- https://en.wikipedia.org/wiki/Perspective_distortion_(photography)
- https://de.wikipedia.org/wiki/Stürzende_Linien – in German: “Stürzende Linien”
- https://learning.oreilly.com/library/view/the-book-of/9781457172410/ch16s02.html#perspective_tool – how to deal with perspective distortion using GIMP – from the “Book of GIMP”
- GIMP: Tools > Transform Tools > Perspective – it has a shortcut (⇧P), and also an icon in THE Toolbox
- https://en.wikipedia.org/wiki/Photoshopping
Tag: photoshopping
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perspective distortion (photography)
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No Starch Press book: Book of GIMP
Whether you’re just getting started with GIMP or working to master GIMP’s more complex features, you’ll find the answers you’re looking for in The Book of GIMP. -
O’Reilly Media book: GIMP 2.8 for Photographers
GIMP 2.8 for Photographers:
Image editing is a crucial element in the photographic workflow. Image editing tools, most notably Photoshop, are usually sophisticated and deep applications, and are fairly expensive. The only open source tool in this market is the GIMP, which has developed into a powerful, multiplatform system running on Linux, Mac OS X, and Microsoft Windows.GIMP 2.8 for Photographers is a beginner’s guide to the only open source image editing tool that provides a no-cost alternative to expensive programs such as Photoshop. Topics include the new user interface and tools, the basics of image editing and simple adjustments, advanced techniques using layers and masks, developing RAW images, working with the improved text tool, and preparing high-quality black-and-white images. The most important editing functions are presented in individual, easy-to-follow workshops. A bonus section on the included DVD describes special techniques for web graphics.
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how to make a rectangle image a square image using GIMP
I like reusing profile pictures from the web in my Google Mail Contacts aka address book.
On Xing or LinkedIn these pictures not necessarily are square, but on Google Mail Contacts you have to choose a sub-square. So maybe you want to resize the picture appropriately, so you don’t cut it, where you don’t want to cut it. Here is, how to proceed:
- Image / Canvas Size: disconnect the coupling between width and height,
- then make both the same, preferredly the larger one,
- then center
- and resize!
- Last not least: save the file with the highest quality!
BTW my designer mate doesn’t like GIMP, he prefers Photoshop. I gave GIMP a try for this purpose, and it did, what I expected it to do, in a perfect way, every try a perfect hit!