Tag Info

Hot answers tagged

122

To expand on utopicam's answer, sometimes your image might contain areas, such as shadows, that you'd want to be semitransparent. For example, let's say you have a photo shot in a lightbox, such as this nice and freely licensed picture of a Swedish wooden toy horse courtesy of Creative Tools: In general, the first step would be to adjust the levels of ...


59

One method is to use the original image/layer as its own layer mask. You'd create a duplicate of the layer, desaturate and invert it, pasting the greyscale result into the original layers layermask. Update: Here are some step by step instructions: Start with your flattened image: Add a Saturation/Hue adjustment layer and turn down the Saturation until ...


35

You can use blending to add transparency: Right click the layer you want to add transparency to, pick the "Blending Options..." (If unable to pick 'Blending options' ensure that the layer is unlocked) Locate the scale under the "This layer:" that is under the "Blend if" box Press and hold the alt key while dragging on the white knob, the further you drag ...


26

GIMP's Color to Alpha tool is very handy if you know how to use it, and this task seems particularly well suited for it: Open the image in GIMP, and change it to RGB color mode if necessary. Select Layer → Transparency → Color to Alpha... Select black (#000000) as the color to make transparent. Click "OK". Save the resulting image in PNG format: ...


23

The picture doesn't change. The background color of the page does. It's a transparent PNG. The whites are not visible on a white background. The blacks aren't visible on black background. The normal post is on white. The modal view is on black. If you change the background color...


22

The main trick, in my experience, to adding smooth transparency to an image in GIMP is using the Layer → Transparency → Color to Alpha... tool. Of course, you have to know how to use it to good effect — on its own, all it does is make your images look all funny and translucent. If I take the image you posted above, and just run Color to ...


21

You don't see the transparency effect if there's nothing below the layer because there's nothing there for Photoshop to calculate (all these blend modes involve calculations based on the values of the corresponding pixels on each layer), so it just shows you the image. In this particular case (as Farray pointed out while I was writing this!), you can pull ...


15

The alpha value is used in the RGBA colour space to indicate the transparency of a colour. The alpha value goes from 0 to 1 where 0 is completely transparent and 1 not transparent at all. This allows to do "alpha compositing" which, in lay terms, is the process of placing an image on top of a background and to combine the colours to create the illusion of ...


13

How about a light box? They are cubes made of some sort of semi-translucent fabric that diffuses the light. You can probably find something like that in your local photography equipment store. Here is one: http://www.ezcube.com/ I made my own, though, out of cardboard and velum paper. And I used plain 100W lights instead of professional ones. Here is a ...


12

Sounds like you need to crop certain parts of the jpgs (the main figure, for example) and delete the "background". You can do so using the lasso tool. The gimp website has lots of tutorials and explanations. Check this http://docs.gimp.org/en/gimp-painting.html#gimp-concepts-selection and this out: http://docs.gimp.org/en/gimp-tool-free-select.html The ...


12

I'm not sure why you're rasterizing the layers, nor why you would want to copy and paste rather than place the image in AI. If there isn't a vital reason for that workflow, Place the PSD in Illustrator (File > Place) instead. All of the transparency is preserved, layers are intact. Once the image is placed, you can embed it if necessary. One of the embed ...


10

For this, you best create separate channels for the shadows and highlights. The shadows can be directly taken from the white T-Shirt, and be used as a multiplicator (0-100%) for the shirt's color (layer mode: multiply) As for the highlights, this really depends on the material. Cloth doesn't reflect much light on the surface, so most of its color comes ...


10

Using bucket fill instead of contour selection Note: This tutorial is also available in PDF. Add an alpha channel Some image types lack a transparency channel; JPG for example. If this is the case, add an alpha transparency channel. This is done by selecting Layer → Tranparency → Add Alpha Channel. Bucket fill with colour The next step is filling the ...


9

The way transparency works with 8-bit gifs/pngs is that a pixel is either fully transparent or fully opaque. On the corners of a circle where the circle blends transparently to the background, there are usually pixels that are semi-transparent to smoothen the transition. This smooth transition can not fully be reproduced with 8-bit gifs/pngs. One way of ...


