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+--- Thread: correct perspective lines (/Thread-correct-perspective-lines)
correct perspective lines - denzjos - 09-20-2020
If one has taken a picture with the vertical lines ok and the horizontal lines not parallel, then the 'Align to path' (ob-align.py) plugin can help : https://www.gimp-forum.net/attachment.php?aid=275
Photo to correct
[attachment=4960]
Corrected photo
[attachment=4961]
RE: correct perspective lines - Ofnuts - 09-20-2020
What is the benefit over the Perspective tool in "Corrective" mode?
RE: correct perspective lines - Krikor - 09-20-2020
(09-20-2020, 07:09 PM)Ofnuts Wrote: What is the benefit over the Perspective tool in "Corrective" mode?
Or... over using corrective (backward) handle transform tool?
Straighten Buildings using GIMP corrective (backward) handle transform tool - https://youtu.be/PHDo4GU1BEA
RE: correct perspective lines - Ofnuts - 09-21-2020
(09-20-2020, 08:22 PM)Krikor Wrote:(09-20-2020, 07:09 PM)Ofnuts Wrote: What is the benefit over the Perspective tool in "Corrective" mode?
Or... over using corrective (backward) handle transform tool?
Straighten Buildings using GIMP corrective (backward) handle transform tool - https://youtu.be/PHDo4GU1BEA
Same question, why use HTT when the PT does the same? In The PT you just align the tool markers with whatever should become vertical/horizontal, so there is very little eyeballing involved.
RE: correct perspective lines - denzjos - 09-21-2020
When I used the perspective tool in corrective mode, I found it irritating that the image is enlarged to the perspective lines I used (or do I miss something) :
[attachment=4962]
RE: correct perspective lines - Ofnuts - 09-21-2020
As far as I can tell, neither the HTT nor the PT will restore the image to the proper aspect ratio(*). Theoretically in non-corrective mode, you could eyeball the proper aspect ratio when using the HTT, but getting the perspective and the aspect ratio fixed together is really fiddly, it is much faster to fix the perspective first and then scale the result in one direction to fix the aspect ratio.
(*) There is nothing in the image that tells what the proper ratio is. You have to figure it out from other clues.