "resize by src‘s width then crop" newSize="‘${destWidth}>‘" flag=1fi echo "newSize: ${newSize}"# resizeif [ ${flag} -eq 1 ] ; then resizeCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -resize ${newSize} ${dstFile}" echo "resizeCmd: ${resizeCmd}" eval "${resizeCmd}" cropCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -gravity Center -crop ${destSize}+0+0 +repage ${dstFile}"else echo "only crop pic" cropCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -gravity Center -crop ${destSize}+${widthPadding}+${heightPadding} +repage ${dstFile}"fi# cropecho "cropCmd: ${cropCmd}"eval "${cropCmd}"使用范例：/usr/local/sbin/bin/bin/tony-convert-3.sh [src]{file}.{ext} 750x375 [out]{file}_750x375.{ext}
六、tony-convert-3_bg.sh:
以destWidth表示目的图宽，destHeight表示目的图高，
当原图宽<destWidth且高<destHeight时，不截取，直接上传;
当原图宽<destWidth,高>destHeight时，以原图宽为宽居中裁剪 树图;
当原图宽>destWidth,高<destHeight时，以原图高为高居中裁剪 横图;
当原图宽>destWidth,高>destHeight,
{
当原图宽>高时，将原图高压缩为destHeight居中裁剪
当原图宽<高时，将原图宽压缩为destWidth居中裁剪
}
所有情况都要居中补白
!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 3 ] ; then echo "Usage: tony-convert-3_bg.sh [source path] [widthxheigth] [dest path]" echo "Example: ./tony-convert-3_bg.sh src/1234.jpg 750x375 out/1234_750x375.jpg" exit 1 fisrcFile="$1"dstFile="$3"destSize="$2"destWidth=${destSize%x*}destHeight=${destSize#*x}echo "destSize: ${destWidth}x${destHeight}"index1=`expr index "${srcFile}" /`echo "index1: $index1"index2=`expr index "${srcFile}" .`echo "index2: $index2"file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``echo "file: $file"ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``echo "ext: $ext"#identify image numpicCount=`/usr/local/sbin/bin/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/sbin/bin/bin/identify -format "%wx%h" ${srcFile}`echo "index1: $index1"width=${sizeMatrix%x*}echo width: ${width}height=${sizeMatrix#*x}echo height: ${height}# qualityqualityCmd="/usr/local/sbin/bin/bin/convert ${srcFile} -quality 90 ${dstFile}"echo "qualityCmd: ${qualityCmd}"eval "${qualityCmd}"# width > 750 && height <375 hengTuflag=0if [ ${width} -gt ${destWidth} ] && [ ${height} -lt ${destHeight} ] ; then heightPadding=$[ ${destHeight}/2-${height}/2] echo heightPadding: ${heightPadding} flag=0# width < 750 && height >375 shuTuelif [ ${width} -lt ${destWidth} ] && [ ${height} -gt ${destHeight} ] ; then widthPadding=$[ ${destWidth}/2-${width}/2 ] echo widthPadding: ${widthPadding} flag=0# width > 750 && height >375 resize and cropelif [ ${width} -gt ${destWidth} ] && [ ${height} -gt ${destHeight} ] && [ ${width} -gt ${height} ] ; then echo "resize by src‘s height then crop" newSize="‘x${destHeight}>‘" flag=1elif [ ${width} -gt ${destWidth} ] && [ ${height} -gt ${destHeight} ] && [ ${width} -lt ${height} ] ; then echo "resize by src‘s width then crop" newSize="‘${destWidth}>‘" flag=1fi echo "newSize: ${newSize}"# resizeif [ ${flag} -eq 1 ] ; then resizeCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -resize ${newSize} ${dstFile}" echo "resizeCmd: ${resizeCmd}" eval "${resizeCmd}" cropCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -gravity Center -crop ${destSize}+0+0 +repage -background white -compose Copy -gravity center -extent ${destSize} ${dstFile}"else echo "only crop pic" cropCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -gravity Center -crop ${destSize}+0+0 +repage -background white -compose Copy -gravity center -extent ${destSize} ${dstFile}"fi# cropecho "cropCmd: ${cropCmd}"eval "${cropCmd}"使用范例：【240x240大小，背景补白，1PX灰色边框】 /usr/local/sbin/bin/bin/tony-convert-3_bg.sh [src]{file}.{ext} 240x240 [out]{file}_240x240.{ext}
七、tony-convert-4.sh:
原图宽大于destWidth:
{
高>destHeight时：定宽等比缩放 以原图高为高居中裁剪；
否则：从左上角裁剪
}
原图宽小于destWidth:
{
高>destHeight时：以原图高为高居中裁剪；
否则：从左上角裁剪
}
