The Incredible Math Behind the Divide Blend Mode! Tutorial
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Date: 2022-07-19
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Comments and reviews: 20
Frank
This method is a VERY effective tool when colour-correcting scans of old slides, and is a great time saver compared with other methods. I have a large collection of slides dating back to the 70s on various types of film, some of which exhibit significant colour shifts. I tested this method on about a dozen scans and was able to achieve quite consistent results.
Results can't be expected to be perfect, but in most cases I was able to get the colour balance in the 'ballpark' for further tweaking.
Particularly beneficial for getting rid of that infamous Kodachrome colour cast!
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This method is a VERY effective tool when colour-correcting scans of old slides, and is a great time saver compared with other methods. I have a large collection of slides dating back to the 70s on various types of film, some of which exhibit significant colour shifts. I tested this method on about a dozen scans and was able to achieve quite consistent results.
Results can't be expected to be perfect, but in most cases I was able to get the colour balance in the 'ballpark' for further tweaking.
Particularly beneficial for getting rid of that infamous Kodachrome colour cast!
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Velson
Thank you. Quick, thorough and understandable (just. I have been looking for divide for some while. I am taking multiple macro photographs with identical settings but lighting is difficult and somewhat uneven, ca +/- 5%. So I want to grab an image of the illumination on a white sheet, then normalise the lighting by dividing that into the matrix of macro photographs to be composited. You have demonstrated this by modifying colours. Does it work by choosing L, rather than a colour? Let's see if it works!
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Thank you. Quick, thorough and understandable (just. I have been looking for divide for some while. I am taking multiple macro photographs with identical settings but lighting is difficult and somewhat uneven, ca +/- 5%. So I want to grab an image of the illumination on a white sheet, then normalise the lighting by dividing that into the matrix of macro photographs to be composited. You have demonstrated this by modifying colours. Does it work by choosing L, rather than a colour? Let's see if it works!
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Benjamin
Wow you nailed it. Never seen any mathematical formula to any photoshop edit until you walked me back to my algebra days. You are just amazing and your contents are exclusive. Thank you so much and I have learnt and keep learning from your videos. Today I was moved to comment on your video. Amazing content. By the way any free software plugin to much the infinite texture plugin (ai visualizer) I need one to keep practicing.
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Wow you nailed it. Never seen any mathematical formula to any photoshop edit until you walked me back to my algebra days. You are just amazing and your contents are exclusive. Thank you so much and I have learnt and keep learning from your videos. Today I was moved to comment on your video. Amazing content. By the way any free software plugin to much the infinite texture plugin (ai visualizer) I need one to keep practicing.
reply
Mexican
During fieldwork documenting indigenous costumes, I often must take shots I know are problematic. This shot was at a fair with an orange tarp. After trying divide and moving around the slider to correct the color, I realized that it was too much for divide to fix. I used HLS color tuning ( Topaz) and then, after that, applied the divide A/l. This image, after so long, has been saved.
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During fieldwork documenting indigenous costumes, I often must take shots I know are problematic. This shot was at a fair with an orange tarp. After trying divide and moving around the slider to correct the color, I realized that it was too much for divide to fix. I used HLS color tuning ( Topaz) and then, after that, applied the divide A/l. This image, after so long, has been saved.
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CloneDaddy
Goldurn it!
I got some cheap ND filters for Christmas a couple of years ago, and they give everything a magenta cast.
I tried everything to get rid of the colour, but gave up in the end and converted everything to B&W, instead.
Now I'm wondering if this will do the trick.
Guess what I'm doing tomorrow?
Another good one, Unmesh. Blessings be upon you.
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Goldurn it!
I got some cheap ND filters for Christmas a couple of years ago, and they give everything a magenta cast.
I tried everything to get rid of the colour, but gave up in the end and converted everything to B&W, instead.
Now I'm wondering if this will do the trick.
Guess what I'm doing tomorrow?
Another good one, Unmesh. Blessings be upon you.
reply
Julian
I love this guy! At first, I was distracted by the hair and by what I thought was vanity. My bad. So much knowledge, such a great personality. Such a great presenter. I can't wait to learn whatever he presents next.
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I love this guy! At first, I was distracted by the hair and by what I thought was vanity. My bad. So much knowledge, such a great personality. Such a great presenter. I can't wait to learn whatever he presents next.
