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How to "best fit" (crop/resize)
Posted: 2016-10-07T07:06:43-07:00
by squadjot
Hi all!
i'd like to crop images to fit a certain size (filling the format with the image)
To illustrate what i want i created the desired effect in HTML/CSS
http://edweb.dk/Temp/crop.html
As you can see the image is centered and filling the container, the rest is cropped away.
How to achieve this with IM?
I'm using ImageMagick-6.8.9-0 cmd on windows
I tried fiddling with a script.. but it doesent work.. this simply just resizes the image
Code: Select all
convert myfile.jpg -resize 280x400 -extent 280x400 -quality 90 converted.jpg
Hope someone can help me, thanks
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T07:49:38-07:00
by Marsu42
squadjot wrote:Hope someone can help me, thanks
You need to somehow calculate the exact part that you want to crop, I'm doing this outside im with a shell script after reading the image props. Then set the gravity % crop this area, then resize. Lookie here under "{size}{+-}x{+-}y":
http://www.imagemagick.org/script/comma ... p#geometry
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T09:36:45-07:00
by fmw42
If your new size does not have the same aspect ratio as the original, then you will have to either 1) pad, 2) crop or 3) distort
Unix syntax:
PAD:
Code: Select all
convert A_original.jpg -resize 280x400 -gravity center -background black -extent 280x400 -quality 90 converted.jpg
CROP:
Code: Select all
convert A_original.jpg -resize 280x400^ -gravity center -extent 280x400 -quality 90 converted.jpg
DISTORT:
Code: Select all
convert A_original.jpg -resize 280x400! -gravity center -extent 280x400 -quality 90 converted.jpg
In Windows syntax, escape the ^ as ^^
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T10:44:24-07:00
by squadjot
fmw42 wrote:
CROP:
Code: Select all
convert A_original.jpg -resize 280x400^ -gravity center -extent 280x400 -quality 90 converted.jpg
I'll try this, thanks!
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T11:21:08-07:00
by fmw42
On windows, you will need to escape the ^ as ^^
Code: Select all
convert A_original.jpg -resize 280x400^^ -gravity center -extent 280x400 -quality 90 converted.jpg
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T15:36:10-07:00
by squadjot
I can not get it to work :/
My bat file contains following:
Code: Select all
convert %1 -resize 280x400^^ -gravity center -extent 280x400 -quality 90 converted.jpg
And this is what i get:
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T15:50:10-07:00
by snibgo
If you also uploaded your input file, we could test with it and find the problem. But you didn't.
Re: How to "best fit" (crop/resize)
Posted: 2016-10-07T19:35:00-07:00
by fmw42
Using the first image in your upload as the input (A_original.jpg), it works fine for me on IM 6.9.6.0 and 6.8.9.0 Q16 Mac OSX and resizes and crops the image to fill the window. Windows syntax needs the ^ escaped to ^^ as you seem to have done. But your result seems to be as if it was not using the ^^.
Try
Code: Select all
convert %1 -resize "280x400^^" -gravity center -extent 280x400 -quality 90 converted.jpg
Try running it in a command window with the exact same file I used directly in the command without a variable for the input file. Were you running it in a bat script?
Are you using the same input image that I am. If not please provide that.
Re: How to "best fit" (crop/resize)
Posted: 2016-10-09T14:47:33-07:00
by squadjot
Using quotes worked
Code: Select all
convert %1 -resize "280x400^" -gravity center -extent 280x400 -quality 90 converted.jpg
Both a single ^ and double ^^ worked
Thanks alot!, i would never have figured that out myself
