Top "Alpha" questions

Merging two images

I need to merge two images (BufferedImage) in Java. It wouldn't be a problem if there was no transparency. The …

java image-processing transparency alpha

Matplotlib: plotting transparent histogram with non transparent edge

I am plotting a histogram, and I have three datasets which I want to plot together, each one with different …

python matplotlib plot histogram alpha

Remove alpha channel in an image

I have an app icon for iOS but Apple doesn't allow alpha to be in the image. How to remove …

ios image alpha

Transparent background with three.js

The code work, but I'm having a problem setting transparent background to the canvas with three.js. I use: Background.…

javascript three.js transparent alpha

Modify alpha opacity of LESS variable

Using LESS, I know that I can change the saturation or tint of a color variable. That looks like this: …

css variables less opacity alpha

Android alpha animation fadein fadeout with delays

I want to do a very simple alpha animation but I cannot find a valid way. The idea is to …

android animation alpha fadein fadeout

Transparency for windows forms textbox

I'm using windows forms in C# and I need to make a textbox's background color transparent. I have a trackbar …

c# winforms textbox transparency alpha

How to use alpha transparency in OpenGL?

Here's my code: void display(void); int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE|GLUT_…

c++ opengl transparency alpha

How to change a bitmap's opacity?

I have a bitmap: Bitmap bitmap = BitmapFactory.decodeFile("some/arbitrary/path/image.jpg"); But I'm not going to display the …

java android bitmap opacity alpha

How to set ggplot alpha (transparency) value for all points at once

library(data.table) library(ggpolot2) numPoints <- 10000 dt <- data.table(a=rnorm(numPoints),b=rnorm(numPoints)) qplot(…

r ggplot2 alpha