We are getting a Run-Time Error ::
Picturebox of a form is inaccessible by a class due to Protection Level Fault within a Same Application.......
Cud u juz help us to eliminate this error................
Our Code ::
class--Operator.cs
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Text;
namespace WindowsApplication7
{
public class Operator
{
private Bitmap bmpimg;
public Operator()
{
}
public void setImage(Bitmap bmp)
{
bmpimg = (Bitmap)bmp.Clone();
// PictureBox1.Image(bmpimg);
}
public Bitmap getImage()
{
return (Bitmap)bmpimg.Clone();
// bmpimg = Form1.pb_color.Image;
}
public void calcHisto(Form1 form)
{
BitmapData data= bmpimg.LockBits(new System.Drawing.Rectangle(0,0,bmpimg.Width,bmpimg.Height),ImageLockMode.ReadWrite,PixelFormat.Format24bppRgb);
unsafe
{
byte* ptr= (byte*)data.Scan0;
int remain=data.Stride - data.Width*3;
int[] histogram =new int[256];
for(int i=0;i<histogram.Length;i++)
{
histogram[i]=0;
}
for(int i=0;i<data.Height;i++)
{
for(int j=0;j<data.Width;j++)
{
int mean=ptr[0]+ptr[1]+ptr[2];
mean=mean/3;
histogram[mean]++;
ptr +=3;
}
ptr +=remain;
}
drawHistogram(histogram , form);
}
bmpimg.UnlockBits(data);
}
public void drawHistogram (int []histogram , Form1 form)
{
Bitmap bmp = new Bitmap (histogram.Length+10, 310);
form.pb_color.Image = bmp;
BitmapData data = bmpimg.LockBits(new System.Drawing.Rectangle(0, 0, bmpimg.Width, bmpimg.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
unsafe
{
byte* ptr = (byte*)data.Scan0;
int remain = data.Stride - data.Width * 3;
for (int i = 0; i < data.Height; i++)
{
for (int j = 0; j < data.Width; j++)
{
ptr[0] = ptr[1] = ptr[2] = 150;
ptr += 3;
}
ptr += remain;
}
int max = 0;
for (int i = 0; i < histogram.Length; i++)
{
if (max < histogram[i])
max = histogram[i];
}
for (int i = 0; i < histogram.Length; i++)
{
ptr = (byte*)data.Scan0;
ptr += data.Stride * (305) + (i + 5) * 3;
int length = (int)(1.0 * histogram[i] * 300 / max);
for (int j = 0; j < length; j++)
{
ptr[0] = 255;
ptr[1] = ptr[2] = 0;
ptr -= data.Stride;
}
}
}
bmpimg.UnlockBits(data);
}
}
}
form-------------Form1
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication7
{
public partial class Form1 : Form
{
private Operator processing;
public Form1()
{
InitializeComponent();
processing = new Operator();
}
private void Form1_Load(object sender, EventArgs e)
{
processingToolStripMenuItem.Enabled = false;
saveToolStripMenuItem.Enabled = false;
}
private void grayScaleToolStripMenuItem_Click(object sender, EventArgs e)
{
Bitmap grays = (Bitmap)pb_color.Image;
int width = grays.Size.Width;
int height = grays.Size.Height;
for (int j = 0; j < height; j++)
{
for (int i = 0; i < width; i++)
{
Color col;
col = grays.GetPixel(i, j);
int A = (col.R + col.G + col.B )/ 3;
grays.SetPixel(i, j, Color.FromArgb(A, A, A));
}
}
pb_color.Image = grays;
MessageBox.Show("PROCESSING COMPLETE!!");
saveToolStripMenuItem.Enabled = true;
}
private void exitToolStripMenuItem1_Click(object sender, EventArgs e)
{
this.Close();
}
private void saveToolStripMenuItem_Click(object sender, EventArgs e)
{
Bitmap b = (Bitmap)pb_color.Image;
SaveFileDialog save = new SaveFileDialog();
save.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";
if (save.ShowDialog() == DialogResult.OK)
{
b.Save(save.FileName);
}
}
private void binaryToolStripMenuItem_Click(object sender, EventArgs e)
{
int threshold = 220;
Bitmap binary = (Bitmap)pb_color.Image;
int width = binary.Size.Width;
int height = binary.Size.Height;
for (int j = 0; j < height; j++)
{
for (int i = 0; i < width; i++)
{
Color col;
col = binary.GetPixel(i, j);
int A = (col.R + col.G + col.B) / 3;
if (A <= threshold)
{
binary.SetPixel(i, j, Color.FromArgb(0,0,0));
}
else
{
binary.SetPixel(i, j, Color.FromArgb(255,255,255));
}
}
}
pb_color.Image = binary;
MessageBox.Show("PROCESSING COMPLETE !!");
saveToolStripMenuItem.Enabled = true;
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";
if (open.ShowDialog() == DialogResult.OK)
{
pb_color.Image = new Bitmap(open.FileName);
}
processingToolStripMenuItem.Enabled = true;
/*OpenFileDialog filechooser = new OpenFileDialog();
filechooser.RestoreDirectory = true;
if (filechooser.ShowDialog() == DialogResult.OK)
{
pb_color.Image = new Bitmap(new Bitmap(filechooser.FileName), 300, 300);
this.Invalidate();
}
this.processing.setImage(new Bitmap(this.pb_color.Image));
this.Invalidate();*/
}
private void button1_Click_1(object sender, EventArgs e)
{
Form2 frm2 = new Form2();
frm2.Show();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void pb_color_Click(object sender, EventArgs e)
{
}
private void histogramToolStripMenuItem_Click(object sender, EventArgs e)
{
this.processing.calcHisto(this);
this.pictureBox1.Image = this.processing.getImage();
this.Invalidate();
}
private void processingToolStripMenuItem_Click(object sender, EventArgs e)
{
}
}
}
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