I'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 RepliesSay 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?
What 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 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 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.
We'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 RelatedI 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 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 Replies View RelatedI 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?
how to use the polar coordinates filter but why is it even though I follow the tutorial exactly, when i go to apply the filter I can't use it along with many others.
would this be a software issue? maybe have to download filters or sumthing?
two things:
I'm using CS3 on a PC. I'm using the wave filter to distort an image. writing down all the characteristics ie, # of generators, wavelength, amplitude, scale ect. Is there anyway to recreate that EXACT wave pattern on a particular image once I've left the program? It seems to generate another algorithm even if I input the same numbers.
Also, I'm distorting an image at 72dpi as a test. When I replace the image with an exact replica at 300dpi and apply the wave distortion, I'm unable to get even remotely the same results. the wave patterns are much tighter. I've moved around all the characteristics with no result.
How do achieve this effect. I want to create tv distortion, but not in the form of noise. Like when things get stretched, distorted, and look all jagged horizontally. Very similar to when you are losing a video signal.
View 2 Replies View RelatedHow do you get the arced text without it distorting the text itself. the tops are bigger than the bottoms of the letters. So your font isn't the same anymore. I am just trying to do a simple arc like cheapo cd label programs do. Straight letters on an arc. Is there a circle text or something i can do?
View 5 Replies View RelatedI recently installed an upgrade from CS2 to CS4 on my Vista laptop. It is fully registered and updated. I seem to be having an issue with Photoshop. Any file I open, jpg, psd, pdf, etc. opens with lines and squares all over the image. I can't quite figure out what could be causing this. I thought maybe video card, but it too is current. I have included a picture to display what I mean.
View 2 Replies View RelatedI remember seeing a video tutorial on fixing lens distortion but I don't remember that video is and who did it. how to fix lens distortion in Photoshop CS4? I shot the photo with a widen angel 24mm Nikon lens. The picture looks somehow distorted.
View 4 Replies View RelatedI'm creating some website banners. They're beautiful. When I save them and open them, they look great. When I link to them on the web, they look awful. They're distorted - badly. I've rebuilt the images several times and each time, I get the same result. Is this a resolution issue?
View 2 Replies View RelatedI'm new to Photoshop. Currently, Im learning Photoshop through Adobe Photoshop CS6 Classroom in a Book. I found out that the camera raw plug-in seems weird.
This is the original photo.
When I opened it in Camera Raw, the color of the photo distorted. ( I didn't do anything on it yet. )
Is it caused by software problems? Or did I accidentally tick something in the Setting/Preferences?
Here are two crops of a banal subject, our dryer and its circular control knob. Both done the same way, but look at the difference. First result, with size 1876x1419, which is reduced for this post, is obviously a distortion:
I wasn't surprised or upset to see this distortion, since I'd seen it many times before. It's easy enough to remedy: just Perspective Crop again. This time the image was 1871x1000, which is much better:
Photoshop, we have a problem! Why can't this be corrected?
Why would images print significantly smaller than designed (I'm referring to the ruler size, NOT the screen size) when the pixel aspect ratio in Photoshop is set to square pixels and 300 dpi? Does Premier or AE reset PhotoShop pixel dimenions on the sly in the Master Collection?
We have a summer intern designing business card size (3.5" x 2") inspiration cards on an old laptop that was used for video production with with the CS3 Master Collection and a CS4 Production Premium upgrade.
The 3.5 x 2.0 cards print out at about 3 3/8" by 1 15/16" on every one of the half dozen different printers we've tried them on, including FedEx Office locations and several different Lexmark office printers. Image size is 1050 px by 600 px, i.e., 3.5" by 2.0"
When we lay out a number of cards on an 8" x 11" sheet and save it as a pdf, and then open the pdf in Photoshop and measure the image sizes, each card clearly measures 3.5" by 2" but still prints in the distorted 3 3/8" by 1 15/16" size.
The smaller print problem persists if we save the images as tif, jpg or bmp. Opening the files and resaving them in CS5.5 doesn't work either. It's a problem with both the CS3 and CS4 versions of Photoshop on that laptop.
It looks like something is forcing the pixels into a smaller rectangular shape but I don't know where else to look to try to fix it.
Our CS5.5 Master Collection Photoshop is doing the same thing, only not as much. I'd like to be able to print the cards close to actual size. The problem persists for 5.5" x 8.5" bookcover designs too.
I'm doing some post production on a CG project, but now that I'm finished and try to save the finished PSD document as a jpg file, the saved JPG image appears both darker and filled with artifacts. And by appear, I mean it actually is.
I have never encountered this issue before, and it ruins the whole image.. which I've spent alot of time on. Im using CS6 and I can't really say I've touched any color profile settings,
Ive taken a pano ( made from 4 images). The image is very warpped where photos join. Ive tried clone tool to move sections of the image up or down but it doesnt really work too well.how to remove teh distortion from this image, its very clear on the horizon.
Image is no way near finished but gives you an idea of my problem.
hi all i have a epson 7800 printer that i print onto canvas 99 % are ok as i do landscapes,sunsets ect i have started doing photos onto canvas people email me the image at 300 dpi then i edit image in photoshop cs3 the problem i have sometimes it looks distorted not all the time sometime they send me a image that is 2x4 inches dpi is 300 when i blow it up to 20x16 inches or bigger it does not look right i know the image should be bigger that they send me is there a way round this so when i blow up a image it looks like it has not been distored i am ok with photoshop as i am learning new tricks evryday any info would be great
View 1 Replies View Relatedi just bought a new wide-angle camera, and there's this common issue that occurs in all wide-angle lens - whenever i take portrait/group shots, people who stand at the edges always have VERY "flat" faces.
View 9 Replies View RelatedEverytime i try to resize(smaller) a picture it becomes distorted. Is there a way to avoid distortion.
View 4 Replies View Relatedtook a couple of photos using a wide angle lens.
Now I need to get rid of some barrel distortion.
How would I go about doing that?
On most photos its the horizon that's disorted.
Have a look at the attached photos.
if PS itself has functions for correcting the distortion.