On a number of tutorials in Photoshop User and elsewhere I've noticed when the curves dialogue is brought up there's a histogram laid in the background of the curves manipulator, but I don't have that. How do I get that histogram? I use CS2.
View 2 Replies
I am preparing a batch of images for test submission, for a stock photo library.Recently a person working for one of the visual effects studios in London happened to tell me that these strict agencies use some set of layers that can separate tonality and color values to check for banding, dirtiness, noise and all those technical flaws that the human eye can't notice on a monitor.He said they perhaps have an action for it so that they can review faster.
He said that it is known as 'Craze Curves' or 'Visibility Curves' technique.He further added that all the studios use it before giving the final files to clients so that there is no issue in printing afterwards.It is sort of a quality control check and has been used by digital and advertising agencies all over the world.
But now his email seems to have changed and I can't get in touch with him to know how to use the technique.
Does anybody knows wich was the first PS version to include this window? silly question but I cant find it in version 7, I think the one with the eye in it´s logo.
View 2 Replies View RelatedI sometimes see a razor
thin line on the right edge.
Is that clipping?
I mean it very clear when I see the mountain slamming up to the right, but many times I see a normal mountain rise and fall, and then seem to see this razor thin blue green or red line on the right edge.
about cs6 , why the histogram is always set to colors? i mean is a bug like cs5 it should be set by default to rgb
every photo i load it's always set to colors and i guess there is not option to save and have rgb by default.
Other than using the PrtScrn procedure,
way to save/copy the histogram of an image?
I am using the histogram function in PS CS4 for Windows. I am using the magic wand tool to choose numerous "green" elements (for example). As I choose more and more elements, the pixel amount goes up in the histogram table. For some weird reason, when I choose enough elements to hit around 50000 pixels, the amount reverts to 12000 and goes to "cache level 2". I need to be able to have a total of all my elements for the project I'm working on. Is this a memory issue? How can I increase the cache?
View 1 Replies View RelatedWhy the histogram for a gradient is not flat, as I guess it should be? Or, how to make a gradient that results in a flat histogram (that is, with the same number of pixels for each level)? The screen capture annexed should clarify the subject.
View 4 Replies View RelatedFor a research project, I am calculating the area of the cytosol of a cell by finding the total cell area and subtracting the total nuclear area. I have been using the lasso tool to select the boundaries and then the histogram to measure the total pixels in that selection area. Proportionately, the nuclear pixel area should always be smaller than the total cell area since the nucleus is inside that cell. Most of my measurements have been accurate, but I started to run into the problem in which occasionally the nuclear pixel area is larger the total cell area. This does not make sense, which means that Pixel # that the histogram records must not actually be counting every pixel. I have tried to do some reading online and it sounds like the histogram is made based on different color intensities. If that were the case, that histogram pixel count is not the total area of the selection but rather only the pixel count that is being used to calculate the histogram.
I have tried changing the Channels from grayscale to RGB, etc. to see if that might use more of the pixels but there is no difference. What is the difference in these measurements and how can I make sure that the histogram counts every pixel?
Also, once I have that issue figured out, to convert my pixel count to a cell area, do I use the equation
A=P/s^2?
A=real cell area
P=pixel count
S=linear pixel/cm.
I have a bar scale from the microscope on the bottom of each image, thus I can accurately find this variable. I would have to square it since I need the area. Does that look correct?
When using the Hide function on the Crop tool I understand the pixels are hidden and the info retained. My question is does the Histogram palette look at the 'big picture' on the Hide function, and the histograms in either Levels or Curves only look at what is visible?
I'm guessing this is so, but was wondering if someone could verify it. I ask because of the difference in the histograms when using Levels or Curves compared to the Histogram palette.
How do I get Photoshop to open with floating windows and the histogram in compact RGB mode? I have to reset this every time I open a new photo. I can't believe how hard it is to change modes in the histogram.I have to undock it, change it to expanded view, change the mode, change it back to compact view and redock it. This made sense to someone? I tried saving the workspace.
View 1 Replies View RelatedI am trying to collect the mean, median, and mode of the RGB color values for a lot of different images.. Instead of just exporting the histogram raw data, I would rather just export what you see in the 'statistics' window when you open the histogram window.
Also, if I just wanted to transcribe it myself, I am not even able to keep the histogram window open while typing the data in excel.. So I constantly have to click back and forth (or just get better memory)..
