X Y Coordinates for BitmapData

Question

0.00/5 (No votes)

See more:

.NET3.5

Hi,

Could anybody explain how to find X and Y Coordinates from BitmapData Array. Also how to scan a specific area of a image for specific color pixels. The Image size is 1280x1024 24bit, I need to scan in area between X: 50-150 & Y: 500-1000 for the color black. Also, I don't want to use Rectangle because after scanning the specific area if the result is success then the respective pixel's X and Y coordinates are used for calculating other pixels in the same image which are outside of this area.

Thanks

Posted 19-Dec-12 5:03am

Member 8741232

Updated 19-Dec-12 5:10am

v3

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

BC @ CV · Answer 1 · 2012-12-19T11:07:00

Solution 1

in the System.Drawing.Bitmap object you can use the GetPixel(x, y) to find the color of a pixel.

C#

Bitmap bmp = new Bitmap(@"C:\test.bmp");
for (int x = 0; x < 151; x++)
    for (int y = 500; y < 1001; y++)
        if (bmp.GetPixel(x, y).ToArgb() == Color.Black.ToArgb())
            MessageBox.Show("I found black!");

Posted 19-Dec-12 11:07am

BC @ CV

Updated 19-Dec-12 11:27am

v4

Comments

Member 8741232 20-Dec-12 5:09am

Hi, Thanks for making a attempt. I too am using the same, but its too slow. Thus thought of using LockBits/UnlockBits to process image faster.

BC @ CV · Answer 2 · 2012-12-20T04:36:00

Solution 2

This article seems to be what your looking for.
Work with bitmaps faster in C#[^]

Posted 20-Dec-12 4:36am

BC @ CV