Photoshop :: Channels/Alpha Channels?

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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Photoshop :: Alpha Channels

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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Photoshop :: Using Alpha Channels?

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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Photoshop :: TIFF Alpha Channels

Jul 16, 2013

When importing some flat TIFF files from Photoshop CS5 into After Effects CS6, AE asks what kind of alpha channel these images have — straight or premultiplied.
 
What type of alpha channel does Photoshop use for non-layered TIFFs?

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Photoshop :: Alpha Channels Are Global, Not

May 21, 2009

Using PS CS4, I noticed that obviously every layer in the image has its own Red, Green and Blue channel. But when I add an additional channel (Alpha channel), the contents there are not stored per layer, but "globally" i.e. one alpha channel for the entire image. Is that correct, or am I doing something wrong? Note that when I add a mask instead of an alpha channel, it does work as expected (each layer can have its own mask, just like they each have their own R, G, B channels).

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Photoshop :: Copy The Alpha Channels?

Jun 8, 2006

When I copy over a pic or a part of it to a new 'picture' the alphachannels are lost.

Can you copy both the RGB color and the Alphachannels?

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Photoshop :: Alpha Channels And Layers

Mar 9, 2008

did some pixel art for my programming projects and some GIMP stuff for banners and such. Photoshop and have found myself in need of alpha masks.

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Photoshop :: PS-CS: Alpha Channels Question

Feb 28, 2004

I don't use Alpha Channels that much; well, actually, never, so I don't know how to do this: When applying an effect to an alpha channel, how do I "apply" it to the finished image? I'm using the Lens Blur Tool and when I finish running the tool, I am not seeing the result it should have applied. I know, "DUH!" but I can't figure it out.

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Photoshop :: Masks And Alpha Channels

Nov 10, 2005

I'm wanting to take and existing graphic and use the outer edge to shape another graphic. In other words, I'd like to make the first graphic a 'cookie cutter' so to speak that I can use on other graphics.

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Photoshop :: Alpha Channels/ Transparency...

Mar 14, 2003

transparency and alpha channels. I'll explain what I want to do, and hopefully someone can tell me how. I'm creating an image in a 3d modeling program. I want to export an image file (Targa, 32 bit, with Alpha Channels) into photoshop, then extract the alpha channel(that being the black background in this case) so that i'm left with the actual image of the 3d model over transparency, with which I can use to layer on top of things created in photoshop. Ok, that said, i'll explain it one more way, in hopes to make it clearer. I'm doing weather graphics for a news program, and have rendered out a cloud in a 3d modelling program(3d studio max). I want to import this image of the cloud into photoshop, and layer it over graphics I created in photoshop, minus the background created in the exporting from the 3d program.

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Photoshop :: Alpha Channels Pallette

Oct 4, 2005

how to use alpha channels but what`s the use of the channels pallatte.

why duplicate a channel?

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Photoshop :: Image Alpha Channels

Apr 29, 2008

I cannot find much on the web about it, how to use an alpha channel. However, none of them address this issue.

I use photoshop cs3 extended.

I am using png and tga image formats

When using an alpha channel, you can set the alpha to absolutely transparent. However, when you do and save the image it removes the other channel information on the rgb channels. This is problematic because I have to use a 1 transparency value to retain my rgb channels. This causes issues as I need the full alpha but also the texture information.

This is for texture work on a game and the engine uses the alpha channel for a team color overlay on top of the rgb image. So I need all 4 channels rgb for texture, and the alpha is a team color overlay.

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Photoshop :: Alpha Channels & Quark

May 19, 2006

I am still a hold out on using Quark Xpress (v6.5 for Mac OSX 10.3.9). I would like to use product photography in my layouts that include drop shadows that would have a transparency effect once placed in Quark. I suspect that this needs to be done with Alpha Channels in Photoshop, but for the life of me cannot figure this out.

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Photoshop :: Drop Shadows With Alpha Channels

Aug 25, 2005

im trying something very basic on Photoshop 7.

I'm creating a text layer, and then applying a simple drop shadow to it. but when i create an alpha channel it ignores the dropshadow and only creates the alpha for the basic text.

i know its possible using the "magic wand" but i have to apply this to over 100 different *.psd files so want to be able to easily automate it..

at present to create an alpha channel i use CTRL + the relevant text Layer, then go to CHANNELS + SAVE SELECTION AS CHANEL

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Photoshop :: Script Or Action To Delete All Alpha Channels?

Sep 25, 2013

when i work on an image , i create lots of alpha channels , is there a script/action to delete all with 1 click?
 
i run ps cs6 64bit , windows7 64 bit
 
i found a short script but it's amazing slow

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Photoshop :: Creating Pre-multiplied Alpha Channels With PNG And Other Formats

Aug 7, 2013

I'm in a process of making assets for Unity3D engine and I'm making transparent png's with alpha channels premultiplied with black. My questions:
 
To this day I've been using superPNG plugin to add alpha channel because it was really hard to find option to do it in Save As... menu. Today I've found Export -> Render Video where I can choose PNG and premultiplication. Am I doing something wrong or is it the proper Photoshop way to export png via video function? It seems really hidden!I can do the same for TIFF, PICT(i suppose no pict for me because its pure mac extension?), and tga format with one black layer and ticking Alpha Channels box, but its somehow greyed out for PNG? Why is that? 

