I have to work with photos quite a lot. But the only graphics programs I have consistently used consistently over the years have been (the non-opensource, crossplatform program) XnView and GIMP. I usually go to GIMP only when there is something a bit more complicated to do. In XnView, my main uses are auto-correcting white balance (or doing this manually, if the automatic function does not work very well for a photo), cropping, and batch-resizing. My favourite shape for photos is 3:2, like the old 15x10 cm. printed photos. 4:3 is not a pleasant shape to look at (for me), and, if I use this size for a featured image under the title of a WordPress post, the text below it is too far down the page. 16:9 is too wide for many needs, especially if the photographer did not intend this shape when taking the picture. Standardizing on 3:2 is easier.
When I receive a bunch of photos from people for a post, these are often of mixed sizes, shapes and orientation. I don't batch crop, but I usually want to batch resize at least some of these photos, so that they will be of the right size, or the right weight, for the web. Obviously, when making the photos a uniform size, I do not want to enlarge the ones that are small.
XnView handles these needs quite nicely because :
a. It can choose to resize only those photos that are too large.
b. It can choose that the new dimensions will be according to just the longest side.
I have installed Gthumb again, which is much improved from its early versions. It has perhaps a more agreeable interface than XnView, has some nice editing functions; including many that are absent from XnView. But its batch resize functions are primitive compared to XnView (see screenshots). I say this with a little bit of uncertainty, because under GThumb's "Personalize" function, it may be possible to create scripts that can do more - but this is beyond me. I am sure there are ways to obtain the same flexibility by using Imagemagic, and there is a batch plugin for GIMP. But I know that with me, GUI simplicity works better than memorizing complex commands.
XnView's batch editor:
GThumb's batch editor:
There is one annoyance in XnView. Sometimes, especially after altering a photo, it gets the orientation wrong. Eventually, I discovered that this has to be corrected in Tools | JPEG Lossless Transformations rather than by the more intuitive method of rotating the photo in the editing view.
Anyway, I think I may incorporate GThumb into my workflow.
Meanwhile, I still did not understand why, in my Hubzilla instance, my PNGs come out looking better than JPGs. And I wonder when Hubzilla will begin to handle WebPs ?
✭ Popular Tools for easily Cropping and Resizing images in Ubuntu
While working with images, even as an amateur, we frequently encounter the seemingly simple task of resizing and cropping our image files. Let us first see how cropping and resizing are different from each other.
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