alpha-transparency Questions
5
Solved
I'm checking that image have transparent area (alpha) or not. Bashed on that I have to change the color of UIImage
I have implement the below method to check the image have alpha or not.
- (BOOL)...
Fall asked 17/8, 2016 at 14:21
1
Solved
Consider the following small SVG showing two adjacent triangles:
<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" version="1.1">
<polygon points="10,0 60,0 35,50" style="...
Disconnected asked 23/11, 2017 at 9:6
8
Suppose you have any image (PNG or JPG).
This image has a white background and I need to make this background transparent.
I have tried with these examples:
convert original.png -background none...
Snipes asked 6/2, 2012 at 3:48
1
I'm new to Cairo, trying to create text with transparent color and stroke. stroke color's transparency works but text fill color transparency transparency_value doesn't work.
If i reduce transparen...
Objectify asked 8/4, 2017 at 19:45
2
Solved
How to create transparent activity in android in that screen tap to dismiss button automatically dismiss the activity. please provide any solution.
Laurenelaurens asked 2/5, 2013 at 6:52
1
Solved
I've got a PNG image with transparency:
original.png
Now I want to use ImageMagick to apply a diagonal gradient to its alpha channel. I mean so that its opacity remains in the top left corner, a...
Analogy asked 2/11, 2016 at 13:33
2
Solved
I have a png that i would like to load in a TBitmap32.
After I load the bitmap I call:
Bitmap.DrawMode := dmTransparent;
Bitmap.OuterColor := Bitmap.PixelS[0,0];
But then all white pixels are t...
Fransiscafransisco asked 28/8, 2015 at 8:11
4
Solved
The Quartz 2D programming guide defines the availability of the various alpha storage modes:
Which ones should we use for RGB contexts, and why?
For non-opaque contexts, kCGImageAlphaPremultipl...
Doradorado asked 18/5, 2014 at 15:26
4
Solved
I am trying to access the raw data of a Bitmap in ARGB_8888 format on Android, using the copyPixelsToBuffer and copyPixelsFromBuffer methods. However, invocation of those calls seems to always appl...
Acrodont asked 15/2, 2011 at 22:59
1
Solved
How to R plot legend with transparent background when using plot() function ?
Quadrature asked 29/4, 2016 at 13:20
2
Solved
In Objective-C with Mac OSX Cocoa, is there any way to make a DIV on a WebView slightly translucent so that the desktop applications behind the window bleed through slightly, but only on that DIV a...
Welt asked 29/12, 2015 at 5:2
2
Solved
I would like to be able to replicate the look of a primary color ('r','g' or 'b') in matplotlib with an alpha of 0.5 over a white background, while keeping the alpha at 1.
Here is an example below...
Wales asked 27/10, 2015 at 15:23
1
I have a VideoView playing a video whose shape is not rectangular, (i.e. a rotating cylinder with rounded corners). The videoview is displayed within a LinearLayout that has a background colour. I ...
Fishbowl asked 21/12, 2013 at 15:21
2
Solved
I am using a library from this github repo https://github.com/Haneke/HanekeSwift to cache the images that are being downloaded from a server. After updating to swift 2.0 everything is messed up.
I...
Lenna asked 17/9, 2015 at 20:51
2
Solved
I have a 3-channel IplImage. I would like to create a 4-channel image and set the alpha channel for it to a value less than 1.0 to make it semi-transparent.
First I set the alpha channel (the 4-th...
Ashworth asked 11/10, 2011 at 6:44
1
Solved
I've got the following image:
I'm reading it from resources, putting into ImageList and then reading it from ImageList to draw on my control's surface. But when I'm doing that, image seems to lo...
Luce asked 6/3, 2015 at 15:30
3
Solved
I have an image which has 4 channels and is in 4 * UINT8 format.
I am trying to convert it to 3 channel float and I am using this code:
images.convertTo(images,CV_32FC3,1/255.0);
After the conv...
Stewart asked 4/3, 2014 at 13:59
1
I have PNG images which I need to convert to an icon before displaying it.
This is how I did it:
public Icon ImageToIcon(Image imgTest)
{
Bitmap bitmap = new Bitmap(imgTest);
Icon icoTest;
In...
Hendrika asked 27/1, 2014 at 17:21
1
Solved
I have a simple Qt widget. It's a QLabel with a simple CSS style applied. The important part of the style is a round border:
QString css("border-style: solid;"
"border-width: 3px;"
"border-radiu...
Claudetteclaudia asked 2/12, 2013 at 9:5
2
Solved
I've been interested in this demo: http://jakearchibald.com/scratch/alphavid/
I also saw this question on here:
Can I have a video with transparent background using HTML5 video tag?
But I can't ...
Sabian asked 20/2, 2011 at 8:14
1
Solved
int imgSize = 30;
final ShapeDrawable redDot = new ShapeDrawable(new OvalShape());
redDot.getPaint().setColor(Color.RED);
redDot.setIntrinsicHeight(imgSize);
redDot.setIntrinsicWidth(imgSize)...
Hundredth asked 6/10, 2013 at 5:51
1
I've found this question and I have almost the same problem. How could I apply alpha only to a relative layout and not to it's children? Could anyone help?
I have a rectangular LinearLayou...
Washko asked 13/3, 2013 at 17:56
1
I put a JTextArea in a JPanel. This JPanel has a picture on the background, and the JTextArea is translucent (translucid red) to show the background through. I don't want the user to be able to edi...
Sparry asked 15/1, 2013 at 0:34
1
Solved
I'm plotting two semi-transparent ribbons together. Using the code below, without the scale_fill_manual portion, I get basically what I want, with a legend called "red", and labels blue and red. Ad...
Caret asked 2/1, 2013 at 23:34
4
Solved
I have a 35x40 px. png image I want to use as a custom cursor in a Swing application.
The image has a glow so contains alpha transparency values. Problem is when I attempt to use the conventional m...
Bichromate asked 10/11, 2012 at 21:28
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