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 RepliesI'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. ?
is there a way to view the RGB channels luminosity only? It seems I have to shut off two channels just to view one, and that one will be colored (red, green, or blue). How can I just view the channel in grayscale? Is this possible? Do I always have to shut two channels off to view one?
Also, I take it there are no adjustment layers in GIMP, correct?
I am trying to calibrate my screen using gretagmacbeth eye one. Everything works o.k. apart from my colour temprature and luminosoity. The colour temprature is way down approx 10% and so is the luminosit, it is no where near the rcommnded levels. To the extents I have now got a red tint on my screen due to the colour temprature.
So how can i overcome this, can i buy a special lightbulb or kit for the room i work? Or what do I do?
Hican i do a color luminosity mask ?for example for a range of colors or for yellow? may somebody help me?
View 11 Replies View RelatedI know what the documentation says that they do, but it doesn't appear to be the truth. For example, if I take my image and overlay it with a 50% gray layer set to Luminosity mode, I would expect to see the hue and saturation of my image, with the luminosity of every pixel set to 50%, but that isn't what actually happens.
View 12 Replies View RelatedI have a diamond image, which obviously has different shades in it, it actually has dark, like dark brown shades, which i want to change to lighter smth like light yellow, i tried replace color, hue/sat//light but the effect is not realistic like an actual diamond looks, it is loosing its luminosity. i even tried with magic wand tool, by selecting each darker part and changing color, but it does'nt look realistic either.
I m using Photoshop 7.0
If I'm using the color mask and i want to know the luminosity of an image can I use it for Luminosity mask?the reason is PP does not have something as Photoshop.
View 12 Replies View RelatedIs there a possibility to save every color-channel on my document as separate files (cmyk and rgb) ?
View 9 Replies View RelatedThe pictures came out fine. But then I upgraded to a (then) newer version of ACDSee, and the first time I opened the folder with these pictures in them, ACDSee turned them all magenta. ACDSee claims that this is impossible – but I assure you it happened...
I’ve posted one of the pictures here, including a screen shot of the Info pallet while the cursor is over an area of the image. As you can see, there isn’t any info for the yellow or black channels.
My question is – is there any hope for restoring the proper color to these images? I‘ve played around a bit with Curves, Hue & saturation, etc. - but getting natural color has eluded me. [URL]
I have a set of grayscale images that I want to combine such that each image becomes a color channel...
View 1 Replies View RelatedI need to send vectorized art to this company that only uses Illustrator. I have never used or even opened Illustrator. Ok, I'm very familiar with Freehand so I get the basic idea about vector. I have a 3 color logo that I have saved as a Photoshop DCS .eps file with the channels saved as spot colors so I can print separations with Pantone colors. According to what I have translated from the Photoshop guide what I need to do is figure out how to get my clipping paths of each channel to retain its fill when I export paths to Illustrator. I've tried and when I open the vectorized paths in say Freehand there is only lines and no fills. Do you guys have any ideas on how I can get these file seperations to this company with Illustrator?
View 3 Replies View RelatedI have three different pictures in separate files, and I want to overlay them as red, green and blue channels in a new file. (the images represent the different color channels obtained from fluorescence microscopy, and I just want them back in one picture).
I guess it´s pretty easy, but I don´t manage to get all 3 pictures into 1 as 3 separate channels.
Is there a preference in GIMP to display color channels in grayscale? Rather I should ask, has this issue been resolved because I know at one time it was a big difference between PS and the GIMP. And yes, I know that I can decompose and recompose...
View 5 Replies View RelatedI was wondering if there was an easy way to view individual color channels (Red, Green, Blue) in the viewer, and if so what the shortcuts are. I know you can do this simply in flame but can't seem to find a way to do it in Smoke.
View 3 Replies View RelatedIn illustrator, how do you change a photoshop spot color channel that has been imported into illustrator. Ever since Illustrator CS2 you could import a psd into Illustrator and you could ungroup the channels and change the colors. How do you do that in CS3-6? I have been trying to figure this out for years. My old computer with Illustrator 10 is about to die and so will my ability to do what I descried above.
View 1 Replies View RelatedWhat are they used for? I have been using PS for around 3 years primarly for web design and I have never used channels outside of loading a selection. I searched for more info; I mostly got tutorials that use alpha channels, but no real explanation as to what they primarly do.
View 9 Replies View RelatedRevit 2013. I Set up a color scheme for rooms. colors are fine but the colors go to middle of walls (interior and exterior) even tho walls are set to room bounding. Room and area calcs set to wall finish but in plan view and in sheet view the colors go to wall centers. Plotting the colors override/cover wall graphics. Created a quick "dummy" project using masonry walls and it worked fine.
Also, if you link a revit file with additional rooms how do you add those to color schedule? Cant jus add room in host file - says its not properly enclosed. putting room in the linked file doesn't seem to allow room to be read/scheduled/displayed by name/number-just shows the room X with a + sign in middle. Adding color to linked file gets nothing but I want it controled in host anyway.
