Yim*_*ong 6 image-manipulation imagemagick
我有一个logo.png尺寸为image的图像720x720,我希望将其拉伸或挤压以适合整个高度或宽度,并保留宽高比,并以一个有边界的矩形居中,top-left: 32,432并bottom-right: 607,919在另一个background.png尺寸为size的图像中居中640x960。
因此,对于上述示例,logo.png将其调整为488x488并定位在top-left: 76,432。
但是我不需要计算488x488或76,432,只想使用上面的top-left和bottom-right指定符,即让ImageMagick弄清楚。
ImageMagick可以做这样的事情吗?如果不能单独使用,是否有使用convert其他方法的脚本解决方案?
希望更简单的版本
我认为这仍然会产生相同的结果,但更简单:
#!/bin/bash
# Make initial images
convert -size 720x720! gradient:red-yellow -fill white -gravity center -pointsize 72 -annotate 0 "logo" logo.png
convert -size 640x960! gradient:blue-cyan -fill white -gravity north -pointsize 72 -annotate 0 "background" background.png
# Specify top-left and bottom-right
tl="32,432"
br="607,919"
# Get x1,y1,x2,y2 - bounding box of inserted image
IFS=, read -r x1 y1 <<< "$tl"
IFS=, read -r x2 y2 <<< "$br"
# Work out width and height
w=$((x2-x1+1))
h=$((y2-y1+1))
# Resize logo proportionally, then extend canvas with invisible pixels to full size of insertion area and composite onto background
convert background.png \( logo.png -resize ${w}x${h} -background none -gravity center -extent ${w}x${h} \) -gravity northwest -geometry +${x1}+${y1} -composite result.png
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改善答案
这更简单,更快,并且希望结果相同:
#!/bin/bash
# Make initial images
convert -size 720x720! gradient:red-yellow -fill white -gravity center -pointsize 72 -annotate 0 "logo" logo.png
convert -size 640x960! gradient:blue-cyan -fill white -gravity north -pointsize 72 -annotate 0 "background" background.png
# Specify top-left and bottom-right
tl="32,432"
br="607,919"
# Get x1,y1,x2,y2 - bounding box of inserted image
IFS=, read -r x1 y1 <<< "$tl"
IFS=, read -r x2 y2 <<< "$br"
# Work out w and h, and smaller side "s"
w=$((x2-x1+1))
h=$((y2-y1+1))
s=$w
[ $h -lt $w ] && s=$h
echo Smaller side: $s
# Resize logo proportionally, then extend canvas with invisible pixels to full size of insertion area and place on background
convert background.png \( logo.png -resize ${s}x${s} -background none -gravity center -extent ${w}x${h} \) -gravity northwest -geometry +${x1}+${y1} -composite result.png
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原始答案
我认为,根据您的评论,您希望将调整后的图像居中,所以我做到了。
另外,有很多调试代码,在我知道自己走对路之前,我还没有对其进行优化,因此可以肯定地对其进行改进。
#!/bin/bash
# Make initial images
convert -size 720x720! gradient:red-yellow -fill white -gravity center -pointsize 72 -annotate 0 "logo" logo.png
convert -size 640x960! gradient:blue-cyan -fill white -gravity north -pointsize 72 -annotate 0 "background" background.png
# Specify top-left and bottom-right
tl="32,432"
br="607,919"
# Get x1,y1,x2,y2 - bounding box of inserted image
IFS=, read -r x1 y1 <<< "$tl"
IFS=, read -r x2 y2 <<< "$br"
# Work out w and h, and smaller side "s"
w=$((x2-x1+1))
h=$((y2-y1+1))
s=$w
[ $h -lt $w ] && s=$h
echo Smaller side: $s
# Work out size of resized image
read -r a b < <(convert logo.png -resize ${s}x${s} -format "%w %h" info:)
echo Resized logo: $a x $b
# Work out top-left "x" and "y"
x=$((x1+((w-a)/2)))
y=$((y1+((h-b)/2)))
echo x:$x, y:$y
convert background.png \( logo.png -resize ${s}x${s} +repage \) -geometry +${x}+${y} -composite result.png
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