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How To Create Alpha In Photoshop?

How To Create Alpha In Photoshop
How to save a selection as an alpha channel? – Once you have made a selection in Photoshop, you can save it as an alpha channel by navigating to the Channels panel, usually next to the Layers panel. Click on the Save selection as channel button at the bottom of the panel to create a new channel named Alpha 1 which will display your selection as a grayscale image.

Where is alpha in Photoshop?

Alpha Channels — KnowledgeWorks Global Ltd. The alpha channel (also called alpha planes) is a color component that represents the degree of transparency (or opacity) of a color (i.e., the red, green and blue channels). It is used to determine how a pixel is rendered when blended with another.

  • Why are alpha channels problematic? Alpha channels allow images to use transparencies which may be rendered incorrectly by post-processing or cause processing errors.
  • How are they introduced? Applications such as Photoshop may introduce alpha channels automatically when 1 or more layers are not flattened prior to saving.

Alpha channels should be removed before submitting your artwork. To accomplish this use Adobe Photoshop 4.0 or higher (recommended):

Under the Photoshop “Window” pull down; select Channels if not already visible. The alpha channel(s) and the image channel will display. Click on the Alpha Channel(s) to select it. To remove the alpha channel either select the arrow in the upper right hand and scroll to “Delete Channel.” Or you can click, hold and drag the alpha channel(s) to the small trash can icon in the lower right hand corner. Both of these methods result in removing the alpha channel. Save the image after removal.

See screen captures below for reference. : Alpha Channels — KnowledgeWorks Global Ltd.

How do I save as alpha in Photoshop?

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Join The Newsletter 0 You can save an active selection by going to the Select menu and choosing Save Selection, This will save your selection as an alpha channel. Alpha Channels can be saved in several file formats, such as,PSD and TIFF. However, they cannot be saved within a,jpg file.

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How do you add alpha transparency?

The Second-Fastest Option – The other one-step method to adding an alpha channel in GIMP uses the Layer menu to achieve the same result, but it takes a whopping 1.75 seconds longer (estimated, lol). Step One: Open the Layer menu, select the Transparency submenu, and click Add Alpha Channel, And you’re already done! Those are the two fastest ways to add an alpha channel in GIMP, and you can choose which one works best for your workflow. With an alpha channel added, you can erase directly to transparency or create a transparent-edged PNG image that’s perfect for use in web design.

What is an alpha file Photoshop?

When speaking about channels in Photoshop it is basically the color components that make up the images you see on the screen. The standard channels on every image make up the RGB color profile of the image. Yet you can create a new channel called an alpha channel, to make certain tasks easier.

So what are alpha channels and how do you use them? An alpha channel in Photoshop is created as an additional channel alongside the RGB color channels and allows you to save the transparency settings of an image or selection. Alpha channels are used to save selections for later use or to share selection information between editing programs.

Learning how to work with alpha channels can improve your workflow by simplifying the selection process. Selections allow you to isolate certain elements of your image or change the opacity on specific areas. Creating an alpha channel is a way of saving your selections to use later if needed.

How do I change a color to alpha in Photoshop?

Knowing how to make any color transparent is a useful skill to have when using Photoshop. Often in projects, the design or edit requires elements from an image to be added to other designs with transparent attributes. Luckily with the help of selection tools like the Magic Wand tool and the Select Color feature, turning color into transparency is pretty straightforward. To make a color transparent in Photoshop, go to Select > Color Range. Click on the color you want to remove, then hold Shift to add additional colors to the selection. Adjust the Fuzziness slider until your subject is white then click OK. Lastly, press Delete to make the selected colors transparent.

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How do I save a PNG as an alpha?

All Axialis Software products support images with Alpha Channel transparency. PNG, BMP and PSD file format actually support alpha channel. If you want to create a nice icon (using Axialis IconWorkshop ) or a screensaver with smooth sprites (using Axialis Professional Screen Saver Producer ) we recommend you to use images with Alpha channel.

Alpha channels are masks through which you can display images. The alpha channel is an 8-bit channel, which means it has 256 levels of gray from 0 (black) to 255 (white). White acts as the visible area; black acts as the transparent area (you see the background behind the image when displayed). The level of gray in between determines the level of visibility.

For example, 50 percent gray allows for 50 percent visibility. Alpha channels are usually used with 16.8M color RGB images. The resulting image is called RGBA (RGB+A, A means alpha channel). In the illustration below you see how the alpha channel is applied to the original image to remove (visually) the orange gradient background. We’ll learn how to create a transparent image with Alpha Channel from a standard image. 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.
  • Open your image in Photoshop,
  • Select File/Open.
  • Choose your file and click Open,
  • The file open in a separate document window.
  • You can download the original image we use in this tutorial here: logo.bmp (right-click and choose Save Target As ).2.

