change background to white
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#1. "RE: change background to white" | In response to Reply # 0
Ferguson Nikonian since 19th Aug 2004Mon 19-Jun-17 11:44 AMI'm not much of a photoshop guru, but I can suggest you need to provide a bit more details.
Changing a background involves either (a) selecting the background, or (b) selecting the foreground and inverting the selection (to get the background).
Are you having trouble with the selection itself?
If so, you may need to help out with an example image, and some idea what you are struggling with. There are lots of ways people can do selection - color matching, trying to follow edges, painting manually... I struggle with doing this well myself, but the ones that do it well can probably help more if you can describe more what you are doing and having trouble with (and an example).
In addition, changing it to white can be abrupt -- do you really want a solid white background with just a foreground subject, or are you trying to do something more artistic, like having shades of white/grey in some shape or pattern?
Linwood
Comments welcomed on pictures: Http://www.captivephotons.com-
#2. "RE: change background to white" | In response to Reply # 1
bobpilot Nikonian since 08th May 2007Mon 19-Jun-17 11:51 AMI made a photograph of sunglasses for an acquaintance. He is trying to sell them and he wants a white a white background. Nothing artistic. The photo I made has an off-whte background. I made the photo with the glasses on top of translum paper with a light above and below.
The instructions don't match with what I find. I have no PS skills
File size:184143 bytesFile date:Mon 19-Jun-17 11:50 AMCamera make:NIKON CORPORATIONCamera model:NIKON D3SDate/Time:Sat 17-Jun-17 10:45 PMResolution:1000 x 665Flash used:NoFocal length:180.0mm (35mm equivalent: 180mm)Exposure time:0.0040 s (1/250)Aperture:f/25.0ISO equiv.:800Whitebalance:AutoMetering Mode:center weightExposure:ManualExposure Mode:ManualJPEG Quality:98======= IPTC data:=======City:Record vers.:4Keywords:Studio(C)Notice:LensTrek Photography
Attachment#1 (jpg file)
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#3. "RE: change background to white" | In response to Reply # 2
Ferguson Nikonian since 19th Aug 2004Mon 19-Jun-17 12:10 PM>The instructions don't match with what I find. I have no PS
>skills
I have no real skills, but do have a dangerous amount of knowledge.
There are a couple ways you might try for that. Here's my suggestion (based on PS CC 2017):
1) select the magic wand tool (left panel, 4th down, you might have to right click to get it, it's a wand with little stars).
2) Change the tolerance to something moderate, like 30 or so, select Contiguous (not sure if anti-alias matters).
3) Click anywhere on the white. It will select most of the background, but not within the parallel nose bridge as it's not contiguous. Select the "add to selection" at the top (two squares both white) to let it add more to the selection, and then click between the nose bridge pieces and it gets selected also.
4) You'll find it is not quite good enough yet, but it should be close. You can try again with different tolerances, bigger numbers will be more aggressive at selection. Or you can keep using the "add to selection" to select areas, like partial shadow, and get closer.
5) At any time you think it is close enough, just hit Edit, Fill, choose white.
If that doesn't get you close enough, choose the select and mask option at the top. This gives you a bunch of masking choices (try black and white -- it's on the top left under properties under view).
Now you have similar tools on the top left. Notice the + and -. Plus is adding to the selection, minus will remove from it. Probably you'll need to add to the selection to get background that was in shadow.
The tools are a big arcane, and this is where I get confused, but basically the third down (brush with solid paint) as a gross, unconditional selection (or un-selection if minus is set), and the one above with the fine paint lines as one that is smart about edges.
Before you use them, experiment a bit with the "global refinements" shifting back and forth to see what they do, and get one you like. Same with edge detection. Experiment a bit. I find that increasing contrast and setting edge detection to 1-2 gives good results, then smoth until it seems decently to follow edges.
Bruse selection in and out until you get what looks good. You can flip through view modes as well to see the real image and other masks.
When it's right, check that output settings (right panel) is set to Selection, and just say "OK".
Then fill.
Linwood
Comments welcomed on pictures: Http://www.captivephotons.com-
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#6. "RE: change background to white" | In response to Reply # 4
Ferguson Nikonian since 19th Aug 2004Mon 19-Jun-17 06:56 PM>it worked as you said, however, it also removed part of the
>frames
Before doing the fill, subtract the selection near the frames. You may need to zoom WAY in and paint the minus selection over the frame. With PS the bad news (or maybe it's good news) is you can get down to the single pixels and change selection one at a time -- way too tedious, but somewhere less zoomed you may be able to get it.
