While the select color range tool in Photoshop may be useful for some things, it’s not at all the same thing as Gimp’s color to alpha. It’s much like using transfer modes such as multiply, screen, or overlay, as opposed to using the magic wand tool to select white, black, or gray.
There is a plugin for Photoshop that can do this, but it’s a little ancient and only 32bit. It is, however, free and may do the trick for you.7I believe you can use the Select -> Color Range tool to achieve this affect. The color range selection tool is a pretty handy feature that lets you click a color from a gray-scaled version of your image, then use a “fuzziness” slider to adjust the range. You can also preview the selection in the full image. This creates a normal photoshop mask when you choose OK. Once you have your baseline selection, you can then further adjust the mask using all of the normal masking tools in Photoshop. This is probably the most ideal way to do what you need to do (based on your previous question, your trying to isolate a bottle?) The Color Range selection will give you an almost-ideal mask with transparency in tactand you can further adjust that to fix areas that were selected that should not have been, or that were excluded and should have been selected. Once you have fine-tuned your mask, simply hit Delete , and watch the magic occur. Since the mask was a full alpha mask, the deletion will remove varying degrees of “opacity” based on how heavily an area matched the base color you selected initially. Since your background is white, selecting the white color and adjusting fuzziness to appropriately “fill in” the parts of white that show through your bottles should give you a pretty effective mask in about 30 seconds flat. A little adjusting might take a couple minutes, but the end result should be better than the Gimp “Color to Alpha” plugin (at least, based on the few examples I’ve seenit seems to be a bit over-zealous in its application of transparency.) Generally speaking, a “full green” or “full blue” background might be better for this kind of thing. White is a blend of all colors, and that can make it more difficult to isolate specific objects from an “all-color” background. Thats usually why a lot of special effects sequences shot for movies are filmed against a green backgropits easier to filter out during post-process compositing (its a single “primary” color in the RGB model, rather than a blend of all three colors. This is called Chroma Key filtering.) It should be noted that you want to use a chroma key that is complementary to the color(s) of the object being shot. For example, if you are shooting a green bottle, it might actually be best to use a red background, as using a green background would make it very difficult to exclude a green background without losing the bottle along with it. If you have yellow, orange, red or brown bottles, a blue background may be best. The general idea, though, is to use a background that is complementary (think opposite color on the color wheel) to the foreground objects being shot.5I have not used the Color to Alpha feature in GIMP, but it looks similar to converting a channel to alpha. In the channels panel, control click (or command click if you are on a Mac) on the channel you want to convert. Then you can either create a mask from the selection or press delete. If you want more control you can edit the mask using curves, levels, etc. Just create the mask as I mentioned above and select it in the channels panel and apply whatever adjustments you want. The Color Range tool as suggested by jrista will also work, but I find the channels method a little easier to control.4Few years late, but I think what you’re looking for is called Color Range Masking.
Look it up or follow roughly these steps:
1. Create a mask for the layer containing that colour you want to get transparent and make sure the mask is selected.
2. Look up the Masks or Properties (since CS6) window (Window > Masks/Properties).
3. There you’ll find a button called “Color range”
4. In the new window you can sample the colour you want to mask, or even add multiple colours using the button with the sampler and the plus sign.
I’d suggest setting the Selection Preview to Grayscale.
Just play around with it. 🙂1In my personal experience, “Select Color Range” does a rather hard selection. You can compliment this, however, with the “Refine Edge” tool after performing the initial selection. Choose your view as “Overlay”, select “Smart Radius”, and adjust the radius until the overlay covers all of the color you would like to remove. Choose to Output to Selection, click OK, then delete the selection. That should remove all of the bits that a simple “Select Color Range” leaves behind.0Colour to Transparency Photoshop Open image F7 to bring up layers pane if layer is locked, double-click where it says Background Duplicate layer Delete layer with padlock Now use magic wand and click on color area you wish to remove and delete GIMP open image go to layer/transparency add alpha channel tools /selection tools/ fuzzy select / delete or u /delete
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PHOTOSHOP: Color to Transparent. Color to Alpha, just like GIMP. But with the ability to apply it to a group. So any layer in that group that happens to have a specified color in it would be “knocked out” to transparent. Would be beneficial for easily knockout out (making transparent) various …
Related Questions More Answers Below. GIMPs color-to-alpha functionality is pretty unique to GIMP. It’s possible to get something similar, but not quite identical in Photoshop. You could use the magic eraser in Photoshop to erase one colour to transparency, but that will leave the other colours solid, unlike GIMP’s color-to-alpha function,
Nov 10, 2009 · hi, i was wondering to perform a color-to-alpha action on a picture, in photoshop. with a color-to-alpha action, i mean that you “divide” a color away, which ISNT the same as using the select-colorrange action, which doesnt give the same effect
May 13, 2012 · How to change background color of alpha channel in Photoshop. White background will NOT require you to invert you selection when Loading Selection.
