pixel

I'm working on a .NET C# project and would like to get the pixel value when I click a picturebox, how can I achieve that? The basic idea is that when I click anywhere in the picturebox, I get the pixelvalue of that image point.. Thanks! Use this: private void pictureBox2_MouseUp(object sender, MouseEventArgs e) { Bitmap b = new Bitmap(pictureBox1.Image); Color color = b.GetPixel(e.X, e.Y); } As @Hans pointed out Bitmap.GetPixel should work unless you have different SizeMode than PictureBoxSizeMode.Normal or PictureBoxSizeMode.AutoSize . To make it work all the time let's access private

I am trying to render two svg lines using path element. The first line has 1px width and it is sharp The second line has 2px width and it is blurred The stroke-width is the same for both. How to fix this <svg xmlns="http://www.w3.org/2000/svg" version="1.1"> <path style="stroke-width:1;stroke:red;opacity:1;" d="M 300.5 250 L 300.5 300 "></path> <path style=" stroke-width:1;stroke:red;opacity:1;" d="M 350 250 L 350 300 "></path> </svg> Mainly it's the 0.5 offset that makes the line sharp. By default, integer coordinates map to the intersections of the pixel squares. So a width-1 horizontal

Given a TextView , is it possible to know at runtime the X and Y coordinates of where it is drawn? Is it also possible to know the size (width/length) in pixels? There are getLeft() , getTop() , getWidth() , getHeight() methods for a view, it works for textView too. for more information , see the following link... getLeft() and getTop() will return you the starting x,y co-ordinates. http://developer.android.com/reference/android/view/View.html Coordinates relative to parent int x = textView.getLeft(); int y = textView.getTop(); Absolute coordinates int[] location = new int[2]; textView

Edit: I don't necessarily need a solution to this problem--rather I'd like to understand why it's occurring. I don't see why I should be getting the odd results below... Although this question is directed towards an issue I'm having with an HTML5 canvas application, I think the problem is less specific. I have an HTML5 canvas app that allows you to stamp images on the screen. These images are 32bit PNG's, so I'm working with transparency. If I stamp a highly transparent image in the same location many times (roughly 100), I end up with an absolutely terrible result: The color of the image that

This question already has an answer here: Changing pixel color value in PIL 4 answers I am working on an Image Processing Project and I am a beginner at Python and using PIL. Any help would be appreciated. So, what I am doing is, I have an image of space with stars and noise. What I want to do is keep only the brighter pixels and filter out the dull ones. For now, this is my basic step at trying to remove the noise. After studying the image data, I found that values of 205 are quite possibly the ones I want to keep the threshold at. So what I am doing in the code is, open the image and change

How it's possible to get the transparency value of a pixel on an image ? 'imagecolorat' picks only the index of the color of the pixel at the specified location in the image. With that index I can get the RGB values but not the transparent one. Hope you understand, and thank you in advance. As far as I know, the transparency value is returned by the function imagecolorat . Could you try: $color = imagecolorat($image, $x, $y); $transparency = ($color >> 24) & 0x7F; The transparency is a integer between 0 and 127 so we need to mask the first 8 bits of the 32bit color integer. the solution could