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Question

How to slice an image into equal parts with overlap

Forum|Forum|5 years ago
August 6, 2020
4 replies
11093 views

I have an image that needs to be split into 5 equal images (vertically) so that they can be printed to 5 canvases and hung together as an art piece. The overhang on the canvas for wrapping is 1.5 inch. I cannot figure out how to slice up the image into equal parts that allows the 1.5 inch overlap between the panels (so that when the canvases are wrapped, no part of the image disappears when looking at the front, if that make sense).

I've tried to lay out guide marks but the math is confusing me on how wide each section should be. I thought I should crop out sections of 10 inches (7 inch for the image plus 3 for the overlap on 2 sides) but I only get 4 panels. The image is 35 inches wide (large wall mural) and needs to be in 5 pieces.

Thank you!

How to

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Bojan Živković11378569

Community Expert

So far I do not see mention that your pieces must contain one small but exactly the same part of the image for overlap, if I can understand your question correctly.

You must divide image into 5 equal parts using guides what is easy solution. Then drag guides on both side of guide divider which should be spaced 0.75 in on both sides to have final 1.5 in overlap. The next step is to select portion or pieces which has 0.75 in on both sides as extension and to copy that portion on new layer. repeat operation for all 5 pieces. I am not sure why you need extra canvas? Anyway you already have explanation for that although it will complicate task and math to solve puzzle.

Here is what I mean:

Conrad_C

Community Expert

Have you tried using the Guide Layout feature to have Photoshop do a lot of the division math for you, as in the animation below?

If I understand what you’re doing, the artwork not only needs a 1.5 inch overlap between panels, but 1.5 inches of extra canvas around the entire artwork for the stretcher bars. If so, then the first step is to extend the Photoshop canvas beyond the artwork, also shown below.

S

sarakinvaAuthor

Participant

Thank you for putting that together. Yes, I did try the guides but I was getting mentally stuck with the extra spacing around the image. My boss who wants this done doesn't want a "white space" on the edge of the canvas - just the print. Maybe if I make the canvas color something that blends with the image, it will work OK.

Conrad_C

Community Expert

Yes, that’s what I would suggest. I’ve run into the same thing where I wanted to canvas wrap a print, but important parts of the image content were so close to the edge that they would have ended up on the side or back if I had wrapped the image edge itself. And I didn’t want a white wraparound color either. So I used the same idea you just mentioned. After expanding the canvas to provide overlap, I drew a big rectangle shape all the way out to the new expanded wrap edge, filled it with a solid color sampled from the image, and layered that behind the image.

The other way to do it, which sounds like the direction you were going in, is to set the background color to whatever you want, then when you go into Canvas Size you can set that as the Canvas Extension Color.

Either way, it’s the same as in the animation except with a color other than white in the canvas area around the artwork.

Another thing some people do is repeat the art around the edge but mirrored, so that it meets up with the image on the front. Haven’t tried that yet.

jane-e

Community Expert

Hi

Photoshop does not have Tiling as an option in the Print dialog, as InDesign, Illustrator, and Acrobat all do. The easiest solution is to print your image as a Photoshop PDF, then open it in Adobe Acrobat or the free Reader. Choose Poster for Page Size and Handling, then type 1.5 inches for the overlap.

~ Jane

S

sarakinvaAuthor

Participant

Thank you for the idea - I will try this too.

JJMack

Community Expert

If I read you correctly 35/5= 7 there be an extra 1.5" on each side for 1.5" wrap so the strip would be 10" and the cameras needs be expanded 3" to 38" there will be 5 10" wide strips 50" of canvas there 1.5" overlap between panels they have 3"in common with adjacent panels.

JJMack

S

sarakinvaAuthor

Participant

Did you mean canvas instead of camera? This is what I came up with as well but my image is only 35 in. so won't there be white space around the outside if I increase the canvas size? Thanks.

JJMack

Community Expert

If there is background layer the canvas added will have a color and can be any color you want. A background layer is canvas size for it does not support transparency. If there is no background layer add one.

JJMack

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