I use the histogram feature in PS to figure out how many square feet of yarn I will use in a rug that I am making (I work as a rug designer). I am running into a problem with this which is scary because my numbers have to be accurate.
As an example, I may have a 9x12 (inch--this is later blown up to feet using a transparency) drawing. In the drawing there may be 45 organic looking shapes that will be green. I use the magic wand tool and choose all of these green shapes. What I am noticing is that once I get to a certain number (not always consistent) in the histogram reading it will all of a sudden change to a different number and go to (for example) Cache 3. Because of this I have no idea if my histogram reading is accurate.
Is this some sort of memory issue? How do I prevent this from happening so that I can get an accurate heading?
I was investigating something else, and I saw something not working... I'm under the distinct impression that the Histogram panel should automatically update after every operation. Having the Histogram panel displayed full-time on the screen, it should always be up to date.
However, when I Dodge or Burn or even paint color on an image, the Histogram is not updating. If I select one of the History states I've just created, it updates.Consider this simple sequence of operations:
I'm able to reproduce this failure in Photoshop CS5 as well, BUT NOT IN CS4 (it updates in Photoshop CS4 after every painting operation), so clearly it's not a new bug, though somehow I've managed not to notice it in my years of using Photoshop CS5.
Is it broken like this for everyone in Photoshop CS5 and 6?Could this be some twisted attempt to try to optimize painting performance? If so, why isn't there an option to allow a user to request it to update on every operation on a fast computer with cores out the wazoo?
I prefer leaving my histogram in Photoshop CS6 in RGB mode, yet everytime I close the program and re-open photoshop, it defaults to Colors when I open a new document. How to get it to retain the RGB readout as a default?
View 7 Replies View RelatedI found out on cs5 there is a histogram equalizer with in hdr toning...I also found out that there are plugins for histogram equalizers. I did download one called kamflex it was ok but it was noisy. From my learned friends on this site can you recommend others and if so where is the best place to get them.
View 1 Replies View RelatedI'm currently recording the median luminosity and standard deviation of luminosity values in various photographs. This has been an ongoing project so I've been working on it for probably the last 4 months. Today I resumed my work and had to go back and check a previous photo that I had already recorded luminosity values for and noticed that the luminosity values that I had originally recorded were different than the values I'm seeing today in the histogram.
The attached picture shows the histogram I'm using (and have been using since I started this project). It is showing a median luminosity and standard deviation of luminosity for a photo that originally gave me this median luminosity value: 75 and this standard deviation: 27.87
I accidentally changed some setting in photoshop that affected the luminosity readings, or if the luminosity values of a photo are estimated by photoshop and thus aren't always the same etc. ?
Recently I noticed the histogram in PS4 displaying color channels instead of luminosity. And all three RGB colors seem to spike off the top of the window. Is there a way to only display the luminosity histogram curve? Also, how often would be considered normal to have to re-set preferences?
View 6 Replies View RelatedHow can I save my raw histogram data in order to export it to something like excel?
View 1 Replies View RelatedSince I capture my images in RAW, when I open them in Adobe Camera RAW (via Elements 11), what information is displayed in the image and the histogram I see?
Is it showing me the jpeg created in the camera? If so, the jpeg settings in my camera are not only important in viewing the LCD and the histogram in my camera at the time of capture. They would also be important in viewing my image when it first opens in Adobe Camera RAW.
I am working on a research project that involves evaluating the relative abundance of various colors in a leaf. The leaves that I am working with have three distinct sections of color (green, burgundy, and coral).
I have scanned images of the leaf samples on a flat bed scanner (all with the same quality) and am using the magic wand tool to determine the total pixel count of the leaf and the total pixel count for each individual color. With this data, I determine the relative percent of each color within the leaf. Code:
I live in the American Southwest and during the summers here the light is very harsh, the skies are usually completely clear and there are few, if any, shadows at mid-day. A couple of days ago a large red-tailed hawk had landed on a tree near where I live and I had the chance to shoot a lot of (Canon 7D) RAW images of the hawk with the bright sky behind. After processing I found I was not happy with the way the photos came out with my usual photo software (Dxo and Elements , so I re-installed a copy of PSPP X3 on my computer and thought I would try to use layers to darken the sky without darkening the hawk (if I can figure out how to use layers...).
