Get Grayscale Value of grayscale image (RGB)
CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com
Results 1 to 2 of 2

Thread: Get Grayscale Value of grayscale image (RGB)

Hybrid View

  1. #1
    Join Date
    Jan 2013
    Posts
    6

    Get Grayscale Value of grayscale image (RGB)

    I'm making simple application for image recognition using grayscale image format. The problem is how to get the value of a grayscale image. Its value is RGB or pixel. Then the value will be used as a comparison between the sample images with the image to be recognized.

    I have a sample program but can not use this code to VB.net, because the code for vb.6. Can someone help me convert this code to vb.net? Or do you have another solution?

    I was more expecting another solution to this problem in VB.net code.

    Thank you very much
    Code:
    For Y = 1 to Picture1.scaleheight
    For x = 1 to Picture1.ScaleWidht
    
    p = Get pixel (picture1.hdc, X,Y)
    r= p and &HFF
    g = (p\&H100)and &HFF
    b = (p\&H10000)and &HFF
    
    grtotr=grtotr + r
    grratr = Round(gtotr/(picture1.ScaleHeight*Picture1.Scalewidht),2)
    
    grtotg=grtotg + g
    grratg = Round(gtotg/(picture1.ScaleHeight*Picture1.Scalewidht),2)
    
    grtotb=grtotb + b
    grratb = Round(gtotb/(picture1.ScaleHeight*Picture1.Scalewidht),2)
    
    Next
    Next
    ' the result of the calculation transferred to textbox
    Text1.text = grratr ' R value
    Text2.text = ggratg 'G value
    Text3.text = ggratb ' B value

  2. #2
    Join Date
    Jul 2001
    Location
    Sunny South Africa
    Posts
    11,091

    Re: Get Grayscale Value of grayscale image (RGB)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Azure Activities Information Page

Windows Mobile Development Center


Click Here to Expand Forum to Full Width

This is a CodeGuru survey question.


Featured


HTML5 Development Center