I have a series of grayscale images that I'm trying to adjust so that they all have the same--or at least very similar--contrast, luminance, and brightness. When I try to adjust these things, it's always measured relative to the images's starting state rather than to anything objective.
View 1 RepliesI have 18 pictures that I want to have, for research purposes, EXACTLY the same luminance. The pictures are cut out faces and the background needs to stay white.
View 6 Replies View RelatedWe're trying to make some visual stimuli for an experiment, and we want to change the hues of the images while keeping the luminance value constant. However, changing the hue always changes the luminance as well. Is there a way to lock the luminance value?
View 3 Replies View RelatedSay I have an image where I'm attempting to extract a mask from and I've found that one of the channels will serve as a good starting point. Further suppose that I have found that I want to increase the luminance level of pixels in the range of 60 - 65 by 10 luminance levels each:
i.e. all pixels with luminance values of 60,61,62,63,64,65 would, after the operation have luminance values of 70,71,72,73,74,75. Is such a thing possible with Photoshop?
How do I match different audio tracks to slected groups of pictures in a slide show?
View 4 Replies View RelatedWhat is the effect or process to, for example, ensure that normally washed out bright background on, say, a sunny beach, has same depth and contrast as the darker subject in the foreground? It is an unnatural state since your eye and most cameras will adjust to one extreme or the other.
View 3 Replies View RelatedWhat can be done to reduce or alter chromatic luminance qualities in photographic subjects of people (skin tones) and liquids (beverages, water, ice, etc.)?
View 2 Replies View RelatedI'm working on a chart that displays and names a couple hundred color swatches. I have all of their color data in a table, and I want to arrange them by hue and lightness, so I applied the Rec.709 coefficients to my data. This arranges my colors into a natural gradient--except for the reds, which have some glaring misplacement. why .709 coefficients do this, or what coefficients I should use instead?
View 13 Replies View RelatedIs it possible to extract raw luminance values from raw image files? Actually, a de-Bayerized flat matrix would be ideal but could (? maybe) deal with a 3 layer RGB matrix -- rather like the output from dcraw, only in PS. Preferably without gamma applied.
What I'd like to do: I'd like to use image stacking for exposure accumulation using "summation" but find that highlights blow out readily. Right now the workaround is to let the highlights go and bring them back with HDR from one (or more) of the original frames, but that's seriously clunky. I'd like a "scaled summation" where a luminance-dependent scaling factor is applied in the sum. I don't yet know how to get there from here in PS (there's a megaclunky way involving dcraw, Matlab, and a stacking program ...), but it seems to me that the first step is to get the luminance info.
I have a set of 25 images that I need to equate on luminance. That is, I need them to have the same luminance mean and distribution. Is it possible to do this using Photoshop? If so, what are the steps?
View 1 Replies View RelatedI'm trying to get every pixel value in the black square to 000, and all the white pixels to 255,255,255. I've started out with an 800 pixel square solid 255RGB square and then applied a solid 0RGB black square over the top in a new layer, but as can be seen by the color pickers PSCC is doing an unwanted luminance blend around the edges.
Is there anything I can do to stop it and get a solid black square on a solid white one?
I have a Dell 1907 FP Flat Panel Monitor. The controls include a 'Brightness' adjustment. I am trying to set the monitor so that I have a luminance of between 100 and 120 cd/m2. I am using a Spyder 3 Pro display calibration device to set the luminance but the device does not measure luminance. Can anyone tell me what Brightness level my monitor should be set at to achieve a luminance of 100-120 cd/m2?
View 37 Replies View RelatedWhen I try and apply a channel to an adjustment of my choosing, I get a red mask across the whole image and the alteration is global as opposed to the selection of the mask if that makes any sense? [URL] ........
View 7 Replies View RelatedI want to do some Luminance Smoothing on only the sky, in Lightroom 4. I don't think it is possible so would like to know how to do it in Photoshop if it is possible there?
View 6 Replies View RelatedI've occasionally created some tone-mapped pictures from multiple exposure brackets using the Luminance HDR program. But when I import the jpegs exported from Luminance to Xara, their Red and Blue channels appear to get swapped.
I can fix it by using a Live Effect. But why does this happen? Is there a way to losslessly avoid this before importing to Xara? Because Live Effects impose their own resolution limitations on the image.
I use quite heavy Luminance noise reduction on my images as they are shot at very high speed ISO...
I adjust this in L4, picture in preview looks as smooth as a babies bottom and perfect...
I then export as a TIF file at Adobe 1998 and when I open it in Photoshop 5 the image is really noisy like I've not done the adjustments at all...
I use a 17inch Macbook Pro with the lastest operating system, this is the second performace issue over the last few week (problems with LB too)...I export my files manually using a card reader as RAW files, from a Canon 5D Mark 3...
