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How to do an "edge wrap" ?

Jun 8, 2012, 22:08
Post: #1
How to do an "edge wrap" ?
How do you copy a strip of the edge of an image and re-apply that strip to the outside of the image?

Now that I have a pentagon crop, I want to print it on canvas. To do this the image can
't be further cropped because I did that already. So I have to select a strip of the image at the edges and "flip " that outside of the edge so that the canvas wraps around the stretcher frame (don't want to have a white canvas side on the stretcher).

Any ideas on how to do this?

Thanks


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Jun 8, 2012, 22:43
Post: #2
RE: How to do an "edge wrap" ?
If instead of JPEG you use PNG, what is white here can be transparency.

Otherwise, you want to frame the square with strips from the image?

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Jun 9, 2012, 01:38 (This post was last modified: Jun 9, 2012 02:22 by Frank Schmidt.)
Post: #3
RE: How to do an "edge wrap" ?
No, not the square. I want to copy a 1 inch strip of the sides of the pentagon and apply that to the edges of the pentagon so that the stretched frame on its sides matches the image. The stretched frame stands off the wall on which it is hung by one inch. I do not want that side of the frame to be white ; CANVAS. it needs to be the same color and "style" as the image. So I copy the edge of the image and flip it as a "frame" of the image all round. Then build the stretcher frame and staple the canvas on the pine frame with the image showing on face and sides of the frame. Here's a photo.

I can select the edge and copy but do I need to form a new layer to apply this to the image edges outside of the image form?

Thanks.


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Jun 9, 2012, 11:31
Post: #4
RE: How to do an "edge wrap" ?
Just a tedious, select, copy paste for each side.

My thoughts on it, http://i.imgur.com/R9ABd.jpg

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Jun 9, 2012, 19:42
Post: #5
RE: How to do an "edge wrap" ?
Yes, same here. Otherwise you can also cut a larger pentagon that also includes the frame sides, and cut out a triangle in each corner.

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Jun 9, 2012, 21:05
Post: #6
RE: How to do an "edge wrap" ?
Thanks for the step by step series of screen shots, Rich2005

I saved them all as a page on my desktop and have studied the steps but don’t know the correct keystrokes and clicks to duplicate your steps.
First, you well understood my desires and looks like the end result is what I wanted so I guess my picture helped.
My first success was to convert my pentagon image from a .jpg to a .png file type , not sure why this is necessary but did it anyway.
Problem (possible) is that my pentagon image opens in GIMP to fill the white square (layer?) to its fullest, no white space beyond the corners of the pentagon. Does this matter?... seems like it should as eventually I will make new edges of the image that will extend beyond the beginning corners. I don’t know how to shrink the image within the white space (layer?) or enlarge the space so as to give me working room for eventual expansion. Should this be step 2? If so, how?
Thanks again for showing me that it can be done in GIMP, I’ll just have to ask ‘click by click’ how to do it.
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Jun 9, 2012, 21:28
Post: #7
RE: How to do an "edge wrap" ?
PNG knows "transparent" pixels, while JPEG doesn't.

You may want to use Image/Canvas size to enlarge you canvas.

If you take the cut/paste route, when it will come to aligning rectangles with the sides of the pentagon, you can do it with less trouble by:
- with the Move tool, move the rectangle so that one of its corner goes over the matching vertex of the pentagon
- start the Rotate tool
- before rotating, move the rotation center (drag the circle-cross) to the combined rectangle/pentagon vertex
- rotate the rectangle, you just have to drag its opposite corner over the other pentagon vertex.
-you can preposition H & V guides that cross over the pentagon vertex for a quikc and accurate positioning of the rectangle corner and the rotation center.

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Jun 10, 2012, 01:41
Post: #8
RE: How to do an "edge wrap" ?
"PNG knows "transparent" pixels, while JPEG doesn't."

OK, well, I guess that's worth noting. ....

So then I did the Image/Canvas to enlarge my canvas but all that did was re-positioned my image on a larger white background off center: Import the attached image and you'll see the pentagon with checkerboard on two sides. What good does that do ? or does it matter? Sorry for being so dense here.....

I kind of feel like I'm not making progress . Could someone just give me the click steps to do what http://i.imgur.com/R9ABd.jpg is showing?

Thanks kindly.


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Jun 10, 2012, 09:35
Post: #9
RE: How to do an "edge wrap" ?
I am sure that this is just first snag. In the canvas resize there is a centre button and at the bottom options for layers.

The whole thing as a video, hope it helps

http://youtu.be/4TCjoXWf_CU (6 1/2 mins)

Ofnuts suggestion of using the whole image to include the frame edges is a good one for the future, if you are printing on canvas (or paper) no need for cut-outs as the corner folds would take care of the excess. Looks that way on your example.

However, try lots of copy-paste-rotate, all good practice for the future.

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Jun 10, 2012, 14:22
Post: #10
RE: How to do an "edge wrap" ?
"The whole thing as a video, hope this helps"

Very definately this helps ! Thanks ! I wish there was a way to save the video as a file but that's another project.

Your method of copying a rectangular strip of the picture and then adding it to the edge of the pentagon is the best solution as it then allows me to KNOW what the edge lengths are for each cut piece of pine strip when frame building. If I just expand the picture and print it as a square or larger polygon than the finished frame size, then I'm guessing what length to cut the pine pieces for the stretcher frame and then re-cutting to finally get the correct size. Cut, assemble, trial stretch, then un-staple the canvas and disassemble frame, re-cut, re-assemble, trial stretch and so on.

The edge strip to be wrapped is a measuring tool for the frame maker. The above octogon case was Photoshopped and flipped as a square by the canvas printer (guy) which forced me to cut pine by trial and error; thus prompting this whole thread question.

Is there some duration limit for posting of the youtu.be video? Will it be up for a while on the site?

Thanks very much once again,
Frank
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Jun 10, 2012, 20:17 (This post was last modified: Jun 10, 2012 23:44 by Frank Schmidt.)
Post: #11
RE: How to do an "edge wrap" ?
    Thanks Guys !


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