If the file is not in RGB format (16.8 M colors), convert it: Choose Image/Mode/RGB Color,3. Now select the background area of the image (the area you wish to remove). If the image background has a solid color (white in our example), select the Magic Wand Tool (W) or click in the toolbox. Be sure to specify Tolerance=10, Anti-aliased and Contiguous in the selection options (dialog box on top, under the menu). You may need to adjust the tolerance value (it depends on your image). When done, click in the background area of the image 1 : 4. A selection dashed-line appears around the logo and around the square border of the image. It means that the background is selected (not the logo). If the background is not made of a solid color, you can select it by using the Polygonal Lasso Tool (L) or click It’s a bit more difficult but that’s the only way to proceed.5. Now, we’ll select the logo only. To do so, choose Select/Inverse (Shft+Ctrl+I), It’s almost unchanged but the dashed-line around the square border of the image has disappeared.6. Choose Edit/Copy (Ctrl+C), then Edit/Paste (Ctrl+V) to create a new layer with the “extruded” logo in it. 5. The image document now looks like shown below. The background area (which was white) has disappeared. Now you see a gray-checkboard-like texture around the logo 1 indicating that this area is in fact transparent. 6. We recommend to save the image to another file to keep the original one intact. Select “File/Save As.”, In Format box, select “PNG” (our favorite format). Please note that BMP and PSD formats also support 32 BPP / Alpha Channel. Click Save, Select Interlace: “None”, click OK.7.

Is Alpha the same as transparency?

Alpha channels can contain anything, while transparency is a specific channel relationship. And it says also, (Transparency channels) Each image pixel is represented by a set of numerical values for the visible colorants and one additional numerical value containing the opacity information.

What is an alpha texture?

Alph a An alpha channel enables you to achieve localized texture invisibility. The alpha channel uses an image to mask out areas of the surface, allowing any background to show through. This is useful for faking detail in 3D. The idea is to define areas of the surface that effectively become non-existent so that any underlying surfaces or objects show through. If you notice black areas when rendering objects that have multiple alpha surfaces, increase the Ray Depth value on the Options page of the render settings. See Ray Depth, If you apply a surface having an Alpha channel to an object and the object has no underlying surface, the object will be non-existent at the points where the alpha allows the underlying surface to show through. Alpha Channel and Antialiasing Filter Depending on the Filter Antialias settings, the Alpha channel can end up being smoothed as well. See Filter, An Alpha texture can also contain a grayscale gradient that can be used for blending. Color You can use clip mapping to mask particular areas with a Color value.

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Using this method, you pick the color from the selected image that you wish to become transparent. The downside is that often the areas you wish to become transparent contain several colors and the resulting alpha can leave a seam around the object. However, by setting the Delta color (see below), you can define by how much the color may deviate; this can help to reduce the seam.

Delta Clipping is often attempted with texture images that are antialiased; this produces a bright border around an object caused by the antialiasing of colors between the main texture and the alpha color; you can remove this border by adjusting the deviation (delta) color.

  1. Use alpha channels built in to the texture to mask areas softly and more accurately.
  2. See Image Alpha below.
  3. Invert Enabling the Invert option will invert the effect of the Alpha channel.
  4. All black areas of the alpha image will remain visible and the white areas will be masked.
  5. Soft This enables you to fade textures and surfaces from one to another, which gives you even more ways of creating realistic-looking objects.

With Soft enabled (the default setting), the Color and Delta settings lose their meaning. The texture map is now used to decide which ranges should be faded. A white texture pixel in the image means that here the surface is to be 100% opaque. If the texture pixel is black, the underlying surface shines through 100%.

  • Image Alpha With Image Alpha enabled, you can use any existing alpha channel of the loaded image.
  • Alpha channels of the TIF, TGA, PICT, PNG, and Photoshop PSD.
  • If no alpha channel is present in the image, the Image Alpha option will be ignored.
  • Use the Invert function to invert the alpha channel without having to rework the texture in your image editor.

Pre-multiplied Enable this option if you are using a texture with a pre-multiplied alpha channel. Certain graphics applications only produce this type of alpha channel.

Is Alpha transparency or opacity?

The Alpha Channel How To Create Alpha In Photoshop In this article, you’ll learn about the basic properties and definitions of the Alpha Channel. We will help you to understand and use this powerful graphic design feature for your future art creations. The Alpha Channel is a term for computer graphics and was introduced by Alvy Ray Smith and Ed Catmull in the late 1970s at the,

  1. The alpha channel concept was fully established in a paper in 1984 by Thomas Porter and Tom Duff.
  2. The alpha channel represents the degree of opacity (also defined as transparency) of a computer-generated image, video footage, or the bump, displacement, or opacity properties of a 3D texture.
  3. It must be interposed that not every video, Image, or texture format automatically contains an alpha channel.) In the alpha channel, transparency information is stored in addition to the actual image data in various graphic format options (e.g., PNG, PSD, TGA, DDS, or TIFF).

If a digital image or video footage contains an alpha channel, it signifies that additional transparency information is contained within the file besides the color components. The alpha channel contains no color information, only transparency information.

