Photoshop :: I Want Grayscale, But I Still Need My RGB Channels
Jun 10, 2007
I need to convert an image to Grayscale in CS2, but I need to retain my RGB channels. I need them because a special bump map tool that I have, which also converts images to DDS format, requires them. And I need to make my bumpmaps with this tool because of the special format that dds files require for the game I am using these textures in.
I've been using the Photocopy filter, but I feel it leaves the image a bit "dirty." I'd like a clean Grayscale conversion.
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May 12, 2008
I have a set of grayscale images that I want to combine such that each image becomes a color channel...
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Sep 8, 2013
Why are the image thumbnails in the channels pallet not showing up as grayscale images? They used to, and for some reason or another aren't any more for me. Instead, they are showing up red, green, and blue for each respective channel. I'm on Mac, using CS6.
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Nov 11, 2012
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...
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Nov 8, 2012
How do I quickly separate an image's channels into grayscale layers? I'll need to do this frequently, so is there an automated way? If there isn't, can it be done with python scripting? Would it take me a long time to learn how to write such a script assuming I know a bit of Python (as used in Blender), but haven't done any scripting with GIMP?
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Jun 29, 2006
What 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.
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May 8, 2006
I am trying to edit this picture, and i find my desired results by manipulating the channels (removing the blue and leaving the green and red so it looks as if the whole thing has been tinted yellow), but when I save it as a JPEG, the yellow is gone, leaving all RGB. How can I keep it with my yellow?
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Mar 27, 2003
I guess sometimes teaching newbies like me is annoying. I could take the easy way ripping like most of the people does, but i do really want to learn, and i have a question, so if someone thinks tht spending his time teaching a fool newbie is something worth, thr it goes...
I know when we have an image even it is using "RGB" or "CMYK" collor mode, it is divided in channels, red, green, blue and so... this i can understand quite clear, but wht exactly is an alpha channel??? wht collor it represents??? Wht is it for??? Is there an article tht i could read about it??? I can manage it well, but i'd like to know it's concepts..
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Jul 20, 2004
I have been using the Total Training series, and am ALMOST complete (Just gotta go over the Typeface tool area and go over the Bonus disc material)
One area that Deke (the host of the series) didn't get into much was Channels. Hopefully I would like to state how I see them, and if I am incorrect in any way (or if you have useful information about channels), you could pipe in and let me know! Thanks.
Ok, so channels are dependant on the Color Mode you are in, right? If you are in RGB, then you'll have 4 channels. Red, Green, Blue, and the channel which controls them all, called RGB. In CMYK color mode, you'll have 5. Cyan, Magenta, Yellow, Black, and the control channel 'CMYK'.
Each channel, aside from the control channels, are a Grayscale mapping of that color's (WHAT?) in an image? It's Lightness? Saturation? I know it couldn't be Hue, because that's determined by the collective color from each channel put together.
Also, what is the point in ADDING channels? I thought that it would be nice if you could add a channel which affected the layer via some kind of adjustment, but that is merely the adjustment layer feature (with mask used in order to define intensity of the effect on that layer) So what is the point in adding channels?
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Apr 29, 2007
I have a question about channels.
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Jun 21, 2008
Masking using Channels and tried on one of my images.
When i select "Channels" option, i am getting a image which looks like looking through a RED, BLUE and GREEN filter. It is not showing the images in various greyscale modes as shown in the tutorials. There is a red or blue or green color cast on the image.
Is there any setting i need to select when using these options?
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Oct 30, 2004
Many times when I am doing something in Channels the black and white image(s) look better than if I converted the RGB image to grey scale. I have been experimenting with no luck. Is there a way for me to select one of the red, green or blue images and make it a final image that I can alter and save in PS?
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Sep 9, 2013
i have a picture where the Blue channel is totaly black and noise, so i to know if is possible delete this and create a copy a of the green or red channel and apply this as blue channel ?
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May 14, 2013
I am trying to convert an image that I took in SlideBook using fluorescent dyes to label proteins on a cell. The original image has two channels (red and green) with different intensities for each which correspond with the amount of each respective protein present. The problem is when I open the image in PS and convert it to RGB mode, all three of the channels have the same intensities so I get a black image. If i vary the contrast I can see the image but it is in black and white and the intensities of each channel are the same so I am unable to separate the two colors. I need to be able to see both channels (red and green) with their original intensities but I cannot figure out how!
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Feb 17, 2013
Using CS5 - up until yesterday was able to select RGB in Channels panel separately.
Today when I go into channels I can select Blue, Green or Red separately, but when I go to select RGB on it's own, it won't - it highlights that and the three seperate channels. I can turn the 'eye' icon on and off all of the others but not RGB.
