I was wondering if anyone was familiar with algorithm used to Color Balance.
I'm interested in automating a process which includes Desaturating and then Color Balancing.
I solved the Desaturation (take the highest number of R G B, divide by 2, apply to R G B values of pixle.)
I am curious to know how a pixle would be modified by say, +100 Blue in Lows/Mids/Highs
I know you are all going to say "it depends on the lighting" or "there are different skin tones", but I just need a simple starting formula, of which I can edit to work with the lighting. I just need a simple, generic caucasian skin color "Color Balance" formula, which can be applied to a monochromatic image.
View 3 Replies View RelatedI want to use a color balance layer with a vector mask to change the color of a shirt to come as close as possible to matching a particular color swatch. So, say the color swatch is RGB, 101, 164, 33
The color balance has the 3 sliders and I can adjust:
cyan -> red
magenta -> green
yellow -> blue
Is there a way of converting the RGB values (or CMYK values) from the swatch that is not trial and error that will tell me where to set the 3 color balance sliders to match the swatch color?
Have a photo of inside of bus, seat covers etc. Color comes out bold, very little black, I can't find a balance, where I have a fairly normal, but lighter black halftone, with an overlay of color.. (Old copy of PS 6) I know, ancient, but it works.
View 1 Replies View Relatedi use a few tutorials and they say about colour balance, can i get that in elements?
if not is it possible to port it from another version of photoshop or is there a plug-in for it?
Suddenly when applying a color balance adjustment layer I'm unable to click on the shadows, midtones, and highlights. They are each grayed out and I'm only given the option to apply the setting overall. I'm thinking I must have made some kind of setting change somewhere for this to happen.
The images are RGB 8bit color mode.
I have a question about color balance. It seems it's the only one that the drag and drop doesn't work. It's my pc , or is the default?
I added 2 screenshots. i added a red arrow to let you see the mouse pointer in the first screenshot i can drag and drop (i'm not talking about the sliders) in the second screenshot , ONLY color balance (and it's very WEIRD ) i can not drag and drop.
I'm under w7 , tested under 64 and 32bit .don't know about mac.
I made a ring and I want to change the color using color balance. It's with particular, multiple copies with fast blurs applied to them to give the glow and it's all pre-composed with the particle layer. Now all I want is to change the color as a whole but color balance doesn't seem to work when applied to the pre-composed layer. I even tried color balancing the particle layer itself, made an adjustment layer and applied color balance on that.
View 1 Replies View RelatedFirst, a slightly long winded explanation. Shooting the creative family Christmas card this year in a Mini-Cooper (original 60's one). Basically set my lighting up and then shot individual members in the car to post them together. The only snafu - my 20 month old son wasn't exactly cooperating, so the 'good' photograph I have of him is in the drivers seat, and I wanted to move him in between us.
There were a few difficulties here. First, the light changed between originally shooting my wife (windshield was clear), as skies were blue, and when I took the photo of myself nearly an hour later (cloudy skies cast a glare on the windshield. I had a black scrim set up to the side which worked, but wasn't able to knock it out all together. So i faded the clear windshield from my wife's side over to my side with the glare, but I feel that looks fairly natural (or at least good enough for the Christmas card).
The trick comes with my son - I cut him out from where he was at the drivers seat (had to do some shoddy work on his shirt where the steering wheel blocked him), and put him in between us. However, it looks like his coloring is off from what we are - and I can't quite seem to get it right. Color balance is definitely not my strong suit in PS.
I work in crop research and have written a code to analyze an RGB image and determine if a pixel is senescence, crop, residue/soil, or shadow. However, this only works if the color is balanced in an image.
I do not know what the technical definition of balanced color is, but to me it relates to the RGB curves one can see in the curves mask. Over the last 5 years a colleague of mine has taken thousands of photos that I need to analyze with my system, unfortunately some have blue hues, some are overexposed, and some are just flat.
Is there any way to apply ratios or mathematical equations to the curves panel so that all images have a similar balance that will work with the code I wrote?
(below I included a few images to give you a feel for the variance)
When I try creating a color balance adjustment layer is it opening a levels adjustment layer. I'm using the New Adjustment Layer button at the bottom of the Layers panel. Is this a bug with CS6? How can I fix the problem?
View 10 Replies View RelatedI'm using 2 different images of 2 different people, and layer masking features from one person on to another. I tried using a Color Balance Adjustment Layer..
1. Should I be adjusting the midtones, shadows or highlights?
2. I added a little bit of red, is there ever a time when you might add add magenta or green to blend skin tone? What about yellow or blue?
3. Any other general tips for doing this?
I learned from Scott Kelby's book on a technique to remove color cast.
What is the difference between color cast and correcting white balance?
As you can see by the spelling of "Colour", I'm outside the USA!
