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Pasting a tif file into a new image

PostPosted: Sat Jan 12, 2019 7:27 pm
by sdracup
I want to join 2 tiffs together in a larger image. My original tiff is 4349x3443 pixels, 14.497 x 11.477 inches, 300 pixels per inch RGB - 8 bits/channel. I made a new image 16x 12 inches, 300 pixels per inch. I copied the original tiff, and pasted into the new image as a new layer. However, the pasted image was reduced to just over 5.5x4.5 inches. I tried again and the same result. I pasted the original tiff as a new image, and there was no size adjustment. I have looked through documentation, the forum, and on-line, but cannot find anything that tells me what I am doing wrong. The tiff was processed from a raw file to a tiff in Luminar. Using Paintshop Pro Ultimate 2019. Any ideas?

Re: Pasting a tif file into a new image

PostPosted: Sat Jan 12, 2019 8:14 pm
by JoeB
Can you confirm that your newly created image (the 16 x 12 image) is actually 4800 pixels by 3600 pixels, thereby confirming that it truly has been rendered with a ppi of 300?

Re: Pasting a tif file into a new image

PostPosted: Sat Jan 12, 2019 8:31 pm
by hartpaul
I tried to follow your setup avoiding the red herrings. (Stating sizes in inches is not necessary and we can keep all measurements in pixels)
From your post I gather you have an original image 4349 x 3443 pixels 300 ppi and a second larger image 4800 x 3600 pixels 300ppi.
You copy and paste that first original image into the second larger image - so there should be a difference of 451 pixels horizontally and 157 pixels vertically - the original image being slightly smaller than the new image.
This is what I get:


You appear to be saying that the pasted original image is resized down to 1660 x 1350 pixels {(5.54" x (300) X 4.5" x (300) }

Re: Pasting a tif file into a new image

PostPosted: Wed Jan 16, 2019 2:49 pm
by sdracup
Hi, Sorry if I added red herrings? Not sure what you mean by this. So here is what I did. I opened PSP X9 and did the same thing. I checked my new image and it was added at 4800x3600 pixels. When I added the tif, the original size was kept. So PSP X9 worked as I wanted it to. So I went back into PSP 2019 and did a new image. I do my sizings by inches so 16x12. So I checked my pixels, and was surprised the pixels said 12192x9144, so there is my answer. So I found the issue. My setting was set to pixels/cm instead of pixels/inch. I amended to pixels/inch, and all is well. THANKS so much for opening my eyes on this. I should have thought to check all my settings before bothering the forum.

Re: Pasting a tif file into a new image

PostPosted: Wed Jan 16, 2019 8:59 pm
by hartpaul
No Problems . It serves as a help to others who may have a similar problem at some time.
Also brings up another point - for many tools we have a reset to default which helps if we have accidentally changed a setting which makes the tool misbehave.
It would be good to have a reset to default for the New image dialog and also the Resize dialog.
The red herring I mentioned was the misleading figures mentioned in inches wheras if you had always looked at and mentioned the pixel values, the answer may have been obvious immediately .

Eg a 6 x 4 " image will have different values in pixels depending on its ppi value - at 100 ppi = 600 x 400 pixels, at 300 ppi = 1800 x 1200 pixels , at 1000 ppi will be 6000 x 4000 pixels . Add to that values sxpressed in ppcm and it can get quite confusing. Values expressed as 1200 x 800 pixels always remain as an absolute unless you resample at another ppi or ppcm value.

Likewise expressing an image in Kb or Mb is also confusing and has different interpretations. If the image is bmp , tif, jpg fine or jpg low quality , many different images with different pixel values could fit a particular size on disk.