Doug Kerr
Well-known member
This is probably well known to Photoshop gurus, but I had to do a lot of reverse engineering to find out how to do it in Photoshop CS5. There is probably another way.
Often, I will want to crop an image to a known aspect ratio (3:2, 4:3, 5:7, etc). I do not want any resampling done of the retained image region.
To do this, when using the crop tool, enter the aspect ratio you want in the Width and Height boxes of the tool control panel in any length unit (but not in pixels, and not without units, since in that case Photoshop will apply the unit "pixel"). Have no entry in the Resolution box. You can use inches, feet, centimeters, picas, etc.
Now, the tool will only draw a crop rectangle with the appropriate aspect ratio. When you have it in at the desired location, and of the right "scope", and commit, the image is cropped (and there is no resampling).
If you try and do this with the dimensions representing the desired aspect ratio in pixels, the aspect ratio of the crop rectangle is constrained, all right, but when you commit to the crop, the retained region is resampled to attain those pixel dimensions.
Often, I will want to crop an image to a known aspect ratio (3:2, 4:3, 5:7, etc). I do not want any resampling done of the retained image region.
To do this, when using the crop tool, enter the aspect ratio you want in the Width and Height boxes of the tool control panel in any length unit (but not in pixels, and not without units, since in that case Photoshop will apply the unit "pixel"). Have no entry in the Resolution box. You can use inches, feet, centimeters, picas, etc.
Now, the tool will only draw a crop rectangle with the appropriate aspect ratio. When you have it in at the desired location, and of the right "scope", and commit, the image is cropped (and there is no resampling).
If you try and do this with the dimensions representing the desired aspect ratio in pixels, the aspect ratio of the crop rectangle is constrained, all right, but when you commit to the crop, the retained region is resampled to attain those pixel dimensions.