A bit of background: I graduated in photography a couple of years back and I've used PS6 and now PS7 quite extensively. I use an Epson 3200 scanner to scan my medium format (6x7) and large format (5x4) negs and trannies (that's FILM trannies...not the other kind!). If they are for exhibition, I'd burn them to CDROM and get a digital lab to print them for me otherwise they'd get printed on my Epson 760 (yes, it's quite old now!).
I've always had issues getting the screen calibrated. How would you guys go about correcting the relationship between the scanner/screen/printer? The screen is a Viewsonic E70 and I use the E70 profile.
I cannot get a color balance adjustment layer to come up. Every time I do photoshop creates a levels layer. Selecting levels makes a levels layer. All of the other adjustment layers seem to be working normally.
How do I fix this? I have a deadline and no time to be reinstalling photoshop.
Editing a video in LR4 you can capture a frame, adjust the color, and save a preset to apply to other videos. BUT the frame capture is a jpg so you can't specify a color temperature; you hve to use the slider(s) and cross your fingers. I have two consecutive videos, one shot with AWB and the other set to Shade. I need to adjust the AWB shot (very cool) to match the Shade shot (very warm). There are so many sliders, I can't even get close to matching them.
View 1 Replies View RelatedI am trying to use Color Balance and the window doesn't work. The only part that shows is the "Enhance Color Balance" box, the words "purple" and "green" just above, and the preview arrow (which does nothing) and "preview on image". Preview on image is checked and it does show changes but I am unable to uncheck it. Nothing else shows. Nothing I have tried has worked, including restarting the computer.
View 6 Replies View RelatedI'm running Revit Architecture 2012. I did a render and it looks fine in the default {3D} View. I selected to save it to the project and when I go to the renderings view to recall it, the color balance is all shifted off way way to the blue end. I tried going back over to render dialog and adjusting the white point all the way up, and it had the expected effect in the {3D} View (shifting everything to overblown orange), but nothing changed at all in the renderings View when I tried to resave it after making the adjustment.
View 3 Replies View RelatedWhat is wrong with my GIMP? This behavior persists in every 2.6 and 2.8 build I've tried, in fact I'm pretty sure I first discovered it somewhere in 2.4 .
It's GTK bug #644032 - certain adjustments made to the Hue-Saturation tool (with overlap) may have problems handling the red/magenta wraparound properly. Which was supposed to be fixed eons ago (and with exception of this one specific usecase, it already WAS - see GTK #527085).
It originally happened while trying to adjust the color balance on a scanned image containing ambiguously red/magenta hues (yes I know we have an actual tool for Color Balance, but I've never been able to quite wrap my head around what adjustments yield which results). I have attached a sample file demonstrating expected vs. actual results with this usecase. My GIMP is clearly screwing the pooch on these adjustments ... but HOW, because even when I browse the online git repo the relevant source code looks like it should work perfectly (I've even mentally stepped through it and verified correct results, unlike my actual GIMP).
Try performing the same adjustments on your GIMP (note which build and version) - do you get the same results I do?
When I use Adjust --> Color Balance and use the temperature slider the cool <---> warm seems to work as expected (i.e. my image becomes more blue to the left, more red to the right).
When I click the Advanced Options box, the slider labels are the same, but the behavior swaps: so the Cool label is still on the left, BUT when side the handle to the left, my image becomes more RED, & if I slide to the right (labeled warm) my image becomes more blue.
I've got two different color balance problems. The first is where I have two photos that I want to match the lighting in each.
The second is where I have a 'control' and I want another photo or print to 'match' it.
Currently I'm having the second problem. A customer brought in an original painting for us to scan and make holiday cards from. But they also brought in a photo print from a local chain and they have asked me to match the color representation from that print.
It is duller, the blues are purple and it is over all darker. Personally, I think the photo is a horrible representation of the painting. BUT IT IS WHAT THE CUSTOMER WANTS.
I've scanned in both the photo and the original drawing. If I print the photo it matches the color of the scan. (but is the wrong crop size and can't be used for the card.) How do I draw color out of that and get my original to 'match' other than just using my eyes? (which is about impossible for me today) I normally use 'sample/target balance' in corel PhotoPaint, but you can't do that between two layers OR between two files. This would be a great change to make in x7 or an update.
Current System: i3 3.07ghz, 3gb ram, Windows 7 32 bit with all updates and X6
I have PSPx4. If I select an area of the image and try to apply color balance (Adjust|Color balance), the effect gets applied to the entire image, not just the selected area. Is there a way to apply color balance to just a selected region?
View 5 Replies View RelatedI am trying to come up with a script for batch processing since i have 800 pictures that need editing.
