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+--- Thread: Paste as Image - wrong dimensions (bug?) (/Thread-Paste-as-Image-wrong-dimensions-bug)
Paste as Image - wrong dimensions (bug?) - marco-gimp - 08-05-2020
GIMP 2.10.20 (revision 1)
Paste as Image - wrong dimensions (bug?)
Select 3500 x 4500
Paste as Image
New Image = 3522 x 4500
To test this
I created a new image at 3500 x 4500
Then pasted into selection
This time, there was a gap at the bottom of the image - the checkerboard was visible.
The image appeared to have shrunk to the width, and therefore shrunk the height.
Either way, the selection size was clearly 3500 x 4500 yet it will not paste at those dimensions.
RE: Paste as Image - wrong dimensions (bug?) - Kevin - 08-05-2020
I can't reproduce this BUT I am doing something you've not included in your instructions:
Image is 3600x4800
Make selection 3500x4500 by typing into the tool options
Copy
Paste as New image
New image is 3500x4500
RE: Paste as Image - wrong dimensions (bug?) - rich2005 - 08-05-2020
Works here, kubuntu 18.04 / Gimp 2.10.20 Select -> Copy -> Paste as new image.
The only way I get an increase in size is when Feather Edges is enabled but that gives a margin on all sides.
RE: Paste as Image - wrong dimensions (bug?) - marco-gimp - 08-05-2020
Thanks for those responses.
@ Rich2005 Yes it was the Feathered Edges wot done it
I've just recreated the scenario.
The likely reason why the 22 pixels only appeared on the width is because I first scaled up the original landscape image to 4500 height.
This was to define the scale 35 / 45 (I was happy with the height content)
Consequently, I selected the height at 0 & 4500
Then the width was centred around the subject @ 3500
The selection editor showed image size as 3500 x 4500.
Copy Visible - Paste as New Image = 3522 x 4500
This test was repeated with feathering OFF and 3500 x 4500 was correctly pasted.
Another Test
The test was repeated at 3500 x 4400
Ie. all the selection was within the original image.
Interestingly enough, I learned a funny quirk.
With feathered Edges off it pasted as 3500 x 4400
Last test was to switch ON Feathered Edges, so I clicked the box, and the x appeared.
Copy and pasted but NO CHANGE?
I returned to feathered edges, changed the radius then copy and pasted = 3526 x 4413
From this, it appears that simply clicking the box doesn't make the switch.
It's rather like changing a dimension, without hitting enter, or clicking in another box.
Debate
I can see both arguments -
Feather edges but don't lose data
Or
Select to create an image to dimensional specification
Of course, once you know how it works, then you can do the maths to achieve the final image (subtracting feathering radius).
Overall though, I'd side with pasting the stated dimensions, because very often one is creating an image to dimensional specs.
Rarely if ever, is one concerned with a few pixels loss to feathering and hence why feathering might be chosen.
What do you think?
RE: Paste as Image - wrong dimensions (bug?) - Ofnuts - 08-05-2020
The only sensible behavior is to include everything. You can suppress the feathering beforehand, while in the general case restoring not-copied partially transparent pixels is much harder (because there are many cases where this won't be a plain feathering, but for instance anti-aliasing pixels).