Photoshop :: Can You Edit The Transparency Channel
Jan 24, 2009
how to edit the transparency channel in Photoshop but I can't find anything.
In photoshop the transparency channel is completely hidden from the user. Why is the transparency channel hidden in the first place? Even in GIMP, it is shown as Alpha 1 and can be edited. Is there any way to unhide this channel so it can be edited?
If there is no way to edit it directly then it is pretty simple to recreate the transparency channel info in a layer or channel. Simply control clicking on the layer selects the transparency info. You can the fill the selection with white over a black. It can then be edited. But is there any way to upload the edited info directly into the hidden transparency channel?
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Jan 2, 2014
Just made sure updates for the video card and all the hardware were current and still getting this problem where when I go to adjust a channel of video a random frame from the below channel will insert itself into the clip that I just moved as if it was married into the source footage.
Adobe Premiere Pro
Running an nVidia 660 with 331 drivers installed
Win7 64 bit ultimate
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Feb 16, 2004
I'm developing a tile based game, I have basic ground tiles, and above these tiles can be objects. My game engine supports objects with an alpha channel, where the alpha channel is used for transparency:
alphachannel 0 = completely invisible pixel
alphachannel 255 = opaque pixel
alphachannel between 0 and 255 means the object and the background tile below that are blended, like semi-transparency.
This is useful to give the objects soft edges, and for semi-transparant fire, ghosts, and other nice looking effects. Code:
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Aug 14, 2005
I'm trying to do something that I could previously do with other image software. I want to 'paint' the transparency of a layer using the alpha channel. So when I paint black on the alpha channel it makes that part of the layer completely transparent, and white makes it completely opaque (and grey shades are in between). From what I understood of the help, this should be possible by just creating an alpha channel and painting in it. But when I try and then click back to display the RGB channel to look at the changes I've made, nothing actually changes. Whatever I seem to do to the alpha channel it doesn't actually affect the layer's transpancy at all.
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Jul 2, 2012
For example: when you use a brush set to 40% opacity on a new layer or when you apply a mask to a layer you get semi transparent pixels. However PS doesn't show a channel that represents that transparency but I know it has to do this somehow internally. That layer isn't just RGB: it's RGB plus something that stores the transparency.Is there any way to make this transparency channel visible/editable?
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Dec 6, 2011
png texture with alpha channel but the transparency seems to be white.
How do I let the transparency in the png texture look through to the background?(alpha blend)
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Dec 12, 2012
I have removed the background from a photo using selection deleting to transparency via alpha channel. My dog was left. I then exported to png. When I try to upload the dog to use in a label, (Open Office), the back ground turns to white.
What am I doing wrong?
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Oct 21, 2012
Is there any way I can directly make a grayscale image into an alpha transparency channel?
I mean, NOT involving selection? Because selection by color to layer mask,is really difficult what I need to do the selection threshold.
Why is it easy to turn an alpha channel into a grayscale image but not the reverse?
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Dec 15, 2011
I already have an image file in png format..which I want to use as an application launcher icon for my android application.
The android specifies image with following properties for the launcher icon(Will need 4 different image to support different screen size in mobile devices)
Launcher icons should be 32-bit PNGs with an alpha channel for transparency. The finished launcher icon dimensions corresponding to a given generalized
Screen density are shown in the table below.
1. 36 * 36 px
2. 48 * 48 px
3. 72 * 72 px
4. 96 * 96 px
I would like to create 4 png files(with specifications mentioned above) from the already existing image file. How do I do that in GIMP.
I am completely novice to image editing(Never touched any image editing software before) and not sure how to achieve this in GIMP.
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Jun 18, 2013
Do I need to convert the original hi-res image file somehow to be able to save for web?
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Mar 20, 2013
I have a series of files in which I improperly modified the selection set prior to saving the selection, and now around the intended viewable area there is a hazy artifact that seems to correspond to where I manually edited the selection using Quick Mask (prior to saving).
In other words, within the area of the alpha channel that should be invisible, there is actually a visible, unwanted grey-ish artifact, and I think it's related to how I was using the brush to edit the selection in Quick Mask before saving.
