I have to blur a selected rectangle from an image in VB?

Question

0.00/5 (No votes)

See more:

i want to detect number plate from an image and blur that rectangle part. i have already detected number plate and for blurring, i have a problem with the selected rectangle.
whole image is getting blurred, but i want only selected part.

What I have tried:

i have tried Gaussian blur function.

Posted 3-May-18 21:26pm

Member 13458399

Updated 3-May-18 23:04pm

Add a Solution

Comments

dan!sh 4-May-18 3:40am

You should update the question with the code that you have tried so far.

Maciej Los 4-May-18 4:26am

If you're able to detect rectangle of image with number plate, you're able to blur that region of image.

1 solution

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)

Maciej Los · Accepted Answer · 2018-05-03T23:05:00

Solution 1

Take a look at these examples:
Creating a Gaussian Blur with VB.NET[^]
Gausian and Alpha Blurring[^]

Both uses 2 loops, which changes pixels from 0 to Width/Height of Image:

VB

' Loop the rows of the image
For PixelY = 0 To bmp.Width - 1
    ' Loop the cols of the image
    For PixelX = 0 To bmp.Height - 1

All what you need to do is to blur pixels occupied by number plate ;)

|----------------------------| <--- image
|                            |
|                            |
|    |--------|              |
|    |--------| <------------------ number plate
|                            |
|                            |
|----------------------------|

Posted 3-May-18 23:05pm

Maciej Los

Comments

Member 13458399 4-May-18 6:05am

Thanks for the answer.
ptfRectPoints = licPlate.rrLocationOfPlateInScene.GetVertices() 'get 4 vertices of rotated rect

Dim pt0 As New Point(CInt(ptfRectPoints(0).X), CInt(ptfRectPoints(0).Y)) 'declare 4 points, integer type
Dim pt1 As New Point(CInt(ptfRectPoints(1).X), CInt(ptfRectPoints(1).Y))
Dim pt2 As New Point(CInt(ptfRectPoints(2).X), CInt(ptfRectPoints(2).Y))
Dim pt3 As New Point(CInt(ptfRectPoints(3).X), CInt(ptfRectPoints(3).Y))

i have rectangle's points can i use them to blur a inner portion of that rectangle?

Maciej Los 4-May-18 8:08am

Please, read this: Determining Whether A Point Is Inside A Complex Polygon[^]

Wendelius 4-May-18 13:05pm

Nicely explained, a 5.

Maciej Los 4-May-18 14:35pm

Thank you, Mika.