(define (do-many dir) (let* ((files-list (car (cdr (file-glob dir 0)))) (do-one (lambda (f) (gimp-color-balance)))) (plug-in-color-enhance RUN-NONINTERACTIVE image drawable) (plug-in-unsharp-mask RUN-NONINTERACTIVE image drawable 5.0 0.5 0) (map do-one files-list)))
Now i tried this in the console but the script stops no matter what part i try to fix.
I am an underwater photographer and white balance is an important issue. I was advised to set the white balance in my camera (Nikon D90) to the color temp of my strobes ( 4800 K) so my subject lighted by by strobes would have the correct color. When I import the RAW (NEF) file into lightroom I would expect that the color temp shown in develop mode would be 4800 K.
Unfortunately it is not. It even differs from picture to picture. I would like to know why and if something can be done about this?
9.0 CS2, but it is not so important, because the questions are fundamental.
Gradient Overlay
1. Look at the gradient settings scale. Why gradient isn't stopped at the second opacity stop and go on till the edge of the settings scale? After all, following the logic it’s the opacity stop and the gradient filling have to be stopped at it. That is to say If the logic of gradient algorithm is next. Filling begins from the left edge of the settings scale and stops at the first opacity stop(this filling is initiated by first markers). Then it continues since first markers and stops at the second opacity stop(this filling is initiated by second markers). But in practice filling continues since second markers also, though there is no third markers which initiate it.
2. Why second markers are necessary(they can’t be deleted)? I can suggest if second markers would be deleted and the first would be moved to position of the second, we would got the same gradient preview. Of course if the filling begins from the left edge and is initiated by the markers as I wrote above.
3. User color – you can set fixed color, which you can choose for the future in a dialog window. The window can be called via click to the pointer near the color icon.
When I click the pointer I see only one window where are three text items – foreground, background, user color. All is clear about foreground and background, they are set in two squares in the tools palette. When I choose “user color” there is no any window is appeared which have to contains at least current user color icon, color picker window, and buttons that allow to tune and apply user color: “set as user color sample” for picked color, “use user color sample as user color”. So how I can tune and choose user color?
Gradient:
4. I use gradient tool from tools palette. I spent it since canvas top edge till guide line. What is the gist of spending it for a specific distance? Why the color of first color stop fills the space till the guide line changing and stops at some light blue. And then monotonically fills with it all distance from guide line till canvas bottom and have no any opacity changes at bottom. Although it have to have some opacity changes because them present in the end of gradient settings scale.
I read an interesting technical article today about the development of JPEGmini algorithm, that supposedly will provide lossless compression, and can be read by any current software that reads a jpeg file. THe article is rather technical, but that is good, as it sounds like a real deal rather than a magic concept. Give it a read and post your comments on JPEGmini. URL....
Here is a couple of excerpts:
Q: How does the JPEGmini algorithm work?
A: The algorithms we have developed, on which we have filed 14 patent applications, simulate the human visual system. Our technology analyzes each specific photo, and determines the maximum amount of compression that can be applied to the photo without creating any visual artifacts. In this way, the system compresses each photo to the maximum extent possible without hurting the perceived quality of the photo.
Q: How much compression does JPEGmini enable?
A: Our technology can reduce the file size of photos by a factor of up to 5x without hurting their quality. The amount of compression that our algorithms apply varies from photo to photo as mentioned above, but you can estimate the average amount of compression according to the photo resolution, as described in the following table:
Photo Resolution Average File Size Reduction Using JPEGmini 8MP and more70 – 80%5-7MP60 – 75%3 MP50 – 60%2 MP30-50%1024×76825 – 35%800×60020 – 25%640×480 or less10 – 20%
I'm trying to implement some effects in C++ for my user interface controls. I've figured out that Photoshop Layer Styles uses an anti-aliased form of the Euclidean Distance Transform for "Precise" techniques (Inner Glow and Outer Glow).
But what is the method used for the "Softer" technique for Outer Glow and Inner Glow? It seems this is also used for the "Smooth" technique when computing the height map for Bevel and Emboss.
I usually use feature to bring details out from shadows. I worked very well for me but it seems the way the function works was changed in Photoshop CC,
For example, shadows sliders always made dark areas brighter before but in CC the areas often become darker instead (like in attached picture, decreasing radius doesn't make it brighter). Explanation of mechanism behind the new Shadow / Highlights function.
how do i get the drop down box in white balance to allow me to change the white balance
View 1 Replies View RelatedHow to write an algorithm for triangulation in surface modelling ( using Delaunay's method) ?.
View 6 Replies View RelatedI think circle after reduce using mask should stay circle instead of you can get in photopaint.
Steps:
1. make 10px circle
2. make mask from it
3. reduce mask by 3px
4. crop object to mask
system configuration:
Win 7 Pro 64bit, Intel i5-2500, 8 GB RAM, 128 SSD SAMSUNG + 2TB on hard drives.
corel version:
X6 VERSION: 16.4.0.1280