Now I am unable to edit the alpha channel, although Adobe's own website says that in order to edit an alpha channel, all I need to do is select the alpha channel (which I am doing) and then paint at 100% black or white with a brush to either include or exclude parts of selection set.
When I choose the brush and start painting at 100% black or white, nothing happens and I can't figure out what is happening.
The exact steps that I'm taking are below:
1) click on alpha channel (visible and ready for editing), all other channels only visible not active.
2) selecting the brush at either 100% black or white
3) attempting to paint to alter the alpha channel (I've tried painting on the actual alpha channel in Channels, and I've tried painting on the alpha channel as it appears in Layers, and neither works for me).
CLARIFICATION:
I actually am able to "edit" the alpha channel HOWEVER I cannot remove the hazy artifact. I can use 100% black or white to remove the pink/light red areas on either the actual alpha channel (in the Channels area) or as it appears in Layers, but I cannot remove the areas that are grey-ish (well I can paint them white but I can't paint them black, i.e. fully pink).
A teacher showed me a quick fix process that basically involves activating the alpha channel, inverting the selection, and then deleting everything outside of the alpha channel, and then resaving the file. That worked at one point, but now that quick fix is not working either (I am just ending up with a completely visible, white space around the intended visible area, rather than an invsible area).
EDIT (07:22 3.20.13) Also, if you look at what Photoshop is registering as the actual alpha channle, it doesn't match with what I'm seeing above, that is the black and white alpha channel appears to be as expected, and there is not the weird distortion that I'm seeing above in the pink/grey image.
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Mar 20, 2013
I thought that I could just use Quick Mask to manually paint with 100% black or 100% white to adjust the boundaries of the selection and then save that final selection as my alpha channel.
However, I'm discovering that when I do this, I end up getting a weird grey-ish artificat (which incidentally, I can't figure out how to remove it). How I should be properly modifying the selection prior to actually saving it.
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Nov 9, 2011
I'm trying to create an image which emulates a solar corona (it's basically just a blurry circle). It's as easy as making one brush stroke in gimp, but my problem is that i can't get all the channels to be correctly set.
Ultimately i just want to edit the alpha channel, NOT the RGB ones. They should all be pure white, or 255, 255, 255. But for some reason, no matter how much masking or color selection or clicking only the alpha channel and not the RGB ones or anything that i do, i cannot keep the RGB white while editing the alpha channel, every stroke that affects alpha seems to invariably affect the other three.
How can i edit ONLY the alpha channel?
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Jul 26, 2013
I am a screen printer and I print my separations from Photoshop. I routinely work with multi channel files or RGB files with additional spot color channels. I have created actions to place my registration marks, re-size images, etc to get ready to print but I manually have to create the text labels for each screen if they are missing from the original artwork.
The files I work with have channels named as "Base White, Red, Green, 284 Blue" etc indicating the ink color. What i would like to be able to do is click an action that would copy the text from the channel name and insert it into a separate or each/all channels near the top of the file so that when I print each positive it has a corresponding label for ink color.
I am not sure if this is even possible, and I am limited on my knowledge when it comes to actions and have pretty much got lucky in the past getting them to do what I want without unnecessary steps.
On my registration target action it creates a new channel with each individual reg mark then combines them into one separate channel in which I just copy the contents and select all the ink channels and fill with black to make them appear, i'm happy with the steps it takes as it isn't too much trouble and if this could do the same with labels I would be happy with that.
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Aug 24, 2011
Is there a way to edit the transparency of a dimensioned object? I have many complex objects and sub-objects with transparency fills and all individual parts dynamically dimensioned. I find I cannot edit the transparency of any part that has a dimension. Surely there must be a way to do this...?
My dimensions are color-matched to the fill parts, and the text dimensions and dimension lines are different sizes and weights making it very time-consuming to delete, edit transparency, and then recreate the dimension with all the desired properties.
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Sep 23, 2011
Basically just want to make the middle separating line in the following image:
Identical to (same degree of horizontal fadeout into transparency):
I have spent hours on it trying to edit the original layer below the alpha transparency or adding layers, getting nowhere.