But I noticed that when I opened the histogram palette that there was no graph display other than what looked like a single stright line (with no width) in the center of the photo. I tried several other RAW photos and they were pretty much the same - sometimes empty, sometimes very, very small curves, but so low on the graph that it was easy to not even see them. I then tried some of the converted jpgs from Dxo and Elements 8 and they seemed OK. Visible histograms with normal height. The other software I have displays the RAW histograms normally. The distribution is not pleasant because there is such a bright background, but the curves are easily visible and of normal height. I began to wonder if there was some issue with PSPP X3 processing RAW Canon cr2 images that might be causing this problem for me.
My PSPP X3 is up to date with all service packs, but I can find nothing of this issue in the knowledgebase.
My Histogram is always gone when opening Gimp. It says "recently closed" but I never close it. I want it to stay open the way it used to.
View 2 Replies View RelatedI am fairly new to Gimp, but love it. I am a marine biologist and I would like to use this program for my research. I do need to export the histogram values as I need to do some calculations (pixel count and value). Is there any way I can do this?
View 7 Replies View RelatedI created a catalog with smart previews from my PC (Win 7, 64 bit) and copied it onto my macbook pro (OSX 10.9.1) via a thumb drive. I can view the photos fine, zoom in and use the develop controls. However I get no histogram, cannot export and below the histogram it just says 'photo is missing'.
The whole point of this exercise was to choose and export lo-res selects to customers when out of the office. I can't do that.
In LR5 when I go to use one of the 5 zone adjustment areas in the Develop module histogram, there is a 2 - 2.5 second delay before I can use them for each image. The individual sliders below, e.g., exposure, contrast, etc, don't exhibit the delay.
This is not the case with LR4.4... and it is a cause of frustration for me due to the slowdown in my wedding workflow. I'm on a Mac Quad Core, 12 GB, SSD, etc, so I'm not sure what the problem is, as I said there's no problem with 4.4. I searched but did not see this problem listed. Also, LR 5.2RC does not fix the problem.
When I choose "Enable Profile Correction" in Lens Corrections panel in develop module, the histogram changes as well as the image itself (gets brighter).
I do see the image change as it applies distortion correctly as well. I go back and hit reset and try again and always happens. I have only noticed this with my Nikon D600 with the kit lens. It did not see this with my D90 - no histogram changes,
This occurs in LR 4.3 and just upgraded to LR 4.4 to see if it was fixed.
The histogram looks normal.
The histogram after selecting the lens correction. The histogram changes plus the RGB looks too symmetrical as well.
Interestingly, I changed it the Make to Canon and it went back to the original settings. I checked other cameras and some behaved like the Nikon. I also went through various len models and some show this histogram fix with some lenses and looks normal with others.
The histogram clipping triangles disappeared in the Develop module. Upgrading from LR 5.2 to 5.3 did not solve the problem, and I can't find an on/off toggle in any of the support sites.
View 1 Replies View Relatedwhat is the purpose of the histogram display on the adjust pane. can it be modified from there? Also - what is the purpose of the four boxes below the histogram display?
Together they take up too much real estate to be there just for looks .
I just wanted to say that it appeared sometime in X5. I didn't install X5 until SP3 was available. I don't know if it first showed up in one of the SPs since I only ever installed SP3. In X4, I work with the Histogram Palette docked below the image at all times so I can monitor what is happening as I work within the various adjustments. If I check/uncheck the "Preview on Image" box, I can toggle the differences on the histogram as I work. This is invaluable functionality. I depend on it for my work. [I wish the Histogram window would give me readouts of Histogram values when I place my mouse over the Histogram window, but that is an enhancement request for another day.] Now with X5, I can ONLY dock the Histogram window over on the right side. This is about the most braindead place for it, as the width is extremely limited, which limits the scale at which change information is displayed to the point of being useless. Seemingly more braindead, while docked, the only dimension in which the Histogram can be expanded without sacrificing image preview size is vertically. Corel has taken what was a very useful tool and rendered it mostly useless. Knowing this is also a problem in X6, I will not be purchasing that version unless it has been fixed, which I gather has not happened yet. I tried to Save an X4 Workspace and Load it into X5, but X5 cannot even open an X4 Workspace. I guess Workspaces are another USELESS "feature" since Corel seems not to preserve basic function across Revs.
View 3 Replies View RelatedAnother problem, this one since installing Service Pack 1.
The histogram is missing from the histogram adjustment window. Everything is there and works but no histogram. How can you adjust it without histogram? What is up with this? It works in x2.