I'm working with CorelDRAW 12 and am having trouble with a frustrating issue. If I create a logo from my work computer, using pantone colours and everything, the colours are really rich and vibrant. When I open that very same file in Corel at my house computer, however, all the colours display in a pastel, watered down way.
My home monitor is much better than my work one, and if I export the file from work into a .png it still displays as it should, rich and vibrant, when I open that on my home computer. However, if I leave the pantone colours as they are but export it from my house... it then keeps it as the pastel, watered down version on every single monitor. How do I fix this? Is this a monitor issue or a CorelDRAW problem - have I somehow not set up my Corel the same at home?
We all know the invert function of Photoshop, easy and nice (well nor always but will fix this) to invert all colors.... The downside is than this trick will also invert luminosity... Light area become dark and dark area become light, this can ruin an image!
If you wish to invert an image and keep lighting intact the trick is really simple!
1) Open an image to be inverted
2) Duplicate you background layer (or the image layer), this layer will be used as a luminosity mask.
3) Select your original layer
4) Invert you original layer
5 (Optional) Link and Merge these layers
Done!
Trick : If you invert the luminosity(the copy of the original) rather the than original layer, you will inver the lighting of the image... Its also pretty cool!
I have always used the shortcut Ctrl+Alt+~ to get luminosity selection. It always worked in Photoshop CS3 and still does on my computer, but when I try it in CS4 nothing happens and it doesn't work. Do I have a preference or setting wrong?
View 6 Replies View Related1. Duplicate the image which is in RGB mode
2. Change the mode of the duplicated image to LAB color mode
3. Select "lightness" channel in the duplicated image
4. Move it into the RGB image as alpha channel
5. Copy this channel and invert the copied channel
6. Create two HSL adjustments with these two channels used as masks
7. Turn off completely the saturation sliders in the HSL adjustments for desaturating the image
Now, I can not get completely desaturated image after these steps..Is there a leakage between my luminosity masks?
I'm trying to get a better understanding of luminosity masks. Where can I find out just what operations Photoshop is performing when I control click on the rgb composite channel to make a selection (which I then save as an alpha channel)?
My assumption is that the brightest half of the image pixels are included in the selection and the rest are consigned to black. Is that even in the ballpark?
In the histogram palette menu there are red, green and blue histograms to give the saturation of those colors, and a luminosity histogram to give the overall ( greyscale) brightness. There is also an RGB option, presumably to give a composite version of the red, green and blue saturation.
In Levels, however we have the same thing, except there is no luminosity option, only RGB. But RGB in this case cannot be a composite of the three color channels, as we use it to adjust brightness and contrast; in other words it is presumably the same as Luminosity in the histogram palette. Despite this, when I do adjustments to an image the RGB histogram in Levels looks identical to the RGB histogram in the histogram palette. I'm using PS 3 Extended.
Colorizing a photo can be fairly simple using Adjustment layers and Hue/Saturation, what I've never been able to do though, was convert black to white within a photo. The other way around, white to black, is fairly easy to pull with decent and satisfactory results. Black to white on the other hand, seems to give a lot of trouble in maintaining proper and believable luminosity. If I have a black plastic object, for example, that I'm attempting to turn white... through all random experimentation I have done the object either becomes another 'material'... ie. metallic, or the object becomes too washed out (loses detail) to even make the eye believe the change is real and the material is still the original. I do know, though, that people are capable of creating the illusion of all sorts of material and surface through photoshop. So, if someone has an idea on how to 'colorize' and image while maintaining the original and proper reflection of light on the surface of the object,
Attempting to lighten plastic center plate using levels, loses correct material luminosity and becomes metallic
Attempting to lighten plastic center plate, using Lightness/Saturation, loses vast amount of surface detail, becomes 'flat' and washed out
I'm trying to replace a colour in PE9 (Enhance > Adjust Color > Replace Color) but it's only replacing the luminosity, not the colour.
For example, I'm trying to replace a pasty white with full red (255,0,0) and it just comes out grey....
I can't find any switches for 'color/luminosity/hue' etc
New action set?
View 1 Replies View RelatedIs there a way to assign this to a shortcut key?
View 8 Replies View RelatedI'm on Win 7, 64 bit, and CS6 (released). I've got the Spot Healing brush active and I Shift + Right-click to bring up the Blending options. I cannot change to Luminosity. It will change in the drop down box on the tool bar however.
When I first noticed, it was Lighten that it wouldn't change to. I've rebooted the PC a couple of times and now it seems to be the Luminosity mode.
when trying to use luminosity selection keyboard shortcut and it dosent work . On pc i should be: ctrl alt ~ but nothing happens - no marching ants. Mine ~ key is positioned to the right on my keyboard just beside the return buttom. Could it be that im using the wrong key here or.... thanks for any surgestion. (Maybe there is another way to make the luminosity selection if it is my keyboard short cut that dosent work.)
View 5 Replies View RelatedDoes 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 Related