Top "Alpha-transparency" questions

The alpha transparency of an image defines how transparent the pixels of this image are.

Replace transparency in PNG images with white background

I've got some PNG images with transparency, and I need to create versions with the image layer composed onto a …

png imagemagick alpha-transparency
Set transparent background using ImageMagick and commandline prompt

Suppose you have any image (PNG or JPG). This image has a white background and I need to make this …

png imagemagick alpha-transparency
Transparent equivalent of given color

I've had this a few times, so here goes: I'm making some plots which hold curves with estimates of a …

r colors alpha-transparency
Using Graphics.DrawImage() to Draw Image with Transparency/Alpha Channel

I'm copying an image. (My actual code is resizing the image but that's not relevant to my question.) My code …

c# .net drawimage alpha-transparency
Is there a way to set drawable's Alpha using XML?

Easy like itself . I wanna make an alpha button , which would have a selected drawable this way: <?xml version="1.0" …

android drawable alpha-transparency
Setting alpha on UIView sets the alpha on its subviews which should not happen

According to the documentation for UIVIew @property(nonatomic) CGFloat alpha The value of this property is a floating-point number in …

ios objective-c uiview alpha-transparency
Convert Transparent PNG to JPG with Non-Black Background Color

I'm using System.Drawing.Image in .Net to do a simple conversion from png to jpeg. I'm basically just using …

c# .net image-conversion alpha-transparency
Set alpha-transparency only to layout and not to it's children

I've found this question and I have almost the same problem. How could I apply alpha only to a relative …

android android-layout alpha-transparency
How to create an h264 video with an alpha channel for use with HTML5 Canvas?

I've been interested in this demo: http://jakearchibald.com/scratch/alphavid/ I also saw this question on here: Can I …

html canvas h.264 alpha-transparency
geom_rect and alpha - does this work with hard coded values?

Same title, completely reworded the question though. Why does the alpha work in the first plot but not the second? …

r ggplot2 alpha-transparency