Image sizing

[KATHYB]

I am a watercolour artist and I paint various elements to be included in a fabric pattern, the size of the patter is 8inches x 8inches.  When I take a photo of each image to put into Gimp they are all 3024 x 4032 or 42 inches x 56 inches.  I need to take each image and make it fit onto the 8inch x 8inch tile and then make it repeating.

I have no idea how to do this.  When I open a new file and make it 8inch x 8inch the images dont fit on to them. 

Also, when I do size down each image, (albeit with huge loss of resolution) I cant work out how to take the cut image (not the one with the box around it) and put it onto the relevant layer. 

I am really new to all this, and I use Youtube to see tutorials about how to do this kind of thing but they don't seem to cover this image sizing problem.   I think I must be doing something wrong so I just need to know if I am or if there is no way to do it.  

I am really just a watercolour artist trying to work out how to do this stuff in Gimp - I'm not a techie or someone who uses photoshop or any other program.

Any help would be really appreciated.

[rich2005]

Quote:...I am a watercolour artist and I paint various elements to be included in a fabric pattern, the size of the patter is 8inches x 8inches.  When I take a photo of each image to put into Gimp they are all 3024 x 4032 or 42 inches x 56 inches...

ref: https://i.imgur.com/7X6hw2e.jpg
Gimp and your camera work in pixels not real world  (inches / millimetres etc) units. Open up your photo in Gimp then go to  Image -> Print Size and you will see  something like
Top of the Gimp window the size in pixels (1)
The Image Print resolution. The pixels-per-inch (ppi) is 72 Units in inches 42 x 56 (2)

If you want that square, then you will have to crop-out part of the image. Crop Tool (3) Set the aspect ratio to fixed and 1:1 (4) and size up the tool on the canvas to what you require as a tile. (5) Hit the enter key or click inside the square to complete.

ref: https://i.imgur.com/cop6U6Z.jpg
You now have a square and for printing that might be set to any ppi you like. However for the sake of tidyness you might want to scale the image to a ppi of 300 This is a rule of thumb for photographic quality (although for various circumstances it can be less) The magick number here is to end up with a square 2400 x 2400 pixels (6)  2400 pix @ 300 ppi = 8"

Seamless tiles: This can be a bit of a dark art and involve much editing by hand or the Gimp Seamless tile tool Filters -> Map -> Tile Seamless (7) might work out-of-the-box. All depends on image you made.

Exporting the image (png or jpg) to the Gimp patterns folder and filling a Gimp A4 size canvas looks like this: https://i.imgur.com/7rlfjGf.jpg

Post one of your photos (use dropbox or similar) and you might some considered advice.

Quote:..When I open a new file and make it 8inch x 8inch the images dont fit on to them. ..

You must start off with a suitable canvas. Gimp 2.10 now tends to default to 300 ppi as above but if you are still using Gimp 2.8 it will be 72 ppi and much too small in pixels. 8" @ 72 ppi is only 576 pixels. Printing quality will be awful. Make a canvas 2400 x 2400 pixels If copy pasting then you might still have some scaling to do but not so much.

edit: Oh...I see from your previous post you are using a Mac - then probably Gimp 2.8 and that 72 ppi default resolution.
Make a new canvas like this: Set the X / Y resolution first, then set the width / height size in pixels or inches.

   

[KATHYB]

(04-14-2020, 09:45 AM)rich2005 Wrote:

Quote:...I am a watercolour artist and I paint various elements to be included in a fabric pattern, the size of the patter is 8inches x 8inches.  When I take a photo of each image to put into Gimp they are all 3024 x 4032 or 42 inches x 56 inches...

ref: https://i.imgur.com/7X6hw2e.jpg
Gimp and your camera work in pixels not real world  (inches / millimetres etc) units. Open up your photo in Gimp then go to  Image -> Print Size and you will see  something like
Top of the Gimp window the size in pixels (1)
The Image Print resolution. The pixels-per-inch (ppi) is 72 Units in inches 42 x 56 (2)

If you want that square, then you will have to crop-out part of the image. Crop Tool (3) Set the aspect ratio to fixed and 1:1 (4) and size up the tool on the canvas to what you require as a tile. (5) Hit the enter key or click inside the square to complete.

ref: https://i.imgur.com/cop6U6Z.jpg
You now have a square and for printing that might be set to any ppi you like. However for the sake of tidyness you might want to scale the image to a ppi of 300 This is a rule of thumb for photographic quality (although for various circumstances it can be less) The magick number here is to end up with a square 2400 x 2400 pixels (6)  2400 pix @ 300 ppi = 8"

Seamless tiles: This can be a bit of a dark art and involve much editing by hand or the Gimp Seamless tile tool Filters -> Map -> Tile Seamless (7) might work out-of-the-box. All depends on image you made.

