Hi, can I "select all" and globally replace the white in a photo to fix issues when printing?

Opalessence

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Hi, thanks in advance for any help with this...

I've been trying to make small (4 x 6") prints of some photos - which are screenshots of Instagram posts of landscapes, to which I've added 1 inch "white" borders. I did this by adding rectangles to the edges via the markup tool on my MacBook Pro. (I want the photos to be small to keep the images phone screen sized, and to not lose resolution in printing. I'll trim the prints I get back, if I can get a decent print made...)

[These photos are to accompany paintings I made from these references, but to also gift them the Insta post with the captions so it gives the painting more context.]

I used the dropper tool to pick up the "white" of the background of the IG post's text, but when I did test prints at the CVS/Shutterfly, and Walmart , the "white" of the border and background of the captions aren't fully white. Some show the faint edge of the rectangles and in some, there's splotching, which might be the low-quality printer issue.

I'd like to get these printed like postcard-sized artist cards that would be at a gallery show, but I know I need to get the white text background and edges to be purely white.

I can see that a solution would be to "select all" of that supposedly "white" color and replace it with the white on the Photo app's color selector.

I really should get Photoshop-like software for how many photos I take, but I'm not in the budget for it right now.

Is there any way to do this without spending a bunch of money on a subscription to an Adobe product? I did a quick search on this on Reddit and some ppl mentioned Darkwave, Mubi, and a couple others, but I thought I'd ask here first for any help.

Also, if I can fix this issue with the white background, where's the best place to print these? Locally, I can't find a photo lab that will print smaller than 5 x 7 and they only work with artist giclee prints.

I don't want to spend more than a couple dollars per photo, if that, on this aspect, since the paintings took so much time and the photo prints don't need to be super-high quality. I just want to fix that issue w the white and thought there might be a way to do a "select all" and "global replace" for it.

Wow, I didn't mean to write out so much detail, but thought this info might be helpful in figuring out solutions. Thanks so much!!
 
Photopea is a great alternative to Photoshop and it's free.

 
Hi, thanks in advance for any help with this...

I've been trying to make small (4 x 6") prints of some photos - which are screenshots of Instagram posts of landscapes, to which I've added 1 inch "white" borders. I did this by adding rectangles to the edges via the markup tool on my MacBook Pro. (I want the photos to be small to keep the images phone screen sized, and to not lose resolution in printing. I'll trim the prints I get back, if I can get a decent print made...)

[These photos are to accompany paintings I made from these references, but to also gift them the Insta post with the captions so it gives the painting more context.]

I used the dropper tool to pick up the "white" of the background of the IG post's text, but when I did test prints at the CVS/Shutterfly, and Walmart , the "white" of the border and background of the captions aren't fully white. Some show the faint edge of the rectangles and in some, there's splotching, which might be the low-quality printer issue.

I'd like to get these printed like postcard-sized artist cards that would be at a gallery show, but I know I need to get the white text background and edges to be purely white.

I can see that a solution would be to "select all" of that supposedly "white" color and replace it with the white on the Photo app's color selector.

I really should get Photoshop-like software for how many photos I take, but I'm not in the budget for it right now.

Is there any way to do this without spending a bunch of money on a subscription to an Adobe product? I did a quick search on this on Reddit and some ppl mentioned Darkwave, Mubi, and a couple others, but I thought I'd ask here first for any help.

Also, if I can fix this issue with the white background, where's the best place to print these? Locally, I can't find a photo lab that will print smaller than 5 x 7 and they only work with artist giclee prints.

I don't want to spend more than a couple dollars per photo, if that, on this aspect, since the paintings took so much time and the photo prints don't need to be super-high quality. I just want to fix that issue w the white and thought there might be a way to do a "select all" and "global replace" for it.

Wow, I didn't mean to write out so much detail, but thought this info might be helpful in figuring out solutions. Thanks so much!!
I, too, have a MacBook Pro, and when I take screenshots of Instagram posts, the white around the comments below the Instagram image appears pure white.

I may misunderstand which white point you are checking, but that is the first concern I have: the screenshot should have a pure white background around the text.

That would be the frist thing to clear up.

The second potential issue is that many big box print companies default to automatic corrections. So it very well may change the white level. Some have the ability to turn off auto correction so that is another place where whites could change relative to areas outside the image proper (white border of photograph that is not borderless)

Those are two potential issues to consider and hope this helps

John Wheerl
 
I'd suggest MPIX online for prints, if they have a size that fits your needs.

As to the white border, be sure there is no color in the white. I'm not familiar with your software, but I do something similar with layers in Photoshop. I have a template layer set to pure white the size of the print with a blank opening the size and position of the desired image. I then bring in the image on a layer under that and adjust the size for best fit in the opening.

Gato
 
I really should get Photoshop-like software for how many photos I take, but I'm not in the budget for it right now.
Photoshop shouldn't be necessary for simple things like this. If you have $40 there are many Mac alternatives. There are even some free ones.

If all you do is want to make sure white is pure white, you might try Apple Photos which is already on your Mac for no extra cost:
  1. Open the photo in Apple Photos and click the Edit button.
  2. Expand the Curves or Levels section, and pull in the White Point control, making sure not to clip any detail.
  3. Export a copy of the edited photo.
Step 2 is the same as an age-old common technique in Photoshop. Today, those Curves or Levels controls are in lots of cheap/free software.

If the highlights look off-white, in step 2 do this instead in Apple Photos: In Curves, select the white point sampler (eyedropper icon) and click in the off-white highlights. It should correct the color cast. Again, this is something often done in Photoshop, but you don't need Photoshop for this now since so many cheap/free apps have the same feature.
 
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