Linwood
Comments welcomed on pictures: Http://www.captivephotons.com
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#7. "RE: change background to white" | In response to Reply # 2
aolander Nikonian since 15th Sep 2006Mon 19-Jun-17 07:35 PMHow about just using the White Balance dropper in Lightroom to remove the color cast and bump up the Highlights and Whites a little.
Like this:
File size:62417 bytesFile date:Mon 19-Jun-17 07:34 PMDate/Time:Mon 19-Jun-17 12:04 PMResolution:1000 x 665JPEG Quality:91
Attachment#1 (jpg file)
Alan
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#10. "RE: change background to white" | In response to Reply # 7
bobpilot Nikonian since 08th May 2007Tue 20-Jun-17 11:22 AM>How about just using the White Balance dropper in Lightroom
>to remove the color cast and bump up the Highlights and Whites
>a little.
I like your idea, and using LR is better for me.
I will work on this
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#8. "RE: change background to white" | In response to Reply # 0
Visit my Nikonians gallery.
Attachment#1 (jpg file)
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#9. "RE: change background to white" | In response to Reply # 8
bobpilot Nikonian since 08th May 2007Mon 19-Jun-17 09:04 PM | edited Tue 20-Jun-17 11:26 AM by bobpilotI am hoping to avoid PS. He wants me to make a lot of photos for him, and I hope to find a way to this fast and consisten
>Use the select color range option to select the background.
>Then use that selection as a mask on a levels adjustment.
>Just drag the right side of the levels tool in towards the
>middle and the background will lighten up.
>
>
>Visit
>my
>Nikonians gallery>.
>
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#12. "RE: change background to white" | In response to Reply # 11
shadowman371 Registered since 03rd Dec 2016Tue 20-Jun-17 03:44 PM>If you had to produce 50 photos with a consistent composition
>and with a white background,PS is not to be used, what
>equipment would you use?
My first choice would be a light tent, you can make a DIY version with a drop cloth. Second choice would be an LED lightpad.
https://www.amazon.com/Artograph-inch-Light-Pad-Box/dp/B003N45KRS-
#13. "RE: change background to white" | In response to Reply # 12
bobpilot Nikonian since 08th May 2007Tue 20-Jun-17 04:59 PMI used the materials I had and made a light cubicle. Light from above and light from below. I ran into two problems:
1. Even at full power the background was not white. I used an Einstein and shot through tanslum paper for both top and bottom lights. Maybe too much diffusion.
2. At a setting as close to white as I could achieve, the sunglasses were overexposed by a large amount.
This experiment forces me to conclude that a lighting setup to achieve a white background is not possible, for me. I am sure others could do this.
To use PS for each photo would be a time-consuming process, for me, with inconsistent results. The light bleeds over onto the rounded frames and so this means extensive edge work that I don't have the desire to do.
>My first choice would be a light tent, you can make a DIY
>version with a drop cloth. Second choice would be an LED
>lightpad.
>
>https://www.amazon.com/Artograph-inch-Light-Pad-Box/dp/B003N45KRS-
#14. "RE: change background to white" | In response to Reply # 13
jander18 Charter MemberThu 22-Jun-17 05:52 PMIf you decide to stay with PS, it might be simpler to select the glasses first and feather the edge. Then invert the selection (to select the background) and do the adjustment.
I find the quick selection tool (below the lasso and above the crop tool) to be a very intelligent selector, much quicker than the old PS magic wand etc.
But I also agree that the WB eye dropper in LR might be the answer to your prayers!-
#15. "RE: change background to white" | In response to Reply # 14
bobpilot Nikonian since 08th May 2007Thu 22-Jun-17 08:37 PMIt all sounds so magical. This exercise has encouraged me to learn some Photoshop skills.
With some set modifications I believe I have accomplished the white background with the use of lights, flags, and Lightroom.
>If you decide to stay with PS, it might be simpler to select
>the glasses first and feather the edge. Then invert the
>selection (to select the background) and do the adjustment.
>
>I find the quick selection tool (below the lasso and above the
>crop tool) to be a very intelligent selector, much quicker
>than the old PS magic wand etc.
>
>But I also agree that the WB eye dropper in LR might be the
>answer to your prayers!
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G
If you know of a source that details the steps to change a background to white, could you post the link?