How Can I Convert My new Byte Array To Image

Question

2.00/5 (2 votes)

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i have write this code for extracting bitplane1 of my image . but i have exception

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Collections;


namespace bitplane
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)

        {
          //  Image grayImage;
            OpenFileDialog o = new OpenFileDialog();
            o.ShowDialog();
   
            byte[] x = File.ReadAllBytes(o.FileName);
        
            byte maskbyte1 = 2;
            int [] newpix= new int [x.Length];
      for (int i = 0; i < x.Length; i++)
           {


               newpix[i] = x[i] & maskbyte1;

               string px=newpix[i].ToString();
     

              x[i] = Convert.ToByte(px);
              
        }
            MemoryStream ms = new MemoryStream(x);
            Image myImage = Image.FromStream(ms);

        myImage.Save(@"C:\Users\Public\Pictures\Sample Pictures\New folder\fgh.jpg");
        }
    }
}

Posted 5-Mar-14 1:34am

ilia71

Updated 5-Mar-14 2:04am

phil.o

v3

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PJ003 · Answer 1 · 2014-03-05T02:01:00

Solution 1

use the below code in httphandler to convert byte array to image

C#

context.Response.ContentType = "image/jpeg";//get image content type of selected file
Stream strm = new MemoryStream(x);
byte[] buffer = new byte[4096];
int byteSeq = strm.Read(buffer, 0, 4096);
while (byteSeq > 0)
{
  context.Response.OutputStream.Write(buffer, 0, byteSeq);
  byteSeq = strm.Read(buffer, 0, 4096);
}

Posted 5-Mar-14 2:01am

PJ003

Updated 5-Mar-14 2:02am

v2

Comments

ilia71 5-Mar-14 8:09am

thanks but do you read my code ? i get an image and convert it to a byte array so after i change this byte array i want to convert this new byte array to image ? could you please give me some advice ?
best regards

Sergey Alexandrovich Kryukov 5-Mar-14 12:49pm

What is really bad in your code: immediate constant 4096 taken from nowhere and corresponding limitation. In fact, there is absolutely no need in it.
—SA

Sergey Alexandrovich Kryukov · Answer 2 · 2014-03-05T06:53:00

Solution 2

You are using correct approach, but only in two lines related to MemoryStream and the fragment where you read bytes from a file. Everything else is some gibberish I cannot understand. Throw it out and you will have a working solution. If you have some problems, use the debugger.

—SA

Posted 5-Mar-14 6:53am

Sergey Alexandrovich Kryukov