9

This is something I was looking for as well. The code was almost identical to the sample code of the CodeLab Tutorial Part 1 - Simple plugins walkthrough. So after a couple minutes, there is now a simple plugin to do this job right from Paint.NET. https://dl.dropboxusercontent.com/u/90776664/Paint.NET/AlphaColor.dll


9

When assigning white as alpha channel for transparency we will not be able to have opaque highlights, as these per definition will be white, hence fully transparent. To have an alpha channel sparing both highlighted white areas, and black shadows we better choose a grey color for assigning alpha. To show the effect more clearly I first made your original ...


9

There is a very fast and efficient method to remove single pixel noise from a transparent background shown in this example picture: Use the fuzzy select tool to select the fully transparent background with following settings: Select Antialiasing Select Feather Edges Adjust feather radius to include the size of all noize pixels. Tick Select transparent ...


9

Some initial notes Lets make a google search (images): https://www.google.com.mx/search?q=crystal+logo 1) You can see how difficult is to make an abstraction of a crystal. Verey few logos succed there. 2) "How to make an ilustration" depends on what kind of ilustration do you want. The key word here is "style". Depending on what is this aproach the look ...


8

OK, so I assume you have two images: a normal image that you want to add transparency to, and a grayscale image that you want to use as its alpha (transparency) channel, something like these: (Base image based on this photo by John Fielding, used under the CC-By-SA 2.0 license; alpha mask created by me using the GIMP's Sphere Designer tool.) There are ...


8

I have had some luck "hacking Ikea" for similar projects. For greenscreen-effects, they even have bright green tables :D. This is but one alternative, and you find instructions here, at IkeaHackers With the use of two hampers, this is the result: But here is the real crux: succeeding with this, lighting is alpha and omega. You will need at least three ...


7

And just to be complete, here is the GIMP answer. Just do: Colors > Color to Alpha ... select Black Click OK if "Color to Alpha ..." is greyed out you need to set the Image mode to something else than indexed, e.g.: Image > Mode > RGB


7

Long story short, .eps is the slow cousin of .pdf. Use .pdf. Your .pdf problem is, I think, no problem at all.. As long as you save your file as Pdf 1.4 or higher, you should be good to go. Pdf 1.4 is the earliest pdf version to support transparency. Since you said that "it always comes with a full white background", I'm assuming that you tried viewing ...


7

I know you said you're not comfortable with command line tools, but ImageMagick can do this: Replace a Specific Color convert balloon.gif -transparent blue balloon_trans.gif Where balloon.gif is the source image, -transparent specifies that you want a transparent bg, blue is the color you want to replace, and balloon_trans.gif is the ...


7

Whenever we choose to change a color to transparent with the Layer > Transparency> Color to alpha tool we will also introduce semi-transparency of colors different to the selected. Below this is shown for making white in the background transparent: In case this is not wanted we need to select only a single colored area for transparency. This can be done ...


7

Pathfinder, while it will work in many cases, is a completely destructive method and once done, it can not be undone or adjusted easily most of the time. Instead..... Use an Opacity Mask. The Opacity Mask method allows you to not only adjust the artwork with the same ease you already have, but also lets you adjust the texture and the amount of knock out ...


7

Simply save/export a PNG24 image using Adobe Photoshop which contains transparency. Transparency is the remaining 8 bits. 24Bit PNG = 8 bits red, 8 bits blue, 8 bits green 32bit PNG = 8 bits red, 8 bits blue, 8 bits green, 8 bits alpha Photoshop automatically creates a 32bit PNG image if you save a 24Bit PNG that contains transparent areas.


7

Select the white object Choose "Path" > "Stroke to path" Select both objects and choose "Path" > "Difference". (The white object will need to be on top, which clearly it is in this case.)


6

I completely understand your pain. Here is my solution :) Extract Alpha as Mask Action Here is what it does: Edit: I hope this helps :)


6

This will require a little experimentation. As with most things in Photoshop, there are multiple ways to get there. Method 1: Eyedropper a solid part of the red cloud to make it the foreground color. Choose Select > Color Range. Set your Selection Preview to "Grayscale" and the preview thumbnail to "Image" so you can see what you're doing. Uncheck ...



Only top voted, non community-wiki answers of a minimum length are eligible