Is it worth re-installing?
Basically exactly how layer masks behave, except I would like to be able to have full non-destructive editing control over the masking layer (e.g. have it as a smart object). The problem with layer masks is that (AFAIK) only destructive editing is possible.
What I'm after is effectively the same as what a 'luma matte' does in After Effects. Is this at all possible in PS?
what is the best method for adjusting brightness and contrast in CS6? Is it by simply adjusting the Brightness / Contrast properties in an Adjustment Layer or is there a better way of going about it?
View 3 Replies View Relatedhow I can remove this person with her hair intact from the background?
View 2 Replies View RelatedI use Photoshop CS5. When i try to adjust the contrast of a picture, or brightness. It shows the desired change in the Preview. But when i click OK, the picture is not affected.
View 1 Replies View RelatedQuick question: If I am creating a black line drawing with a brush, how can I ensure that I will be able to alter the contrast later on? Sometimes it seems to work, other times not at all (i.e. if I open the histogram, it shows just one line all the way to the left; the lack of colour suddenly becomes an issue).
I like to use a soft, slightly opaque brush at first - which with the tablet gives it a nice range of pressure, but then usually I need to up the contrast at a later point.
I'm using PS CS6.
how to blend in the image so the contrast is smooth (even).
View 2 Replies View Relatedhow do i go about increasing a finished products contrast without losing its color values? you know, i don't want it to look completely faded. is there any way around this?
View 1 Replies View RelatedI can go to Brightness/Contrast click on it and get a window that will allow me to adjust the Brightness/Contrast using sliders.
when I use Brightness/Contrast it will give me an eye dropper tool?
How do I get my Brightness/Contrast working again? I've reset my pallet locations and even re-installed the software.
When I'm using the pen tool in Photoshop CS4, it sometimes takes the color of what I'm using the pen tool on, ie; if I'm working with a picture with a bright green or pink, the path is bright green or pink (see link below) The picture isn't the worst that it does, but if I took a screenshot when it's at it's worst, you wouldn't see anything. I went through all the preferences and saw nothing. I do have the OpenGL acceleration turned on.
View 1 Replies View Relatedhow to add light and contrast to the background only so i can make the main subject pop out. So how can i add brightness-contrast only for the background.
View 5 Replies View RelatedI add a noise filter too the whole pic and then do brightness and contrast,the preview looks alright, press ok and the noise dosent change at all
View 5 Replies View RelatedIt's a small issue, but one that was a no brainer in CS5 - I use Legacy Brightness Contrast about 80 times a day, and CS6 no longer keeps it ticked, I have to manually enable it every single time, and by about the 57th time of having to do this every day, it becomes a more than a little irritating. As some of you will remember, CS5 just kept it ticked once you selected it.
The new brightness / contrast is great for certain tasks, not so great for others. I, and I'm sure many others rely on the legacy version.
I edit a photograph from a Camera Raw file to high contrast, grainy black and white, then when I try to flatten it or save it, it washes all the contrast out completely. When I try to merge layers, flatten image or cmd+opt+e/cmd+opt+shift+e to a new file it does the same thing. Here's what I've tried to correct the issue:
-I've tried saving it as a PSD file, a TIFF, a JPEG and a BMP file
-I've tried calibrating my monitor (X-Rite i1 Pro)
-I've tried soft proofing on and off (left off for now)
-I've tried resetting my colour settings to import files into the working space as ProPhoto & Adobe RGB 1998
-I've tried setting the import as the calibrated settings for the screen rather than ProPhoto or Adobe RGB 1998
-I've checked that all files (apart from a Dodge/Burn Layer which has to be on Soft Light never affected any files before) were set to normal
-I've tried converting profiles from ProPhoto to Adobe 1998, Adobe 1998 to sRGB
-I've tried going to preferences in User>Me>Library>Preferences>Adobe Photoshop CS6 Settings and manually resetting all relevant references
-I've tried flushing and resetting all preferences
-I've tried to uninstall and install Photoshop SC6 from scratch
-I've tried restarting the image from the raw file with the new install of CS6, done all the edits again manually...
And it still does the same thing. Whenever I have adjustment layers on my file and have some contrast added that I want to save, it flattens the whole image out..The last attachment is what it looks like in photoshop and another with my colour settings for the (calibrated) screen
Brightness/contrast only seems to have an effect on the 'background' layer--not on any subsequent layers I apply. And it only seems to be on the current docs that I am using--if I open some older ps docs from the recent past, brightness/contrast works fine on all layers...?
View 5 Replies View RelatedI try to apply Levels & or Brightness & Contrast settings to an image, it always seems to revert back to the way it was. The filters won't do anything it seems. I have Adobe Photoshop CS2. At home it did the same thing and I re-installed Photoshop only to find out it still did not work.
View 4 Replies View Related