Resizing images
To resize an image, use the predefined task resize.
By default, images are resized to 1280x768 (width x height).
anchor -t resize
We usually instead specify a different target size with the -ps command-line option which offers multiple possibilities.
-i command-line option (therefore reading images from the current directory) and the -o command-line option (therefore outputting into a temporary directory).Resizing with a scaling factor
To resize to half the existing width and height:
anchor -t resize -ps 0.5
To resize to double the existing width and height:
anchor -t resize -ps 2
Resizing to a specific width and height
To resize to specifically 1024x768 (width x height), breaking aspect ratio if necessary.
anchor -t resize -ps 1024x768
Resizing preserving aspect ratio
To resize to 800 pixels width, preserving existing aspect ratio.
anchor -t resize -ps 800x
To resize to 600 pixels height, preserving existing aspect ratio.
anchor -t resize -ps x600
To resize to the maximal-size possible, preserving existing aspect ratio, that fits inside 1000x900.
anchor -t resize -ps 1000x900+
Resizing to preserve file-names and any non-image files
The following command immutably resizes images from a source directory into a destination directory, preserving filenames, directory-structure and any adjacent non-image files.
anchor -i c:\foo\source\ -ip -ic -t resize -ps 250x350 -oo c:\bar\destination\