Top "Alpha-transparency" questions

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

CSS opacity and child elements

<style type="text/css"> div#foo { background: #0000ff; width: 200px; height: 200px; opacity: 0.30; filter: alpha(opacity = 30); } div#foo&…

css background transparency alpha-transparency
How to set given channel of a cv::Mat to a given value efficiently without changing other channels?

How to set given channel of a cv::Mat to a given value efficiently without changing other channels? For example, …

c++ opencv matrix alpha-transparency color-channel
How to create transparent png image from bitmap?

My task is: Create a TBitmap object. Fill it with transparent color (alpha = 0). Assign this bitmap to TPngImage. Save PNG …

image delphi bitmap png alpha-transparency
Setting alpha transparency at a listView android

Hi i would like to set some transparency to my listview , i've alredy see some examples of that , but all …

java android listview alpha-transparency
openCV: adding transparency to IplImage

I have a 3-channel IplImage. I would like to create a 4-channel image and set the alpha channel for it …

opencv alpha-transparency
Video with transparency, how to display alpha channel of webm files correctly on every device; VP9 or VP8 encoding?

About how to get a transparent background with a webm video via alpha channel, here is one person that says …

android css html5-video webm alpha-transparency
ggplot2: how to transparently shade alternate days on a plot

What am I doing wrong here please? I'm trying to shade alternate 24-hr daily rectangles with transparent gray. But only …

r ggplot2 vectorization alpha-transparency occlusion
How to make alpha transparent TImage in Delphi?

On the Form I have two TImages. TImage which is on the top should be transparent, so we can see …

image delphi transparency alpha-transparency
Semi-transparency in RStudio

I'm trying to create a plot with a semi-transparent confidence region around the regression line: library(car) library(ggplot2) library(…

r pdf ggplot2 rstudio alpha-transparency