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Questions tagged [getpixel]

GetPixel is a Windows GDI API function which retrieves the RGB color value of the pixel at a specific coordinates.

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CopyFromScreen and GetPixel performance issues

I am using a GetPixel function to take a pixel from the screen and return its colour: int GetPixel(int X, int Y) { Bitmap bmp = new Bitmap(1, 1, PixelFormat.Format32bppPArgb); Graphics grp = Graphics.FromImage(bmp); …
Pedro Barros
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Android Bitmap.getPixel() Is Annoyingly Inaccuracte

Project OverView : Theres two images. Click the top image (in my app i use a cat pic) and it will set the bottom image background to the color of the pixel on the location you clicked at. The Problem: The background color doesn't match the color of…
Witch
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how to get all RGB values from a pixel in Python?

When I run this code, I get a single value for the pixel,now I don't know what the single value represents..red, green, blue, or some average of them all. I was wondering how I can get all the values of RGB separate, like in a tuple or some other…
Teemo
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get color of each pixel from sl::zed::Mat

i have a variable sl::zed::Mat and i want to get color of each pixel from that Mat. i was tried using getValue(x,y) to get 3 channels, but i can't get reach the value over 50. here's my codes: sl::zed::Mat color = data->_color; sl::uchar3 bgrPixel…
Aziz Nurfalah
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How to copy pixels from one bitmap to another shaped like a circle?

I am using setPixel and getPixel functions but they are using matrices which is naturally rectangle.I am trying to copy pixels shaped like circle ! update : now i am using this but i hope there is something more efficient than this one : for(int…
Tony
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COLORREF as RGB or hexadecimal

I have my current code that reads the GetPixel from the current cursor position but the return value is just some insane value by COLORREF and I want it to be in RGB. I looked into Microsoft Reference and I found RGB Macro COLORREF RGB( BYTE…
Matthew Mackday
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Aforge.NET - Get items from StringBuilder

I'm creating a program that is designed to check multiple choice tests. My application is meant squares which will search the pixels of a different color than the background color (white). Stringbuilder I used to line up the position of individual…
k1dl3r
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GetBValue Error: Expression must have integral or unscoped enum type

I am writing a simple program to read the pixel at a particular location and get its individual R,G and B values for further processing. I am able to read the R and the G values but I get an error when I read the B value. Here is my complete code…
newbie2015
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How to display bmp color value on TextView

I want to get a color value bmp image is displayed on Textview This is my bmp image, size 16X24 I tried to do a button when the button is pressed bmp image color values will be displayed in the TextView But after pressing a button the program…
Ban Lin
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getPixel() giving 0 for PNG Bitmap:Android

I am facing this problem for 2 days now. I am making a 2D game via Canvas and it has a PNG file which I am drawing on the canvas by drawBitmap(), and it works fine. But for Per-Pixel-Collision detection, I am using getPixel(), but it's always…
Sucho
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How do I correct this LockBits math error?

Using GetPixel/SetPixel, I was using the following to power an image filter that emphasizes reds and purples: for (int y = 0; y < bmpMain.Height; y++) for (int x = 0; x < bmpMain.Width; x++) { bmpMain.GetPixel(x, y); Color c…
MaoTseTongue
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Get pixel colors from an Image?

I was trying to create an app which can get the pixel colors of an image. I successfully created a camera app which can take a photo and it infuse an ImageView. So far my idead is working, but I don't know how should I retrieve a pixel color. I was…
Mistic
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C# Problem with getPixel & setting RTF text colour accordingly

Heyo, I'm messing with converting images to ASCII ones. For this I load the image, use getPixel() on each pixel, then insert a character with that colour into a richTextBox. Bitmap bmBild = new Bitmap(openFileDialog1.FileName.ToString()); //…
pastapockets
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Determine if getPixel() value is greater than or less than 50% gray

I am trying to loop through a bitmap and determine if each pixel is lighter or darker than gray using getPixel(). Problem is, I am not sure how to tell whether the value returned by getPixel() is darker or lighter than gray. Neutral gray is about…
cmal
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Getting pixel color from bitmap (javascript) not working

I am working on a simple game using Three.js on javascript. I need to use a bitmap to create the scenario. My bitmap is basically a 15x15 pixel All I want to do is get the rgb value for every pixel on this image. This is the code I have so…
user3758765
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