The channel is always visualized as a grayscale image. The color is typically represented in the RGB values. An alpha channel usually has the same depth as the color channel of an image. For an 8-bit image, for example, an alpha channel comprises 256 levels. The maximum number of possible transparency gradations depends on the number of bits used for the alpha channel.

The image files that contain the alpha channel are generally composed of the following components: R = Red Channel G = Green Channel B = Blue Channel A = Alpha Channel Display of the RGBA color model. The RGB channels are numerically represented via the HEX Number, which is typically displayed in the Color Picker Interface of your graphic software. On the left, the alpha channel is set to alpha=60%, which equals 60% opacity; on the right, the alpha channel is set to alpha=100%, which equals 100% opacity. In the example below, you can see the same image with: 1 – A white background.2 – A checkerboard background 3 –The grayscale image of the alpha channel. Lighter areas are more opaque; the darker areas are more transparent. How To Create Alpha In Photoshop Image source: The Alpha Value can be measured as a Real Value, a Percentage, or an Integer:

The full transparency is defined as 0.0 ; 0% or 0, visualized in the alpha channel image as pure black.The full opacity is defined as 1.0, 100%, or 255, visualized in the alpha channel image as pure white.

Most graphic design applications offer an adjustable opacity of the alpha value. Example of an RGBA image composited over a checkerboard background layer. Alpha is 0% at the top and 100% at the bottom. If you, for example, reduce the opacity of the foreground elements to alpha = 40%, the color of the underlying layer will become visible at 60% opacity in the areas where both layers overlap. Two black rectangular shapes on a white background. The rectangle on the left has the value of alpha = 100 %. The one on the right has the value of alpha = 40 %. The blending effect between the black rectangle and the white background layer creates the illusion of gray.

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Two black rectangular shapes on a white background. The rectangle on the left has the value of alpha = 100 %. The one on the right has the value of alpha = 40 %. The blending effect between the black rectangle and the white background layer creates the illusion of gray. Alpha Channels can be received and exported in three different ways: 1.

As an external or separate alpha channel2. As an integrated (premultiplied) alpha 3. As a straight alpha

How do I save a PNG as an alpha?

All Axialis Software products support images with Alpha Channel transparency. PNG, BMP and PSD file format actually support alpha channel. If you want to create a nice icon (using Axialis IconWorkshop ) or a screensaver with smooth sprites (using Axialis Professional Screen Saver Producer ) we recommend you to use images with Alpha channel.

  • Alpha channels are masks through which you can display images.
  • The alpha channel is an 8-bit channel, which means it has 256 levels of gray from 0 (black) to 255 (white).
  • White acts as the visible area; black acts as the transparent area (you see the background behind the image when displayed).
  • The level of gray in between determines the level of visibility.

For example, 50 percent gray allows for 50 percent visibility. Alpha channels are usually used with 16.8M color RGB images. The resulting image is called RGBA (RGB+A, A means alpha channel). In the illustration below you see how the alpha channel is applied to the original image to remove (visually) the orange gradient background. We’ll learn how to create a transparent image with Alpha Channel from a standard image. 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.
  • Open your image in Photoshop,
  • Select File/Open.
  • Choose your file and click Open,
  • The file open in a separate document window.
  • You can download the original image we use in this tutorial here: logo.bmp (right-click and choose Save Target As ).2.

If the file is not in RGB format (16.8 M colors), convert it: Choose Image/Mode/RGB Color,3. Now select the background area of the image (the area you wish to remove). If the image background has a solid color (white in our example), select the Magic Wand Tool (W) or click in the toolbox. Be sure to specify Tolerance=10, Anti-aliased and Contiguous in the selection options (dialog box on top, under the menu). You may need to adjust the tolerance value (it depends on your image). When done, click in the background area of the image 1 : 4. A selection dashed-line appears around the logo and around the square border of the image. It means that the background is selected (not the logo). If the background is not made of a solid color, you can select it by using the Polygonal Lasso Tool (L) or click It’s a bit more difficult but that’s the only way to proceed.5. Now, we’ll select the logo only. To do so, choose Select/Inverse (Shft+Ctrl+I), It’s almost unchanged but the dashed-line around the square border of the image has disappeared.6. Choose Edit/Copy (Ctrl+C), then Edit/Paste (Ctrl+V) to create a new layer with the “extruded” logo in it. 5. The image document now looks like shown below. The background area (which was white) has disappeared. Now you see a gray-checkboard-like texture around the logo 1 indicating that this area is in fact transparent. 6. We recommend to save the image to another file to keep the original one intact. Select “File/Save As.”, In Format box, select “PNG” (our favorite format). Please note that BMP and PSD formats also support 32 BPP / Alpha Channel. Click Save, Select Interlace: “None”, click OK.7.

What image format is best for Alpha?

Alpha Channel – In my role as a video producer and motion graphic artist, I almost always am dealing with a bunch of different image formats. All colored image formats hold values for red, green and blue channels that make up the entire color spectrum, but certain formats offer the ability to retain an additional layer of transparency or “alpha channel” that is built into the file. How To Create Alpha In Photoshop