#!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 3 ] ; then echo "Usage: tony-convert-4.sh [source path] [widthxheigth] [dest path]" echo "Example: ./tony-convert-4.sh src/1234.jpg 150x150 out/1234_150x150.jpg" exit 1 fisrcFile="$1"dstFile="$3"destSize="$2"destWidth=${destSize%x*}destHeight=${destSize#*x}echo "destSize: ${destWidth}x${destHeight}"index1=`expr index "${srcFile}" /`echo "index1: $index1"index2=`expr index "${srcFile}" .`echo "index2: $index2"file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``echo "file: $file"ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``echo "ext: $ext"#identify image numpicCount=`/usr/local/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/bin/identify -format "%wx%h" ${srcFile}`echo "index1: $index1"width=${sizeMatrix%x*}echo width: ${width}height=${sizeMatrix#*x}echo height: ${height}#if [ `echo ${ext}|tr ‘a-z‘ ‘A-Z‘` = "BMP" ] ; then #index1=`expr index "${dstFile}" .` #dstFile=`expr substr "${dstFile}" 1 \`expr ${index1} - 1\``.jpg #finewSize="${destWidth}x${destHeight}"# width < heightif [ ${width} -gt ${destWidth} ] ; then newSize="‘${destWidth}>‘" if [ ${height} -gt ${destHeight}] ; then heihgtPadding="‘${destHeight}/2‘" else heihgtPadding="‘0‘" fielse newSize="‘${width}>‘" if [ ${height} -gt ${destHeight}] ; then heihgtPadding="‘${destHeight}/2‘" else heihgtPadding="‘0‘" fifiecho "newSize: ${newSize}"# resizeresizeCmd="/usr/local/sbin/bin/bin/convert ${srcFile} -quality 90 -resize ${newSize} ${dstFile}"echo "resizeCmd: ${resizeCmd}"eval "${resizeCmd}"# add white groundaddWhiteCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -crop ${destSize}+0-${heihgtPadding} +repage ${dstFile}"echo "addWhiteCmd: ${addWhiteCmd}"eval "${addWhiteCmd}"使用范例：【160*120裁剪或居中加水印】/usr/local/sbin/bin/bin/tony-convert-4.sh [src]{file}.{ext} 160x120 [out]{file}_160.{ext}
八、tony-convert-5.sh:
宽大于高时：定宽等比缩放 高自适应；
宽小于高时：定高等比缩放,宽自适应;
并居中补白
#!/bin/sh# we have 2 arguments: source file name and dest file nameif [ $# -ne 3 ] ; then echo "Usage: tony-convert-5.sh [source path] [widthxheigth] [dest path]" echo "Example: ./tony-convert-5.sh src/1234.jpg 150x150 out/1234_150x2150.jpg" exit 1 fisrcFile="$1"dstFile="$3"destSize="$2"destWidth=${destSize%x*}destHeight=${destSize#*x}echo "destSize: ${destWidth}x${destHeight}"index1=`expr index "${srcFile}" /`echo "index1: $index1"index2=`expr index "${srcFile}" .`echo "index2: $index2"file=`expr substr "${srcFile}" \`expr ${index1} + 1\` \`expr ${index2} - ${index1} - 1\``echo "file: $file"ext=`expr substr "${srcFile}" \`expr ${index2} + 1\` \`expr length "${srcFile}" - ${index2}\``echo "ext: $ext"#identify image numpicCount=`/usr/local/bin/identify ${srcFile}|grep -c "${file}.${ext}"`echo animate pictures: ${picCount}if [ ${picCount} -gt 1 ] ; then echo "No handle for animate pictures" cp ${srcFile} ${dstFile} exit 0 fi#identify image sizesizeMatrix=`/usr/local/bin/identify -format "%wx%h" ${srcFile}`echo "index1: $index1"width=${sizeMatrix%x*}echo width: ${width}height=${sizeMatrix#*x}echo height: ${height}#if [ ${width} -lt 300 ] ; then# if [ ${height} -lt 300 ] ; then# echo Image size less than 300x300# cp ${srcFile} ${dstFile}# exit 0# fi#fiif [ `echo ${ext}|tr ‘a-z‘ ‘A-Z‘` = "BMP" ] ; then index1=`expr index "${dstFile}" .` dstFile=`expr substr "${dstFile}" 1 \`expr ${index1} - 1\``.jpg finewSize="${destWidth}x${destHeight}"# width < heightif [ ${width} -lt ${height} ] ; then newSize="‘x${destHeight}>‘"else newSize="‘${destWidth}>‘"fiecho "newSize: ${newSize}"# resizeresizeCmd="/usr/local/sbin/bin/bin/convert ${srcFile} -quality 80 -resize ${newSize} ${dstFile}"echo "resizeCmd: ${resizeCmd}"eval "${resizeCmd}"# add white groundaddWhiteCmd="/usr/local/sbin/bin/bin/convert ${dstFile} -background white -gravity center -extent ${destSize} -gravity Center -crop ${destSize}+0+0 +repage ${dstFile}"echo "addWhiteCmd: ${addWhiteCmd}"eval "${addWhiteCmd}"使用范例：【正方形图】/usr/local/sbin/bin/bin/tony-convert-5.sh [src]{file}.{ext} 90x90 [out]{file}_90x90.{ext}
ImageMagick常用指令详解