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Rowland
Hello brother, this is the_trichy_foodie. Sometimes when i take a flat picture of my food, I get the glare from the light on my food. Can you please post a tutorial to remove flashes and light glares in the food.
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Hello brother, this is the_trichy_foodie. Sometimes when i take a flat picture of my food, I get the glare from the light on my food. Can you please post a tutorial to remove flashes and light glares in the food.
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M0nte
You can do the same thing with white balance. Just make New Adjustment Layer > Levels and then pick with the white eyedroper the color on her earring. Finished. For that use the divide mode is overly complicated.
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You can do the same thing with white balance. Just make New Adjustment Layer > Levels and then pick with the white eyedroper the color on her earring. Finished. For that use the divide mode is overly complicated.
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Octane
I tried an example similarly how you did. But the values arent matching the resulting colours, i checked wether i selected proper colour. but my answer for the formulas are wrong and not matching RC
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I tried an example similarly how you did. But the values arent matching the resulting colours, i checked wether i selected proper colour. but my answer for the formulas are wrong and not matching RC
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tonkaGuy
Brilliant. I was a commercial photographer for almost 30 years and used Photoshop nearly every day, but didn't know this. Would have saved hours of CC time. Never too late, I guess, so thanks!
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Brilliant. I was a commercial photographer for almost 30 years and used Photoshop nearly every day, but didn't know this. Would have saved hours of CC time. Never too late, I guess, so thanks!
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yang
Maybe the formula is 255/(a/b), and the result is integers, 1 digits after the decimal point rounding the numbers up or down which is according to the rounding numbers - rules
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Maybe the formula is 255/(a/b), and the result is integers, 1 digits after the decimal point rounding the numbers up or down which is according to the rounding numbers - rules
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Lucy
These tutorials make me think about how un-experimental I've been with Photoshop for all of these years! Love them. Thank you for the know-how and for brightening up my play!
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These tutorials make me think about how un-experimental I've been with Photoshop for all of these years! Love them. Thank you for the know-how and for brightening up my play!
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Mike
Fantastic lesson but what if there is no area that should be white. Can we mathematically back into the layer color. Doesn't seem like it but math is not my friend.
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Fantastic lesson but what if there is no area that should be white. Can we mathematically back into the layer color. Doesn't seem like it but math is not my friend.
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Mayank
Bro My Photoshop cc 2015 Has no Oil Paint feature.
Please tell me how to solve this problem.
Can I use any other feature instead of Oil paint?
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Bro My Photoshop cc 2015 Has no Oil Paint feature.
Please tell me how to solve this problem.
Can I use any other feature instead of Oil paint?
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JOSE
Turn white (in a dress) in any other color with a solid color layer under the white dress layer and change the layer with the dress to Divide. Use a mask.
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Turn white (in a dress) in any other color with a solid color layer under the white dress layer and change the layer with the dress to Divide. Use a mask.
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ZapPack
So if I want to divide out a color from an image with transparency in it, how do I make it do that without effecting the opacity of any of the pixels?
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So if I want to divide out a color from an image with transparency in it, how do I make it do that without effecting the opacity of any of the pixels?
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Sucube
The challenge is keep learning Photoshop, Illustrator and After Effects to find a better job in my shit country. Thx a lot PIX. Nice intro by the way)
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The challenge is keep learning Photoshop, Illustrator and After Effects to find a better job in my shit country. Thx a lot PIX. Nice intro by the way)
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itech
what I see is that the brightness has increased. So along with the correction, we have more brightness. The point is to change the color to white
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what I see is that the brightness has increased. So along with the correction, we have more brightness. The point is to change the color to white
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Hassan
your tutorials are music to my ears. I am a technical writer not a designer, but I make sure to watch your video before starting work
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your tutorials are music to my ears. I am a technical writer not a designer, but I make sure to watch your video before starting work
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Yogi-Ni
Thanks Unmesh! Another worthwhile tutorial! I'm amazed that there are 100 (so far) down-votes! Who are these rascals, er people?
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Thanks Unmesh! Another worthwhile tutorial! I'm amazed that there are 100 (so far) down-votes! Who are these rascals, er people?
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