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Nov 4, 2013
In my Camera Raw 6.7, when using the Tone Curve, the RGB channels are grayed out and can not be switched on, probably because the Raw Defaults are missing.
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Jan 10, 2013
I have about 7 channels that need merging together so I can save the file as a JPEG
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Apr 17, 2007
Why is it that in an RGB colored red rose, the red channel is very light in color and the blue and green channels are very dark (near black), even though there is relatively little blue are green in the colored (RGB composite) version of the vibrantly colored red rose? This seems to be counter intuitive. When I look into the red channel, I would expect to see dark density to reflect the dominance of the red channel and lightness in the blue and green channels to reflect their relative absence in a red rose.
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Nov 5, 2004
I have my alpha channel and my blue channel selected. I LOVE THIS IMAGE. how do I get that image over to my layers?
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Dec 23, 2002
In some tutorials they make selections and store them into a channel. In others they use the pen tool and store the selection as a path.
Are these two ways or doing the same thing or they have different uses?
What are the pros and cons of each one?
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Sep 20, 2002
blending 3D pictures(w/ black blackground) into another 2D picture with alpha channels in that 3D picture. Everytime I try to copy and paste under LOAD Selection, i get the 3D picture stuck with the black background or totally white with no picture when paste onto the 2D picture. I want to paste the 3D picture(minus the black background) to blend into 2D picture.
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Apr 17, 2009
I have a logo that I like, but I can't figure out how to change the colors of it. I tried to go to the channels where I saw RGB, Red, Green, and Blue channels. Is it possible to change these channels, thereby changing the colors?
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Dec 19, 2006
I have a picture I'd like to Extract. So far I have lightened it and cropped it. I have also had a look at Russell Browns QT tutorial, but I don't quite understand about channels. As far as I can see, I would benefit from using the Red Channel perhaps, but I would like your opinion on it.
Also, while I do Extract it, I'd like the image as large as possible, but once I click "Extract", the picture becomes much smaller. If I keep it as big as it is now, it will be OK, but probably not if I resize it.
At the moment, the picture is quite big, and I don't know how to get it down in size (kb) and still keep it physically big enough for you to view it. I know I can save for web, but even then, it won't go down to 75KB. What Width etc. should I set it to?
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Jul 15, 2005
alpha channels, and how to use them?
how can i apply the alpha channel to the original to get all the green stains out?
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Nov 15, 2002
Been messing around with using gaussian in the channels and then applying the texture to something, but this grainy texture keeps sneaking in.
Anyone know how to get rid of the "bumps" in the middle? I made a square, blurred it, messed with the levels a bit, then I contracted the selection to darken the center. Just in case that information might help .
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Oct 9, 2004
I was playing around with lighting images today by first creating an alpha channel, blurring it and then applying the lighting effects filter to it. For some reason after applying the filter I get jagged edges everywhere. When working with the channel, i did invert the selection and then clear it...
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Jan 10, 2005
I am unable to use the Search in Photoshop Help. This has not been a problem in the past. I did however recently load SP2 but really don't remember if this feature worked following that download.
Also, while doing a tutorial one of the steps indicated that the channel visiblity should be turned on and used. When I went to the channels palette this was not available. I have Photoshop 6 and it's quite possible that this feature came later. Is there anyway of changing the visiblity of an individual channel.
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Sep 11, 2013
please try this:
1) new image, grayscale
2) fill (say 96,96,96)
3) image->mode->rgb color
The pixels will be (95,95,95) and (96,96,96) when they should *all* be the same.
It also happens when you paste a black & white image into an RGB document because even though it has three 8-bit channels (by definition not grayscale) Photoshop decides to make it grayscale.
Is there a way to correct this ?
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Jul 11, 2008
Desatuate? Grayscale Mode? Channel Mixer? Black & White Command?
How do you create your most beautiful grayscale photographs?
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Jan 20, 2006
I know one way to turn a photo to black and white, grayscale,
but how do I paint colors on to it?
Is there another way to make a color pic B&W so I can put my own color into it?
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Jul 11, 2008
I got Adobe CS3 Master Collection. Everything is fine, but there is one problem: In Photoshop grayscale images look brown or sepia. The screen itself is neutral, no color tints and I installed the driver. This problem only appears in Photoshop, Illustrator and not in other programs like Flash, Dreamweaver, Fireworks, Corel and ACDsee. In those programs grayscale pics look neutral. It has no effect when I disable the color management in Photoshop. RGB pics look great. When in desaturate RGB pics they look neutral grey but as soon as I convert them in grayscale, they become brown. In Photoshop's color managemet I can select a profil for RGB colors as you can see in the screenshot, but for grayscale I couldn't find a profil. Even in the internet I couldn't find one for my monitor.
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