Community discussion forum

Analyse the picture and produce control

• • Reply

  9 months ago

  by premever

  prem kumar

  chennai, India

  Joined 11 months ago
  Hello Friends, I have a small problem in processing image. My project is to get a certain amount of pixels and according to the color, i have to produce a control and display the selected pixels. Since i am new to the technology, i have some problem of using getpixel() and setpixel() functions, i searched for the net for more codes but its not working on my system. The code i written is using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace WindowsApplication2 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } Bitmap image1; private void button1_Click(object sender, EventArgs e) { try { // Retrieve the image. image1 = new Bitmap(@"C:\picture2.bmp", true); int x, y; // Loop through the images pixels to reset color. for (x = 0; x < image1.Width; x++) { for (y = 0; y < image1.Height; y++) { Color pixelColor = image1.GetPixel(x, y); //Color newColor = Color.FromArgb(234,456,765); image1.SetPixel(x, y, Color.FromArgb(255,(Int32)(0.5 * pixelColor.R + 0.3 * pixelColor.G + 0.2 * pixelColor.B), (Int32)(pixelColor.R + 0.3 * pixelColor.G + 0.2 * pixelColor.B), (Int32)(pixelColor.R + 0.3 * pixelColor.G + 0.2 * pixelColor.B))); } } this.Invalidate(); // Set the PictureBox to display the image. pictureBox1.Image = image1; // Display the pixel format in Label1. label1.Text = "Pixel format: " + image1.PixelFormat.ToString(); } catch (ArgumentException) { MessageBox.Show("There was an error." + "Check the path to the image file."); } } this code is correct but its not displaying the image for the algorithm i wrote in color.Fromargb(). when i run this program it shows the exception i wrote in catch block. In the function argument fromargb(), what ever the integer values i give otherthan the algotrithm also it goes to the catch block. But the file path i gave is correct.When i give simple arguments to Fromargb(pixelcolor.R,0,0) it showing the picture. Please help me in solving the problem r else tell me do i use the fromargb() function wrongly. Anyone please help me.......
  Post was edited on 15/02/2009 11:20:28 Report abuse