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Photoshop Elements :: How To Save Targa With Alpha Channels In 9

Nov 10, 2012

I have PSE9 and need to create an image without the background (mk background Alpha Channel) and save as Targa. I can edit the pic, save at 32 at 200k but PSE9 does not allow to save/create Alpha Channel. How do I make the (background an) alpha channel and save as Targa?

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GIMP :: Alpha Channels In BMP File

Nov 2, 2013

Some .BMP files.

I need to save some images with transparency that are in .BMP format, but said images seem to have what's called an alpha channel, which covers all of the image's background and not the transparency that I need. I've tried to use the "Convert color to alpha" option, but it appears that that only works in the image that I want and not in the alpha channel itself (yeah, I didn´t know what alpha channel was until then).

I leave an example of one of the various .BMP files that I want converted to .PNG with transparency.

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GIMP :: Alpha Channels Vs Masks

Sep 27, 2012

Is there anything that can be done using an alpha channel, that can'tbe done using masks and layers, or vice versa? Context of question: I've worked extensively with masks and layers.I've never worked with alpha channels.For example:

Using an alpha channel:

1. Open two single layer images, A and B, neither one of which has analpha channel.
2. Drag the image B over to A and close B.3. Now image A has two layers, A and B. Put layer A on top, selectlayer A, set the blend mode to Normal, and add an alpha channel.4. Erase part of layer A, where-ever you want layer B to show through.At this point, layer A has an alpha channel with white where you wantlayer A to show, and black where you want layer B to show, but it doesnot have a mask.

OR

Using a layer mask:

1. Open two single layer images, A and B, neither one of which has analpha channel.
2. Drag image B over to A and close B.3. Now image A has two layers, A and B. Put layer A on top, selectlayer A, and set the blend mode to Normal (don't add an alphachannel).
4. Create a solid white mask for layer A. Paint black on the maskwhere you want layer B to show through.At this point, layer A has a mask with white where you want layer A toshow, and black where you want layer B to show., but it does not havean alpha channel.

In both cases, using a mask or using an alpha channel, the net resultis the same.So again, is there anything that can be done using an alpha channel,that can't be done using masks and layers, or vice versa?

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GIMP :: Alpha Channels And Exporting Transparency

Nov 25, 2012

Basically, I am trying to use an alpha layer/channel to export a picture that is transparent except for a grass clump that is colored green over the alpha layer. So the picture looks like a solid green rectangle, but is actually a green blade of grass.

Problem is, I cannot get the alpha layer to work. I can't follow the tutorial as it is in photoshop, and random videos on-line haven't worked.

(Here is the tutorial: [URL]...... from 08:40 - 09:30)

(I have also attached my practice file as a TGA)

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AutoDesk Smoke :: Can Publish Export Clips With Alpha Channels

Nov 24, 2013

I haven't tested every single combination yet in the publish menus.  To save me trying them all, is there any option that works to publish all the shots in a sequence together with alpha channel?
 
I have a sequence of CFXa clips with matte output connected in CFX, I duplicate the sequence and commit cfx... every clip has a matte container.  So far, so good.  Now I want to output the whole sequence as individual shots with alpha.
 
Tried the EDL option, changing file type to OpenEXR... no alpha.  Tried EDL, changing output type to movie and then selecting ProRes 4444.  Alpha was solid black.
 
Is it possible to get publish to create individual movie files for each shot at all?  Everytime I try this it writes one continuous quicktime file even though I select a shot number token.  Writing individual shots seems only to work with image sequences, is that the case?

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Photoshop :: Saving Tagra Files With Alpha Channels In Photoshop 7

Mar 8, 2004

when I try to save a tagra file with a alpha channel in photoshop 7 the box for the alpha channel is greyed out, with an warning sign next to it, and the line below stating "file must be saved as a copy with this selection" When I examine the saved file the alpha channel is not there!

Has anybody got any idea why?

My old version of photoshop 6, allows you to save alpha channels!

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AutoDesk Smoke :: Importing And Using Alpha Channels In Autodesk

Oct 2, 2012

I am experimenting with Smoke 2013 pre-trial and I am having issues with importing images and video with alpha channels.

1. If I have a layered Photoshop file or png with an alpha channel (a still frame lower third), I see that I can import it as a multi layered clip, but what is the best way to have it in the sequence to show up properly?

2. If I have a QuickTime in animation format or Pro Res4444 format with an embedded alpha, how can I import that file to show and cut it on a top layer to animate above my video?

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Photoshop :: Alpha Channels In Photoshop CS4 Not...

Jul 16, 2009

I'm not an expert at using alpha channels, but I was trying to clip someone from a background. I followed the directions according to a tutorial I found (choose which color channel looks best, then Alt-click on New Channel). My alpha channel always looks black. Anyone else have this problem?

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Photoshop :: Channels

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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Photoshop :: Channels

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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Photoshop :: Channels

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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Photoshop :: Channels?

Apr 29, 2007

I have a question about channels.

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Photoshop :: RGB Channels

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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Photoshop :: Channels

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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Photoshop :: Can Replace One Of The RGB Channels

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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