Exporting the image (png or jpg) to the Gimp patterns folder and filling a Gimp A4 size canvas looks like this: https://i.imgur.com/7rlfjGf.jpg

Post one of your photos (use dropbox or similar) and you might some considered advice.

Quote:..When I open a new file and make it 8inch x 8inch the images dont fit on to them. ..

You must start off with a suitable canvas. Gimp 2.10 now tends to default to 300 ppi as above but if you are still using Gimp 2.8 it will be 72 ppi and much too small in pixels. 8" @ 72 ppi is only 576 pixels. Printing quality will be awful. Make a canvas 2400 x 2400 pixels If copy pasting then you might still have some scaling to do but not so much.

edit: Oh...I see from your previous post you are using a Mac - then probably Gimp 2.8 and that 72 ppi default resolution.
Make a new canvas like this: Set the X / Y resolution first, then set the width / height size in pixels or inches.

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(04-14-2020, 11:13 PM)KATHYB Wrote:

(04-14-2020, 09:45 AM)rich2005 Wrote:

Quote:...I am a watercolour artist and I paint various elements to be included in a fabric pattern, the size of the patter is 8inches x 8inches.  When I take a photo of each image to put into Gimp they are all 3024 x 4032 or 42 inches x 56 inches...

ref: https://i.imgur.com/7X6hw2e.jpg
Gimp and your camera work in pixels not real world  (inches / millimetres etc) units. Open up your photo in Gimp then go to  Image -> Print Size and you will see  something like
Top of the Gimp window the size in pixels (1)
The Image Print resolution. The pixels-per-inch (ppi) is 72 Units in inches 42 x 56 (2)

If you want that square, then you will have to crop-out part of the image. Crop Tool (3) Set the aspect ratio to fixed and 1:1 (4) and size up the tool on the canvas to what you require as a tile. (5) Hit the enter key or click inside the square to complete.

ref: https://i.imgur.com/cop6U6Z.jpg
You now have a square and for printing that might be set to any ppi you like. However for the sake of tidyness you might want to scale the image to a ppi of 300 This is a rule of thumb for photographic quality (although for various circumstances it can be less) The magick number here is to end up with a square 2400 x 2400 pixels (6)  2400 pix @ 300 ppi = 8"

Seamless tiles: This can be a bit of a dark art and involve much editing by hand or the Gimp Seamless tile tool Filters -> Map -> Tile Seamless (7) might work out-of-the-box. All depends on image you made.

Exporting the image (png or jpg) to the Gimp patterns folder and filling a Gimp A4 size canvas looks like this: https://i.imgur.com/7rlfjGf.jpg

Post one of your photos (use dropbox or similar) and you might some considered advice.

Quote:..When I open a new file and make it 8inch x 8inch the images dont fit on to them. ..

You must start off with a suitable canvas. Gimp 2.10 now tends to default to 300 ppi as above but if you are still using Gimp 2.8 it will be 72 ppi and much too small in pixels. 8" @ 72 ppi is only 576 pixels. Printing quality will be awful. Make a canvas 2400 x 2400 pixels If copy pasting then you might still have some scaling to do but not so much.

edit: Oh...I see from your previous post you are using a Mac - then probably Gimp 2.8 and that 72 ppi default resolution.
Make a new canvas like this: Set the X / Y resolution first, then set the width / height size in pixels or inches.

Rich 2005 Thank you very much This was very helpful and I was able to do what I wanted to do.  Thank you again.   

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Rich 2005 Thank you very much This was very helpful and I was able to do what I wanted to do. Thank you again.

[Ofnuts]

This kind of question arises quite often so I cooked up a small tutorial. Comments welcome.