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Jan 3, 2013
we just upgraded to acad 13 at the office and now when i pick single line text to edit it the transperancy of the shading is so dark i cannot see the text line to place my cursor where i need it to be to change say.. one letter or whatever.
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Sep 26, 2012
How can I get the channel subassembly to attach to the assembly insertion point at the channel flowline marker? I need the flowline to follow my profile elevations.
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Sep 3, 2013
I am trying to access the edit original (edit with) option to edit a photo that has not been edited yet. I right click and go through the edit menu and does not appear or is not available? Would I have to reopen it manual in photoshop or is there a way around this to access that setting? it sometimes does not appear on my already edited photos.
I would prefer not to open each photo again, as some files i do not have and were imported into the document with another computer.
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Sep 10, 2006
I have two pictures.
I would like the two pictures to blend in the middle from left to right.
The picture on the left will be sharpe on the left side but fade/transparent by the time it reaches the middle.
The picture on the right will be sharpe on the right side but fade/transparent in the middle.
I would think I need a gradient transparency (you always have to use a color)
I see pictures like this all the time, but can not seem to find the correct feature or combinations of features.
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Feb 27, 2012
I am just starting out with the Photoshop CS5 trial. I am trying to apply a triangular pattern to a thin rectangular shape. I used the custom shape tool>triangle, then defined the pattern successfully.However, when I apply the pattern it partially repeats it along the vertical as well as the horizontal axis. Please see attached screenshot:
I only want it to repeat horizontally, what am I doing wrong?
Also, I am Fireworks CS5 user and am really missing the properties inspector panel which allows you to quickly and esily edit sizes of objects, is there a Photoshop equivalent of this?........at the moment the only way I can find to edit objects is through Edit>Free Transform.
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Oct 31, 2012
How can I add "Edit with Photoshop CS5" to the Edit With options?
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Feb 15, 2009
Can a channel (Alpha...) be converted to a layer in the same
document?
I would like to manipulate a channel from Calculations with
Photoshop tools (filters etc.)
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Sep 18, 2012
What is the more usual image mode? I think my files have been 8 bits per channel for many years. I was having a lot of trouble with Photoshop slowing down dramatically on several large files I created, and I noticed I had made them in 16 bit mode. Would this require more RAM?
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Apr 28, 2004
we are making a soft in Visual C++ .NET,and my job like a desinger is to create some pictures which contain Alpha Channel.Thise pictures will be links,but when gues take thise pictures to make its links in Visual C++ .NET the Alpha Cannel what I made disappeared.
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Apr 16, 2005
I clicked on the load select for part of image and I cut it and put it in the channel and plus pasted in the layer palette. I see the image in the layer pallette now and see the it in the channel as well. Is it correct?
I've another damaged picture and looked at the channel saw the red is better so clicked all from selection and copied it and scrolled down and pasted into in the green channel. Is it correct?
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Jan 21, 2009
I have just installed.
Photoshop CS4 Extended as part of the master suite.
I have also CS3 on the same PC.
Now the channel mixer doesn't show the sliders for tint (hue and saturation); the same happens on the B & W adjustment window.
I try to run CS3 (shortcuts or the program itself), CS4 comes up instead.
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Feb 12, 2004
What's alpha channel & how to use it?
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Apr 30, 2004
what is an alpha channel and how do i access it?
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May 11, 2006
I've been colouring an image which was black and white, consiting mainly of black lines. I've made a special channel for the lines and coloured it all in the RGBs chanel, and now when I want to save this as an jpg or at all, the lines vanish. The chanel and the original pic is still there but the lines just won't apply to the rest of the art so they coul be seen, only when I click on the visible or not button at the channel. I've tried to merge it but it still only gives me the colours of the pic without the lines..
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Jul 28, 2006
I have created two masks with channels to use on an image. Now I want to combine the two channel masks into one to use. I made a new layer in channels of the composite masks which gave me an Alpha channel. The Alpha channels show the solid black paint lines where I filled in the selection voids. These solid lines affected the adjustment layers so I ended up doing some erasing at 50%. Not the shortest workflow direction. How can I combine two channel masks (selections) into a common selection and save as a new Channel?
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