Author: Rick Rys
Converting grayscale shades into alpha channel. I have a gray-scale image. I need to convert gray-scale tones to transparency data in alpha channel using Adobe Photoshop. Say if the area is black, then no transparency. The white areas will be converted to full transparent pixels in alpha channel.
Create a totally black layer (raster or vector). Then
Layer > Add Layer Mask.
Will add a totally white mask to your layer. This will be the alpha channel. When you watch channels (by clicking the Channels tab next to Layers) you will see this alpha channel as.
Layer 0 Mask.Best answer · 0Ok, this is very easy.
Go to the CHANNELS tab.
You should see “Gray” next to the thumbnail of the image you want (if you don’t see “Gray”, then your image is not grayscale).
Ctrlclick (or ⌘click, if you’re on a Mac) on the thumbnail image next to “Gray”. This will select all the white areas of the image.0the program GIMP (its free to use and download and similar to photoshop) has a very simple way of doing exactly what you are asking for without a lot of picking and masking.0In Paint.NET.
Download and install “BoltBait’s Plugin Pack” from here.
Effects menu -> Object -> Switch Gray to Alpha
When asked, “Switch gray to alpha by deleting”, select white.0
If you want to load a selection from a color and use that as a mask (hiding those parts of the layer – making it transparent) try Select > Color Range to select the color (s) in question, and then add a Layer Mask. The selection will automatically be used for the mask (you might need to invert it).
Top responsesI’ve never heard of such a thing. Could you describe what it is supposed to do? What are you attempting (and why)?1 voteIts meant to take a solid color and make it transparent, which could allow a second image to show in its place. And im trying to use it to a portrait with a … read more5 votesThat’s not a screenshot from Photoshop. It looks like Gimp? If you want to load a selection from a color and use that as a mask (hiding those parts of the … read more4 votesyou are actually completely right. I’ve been using the wrong program the entire time, no wonder ive been here for hours ;( and thanks for the tip mate! i … read more1 voteSee all
How masks are associated with alpha channels in Photoshop. You can add a mask to a layer and use the mask to hide portions of the layer and reveal the layers below. By default, the layer mask is linked to the layer that it is attached to. To save a selection more permanently, you can store it as an alpha channel.
Photoshop: Replace Color With Transparency [closed] Ask Question 15. 1. Use Gimp’s Color to Alpha feature. Amazingly there is no Photoshop equivalent, but it work’s so well in Gimp and for results that good it is no sweat to switch between the two programs occasionally! Change color of object in Photoshop CS-3. labeling and saving
Create and edit alpha channel masks. You can create a new alpha channel and then use painting tools, editing tools, and filters to create a mask from the alpha channel. You can also save an existing selection in a Photoshop image as an alpha channel that appears in the Channels panel. See Save and load selections.
Mar 14, 2017 · Re: Photoshop – How to set the background color to transparent? ayoosh May 4, 2016 5:33 AM ( in response to JGreg7 ) To make background transparent, I go to quick selection tool -> select the item -> inverse -> smooth -> refine edge -> tick smart radius -> radius 3px -> smooth 4px -> tick decontaminate color -> output to (new layer with layer
This page demonstrates one way to create a gradient which fades an image to transparency using Adobe Photoshop. This technique can be used to fade an image into the background colour …
How to convert solid color to transparency? Ask Question 5. I have a simple black and white image. Using raster software (Photoshop, Pixelmator, The GIMP): Choose “Layer – Transparency – Color to Alpha” to select any colour (defaults to white) you wish to make transparent.
Photoshop® contains powerful Alpha Channel manipulation features. We’ll see here one of the simplest way to proceed: Extrude a part of the image and remove the existing background. Advanced techniques also exist to work with alpha channel. See Photoshop help to read more. Create a Transparent Image using Adobe Photoshop® 1.