Forum Discussion

mrezahoseini's avatar
mrezahoseini
Contributor
9 years ago

How to compare two images

Hello   I've got two images, the location of one of them is on my hard disk and other one has been mapped on my the name mapping of my TC, how can I compare these two images with each other with sc...
  • osaid_ahmad's avatar
    osaid_ahmad
    9 years ago

    You can try Picture.Compare (https://support.smartbear.com/viewarticle/72669/) as suggested by somebody else also.

     

    Cosider the following VB Script taken from the above link: 
     

      Set imageOnDisk = Utils.Picture 'to obtain empty picture object
      Set actualPicOnScreen = (Aliases.page.obj).Picture    'capture yourMappedObj's image
     

     imageOnDisk.LoadFromFile("D:\Data\img1.png")
      
      ' Comparing the images using the Compare method
      If Not imageOnDisk.Compare(actualPicOnScreen ) Then
        Log.Picture imageOnDisk, "Expected Image"
        Log.Picture actualPicOnScreen, "Actual Image"
        Log.Error "The compared images are not identical"
      End If

  • mrezahoseini's avatar
    mrezahoseini
    9 years ago

    Thank you very much indeed, it works for me

     

     

baxatob's avatar
baxatob
Community Hero

Sometimes image comparison is very useful feature. In my current project we have an application (iOS), where user interacts with embedded Google Map. While he selects different items from the menu, different locations are presented on the map. I have a test to validate, that map location was correctly changed for each menu item. I have a template-image for each location - actually it's a small piece of map. Test contains a checkpoint to find a region on the map that is similar to the template. Honestly it is not a pure image comparison however the same algorithm works in this case. Pixel tolerance = 75% - I found this value by experimental way and it provides an excellent reliability and speed of the test.

tristaanogre's avatar
tristaanogre
Esteemed Contributor
9 years ago

Oh, certainly, there's a use for it... I've used it before myself. But it's dependant upon what you hope to achieve. In your case, you are actually comparing an image to an image... for application components like buttons, labels, etc, property comparisons are usually the better bet.

  • mrezahoseini's avatar
    mrezahoseini
    Contributor
    9 years ago

    I have got a logo on one of my forms and would like to verify its correctness on my logo which is saved on my hard disk.

     

    It's is all I except from comparison

     

    I tried Region.Compare, but nothing has been achieved

     

    Thanks

     

     

    • osaid_ahmad's avatar
      osaid_ahmad
      Contributor
      9 years ago

      You can try Picture.Compare (https://support.smartbear.com/viewarticle/72669/) as suggested by somebody else also.

       

      Cosider the following VB Script taken from the above link: 
       

        Set imageOnDisk = Utils.Picture 'to obtain empty picture object
        Set actualPicOnScreen = (Aliases.page.obj).Picture    'capture yourMappedObj's image
       

       imageOnDisk.LoadFromFile("D:\Data\img1.png")
        
        ' Comparing the images using the Compare method
        If Not imageOnDisk.Compare(actualPicOnScreen ) Then
          Log.Picture imageOnDisk, "Expected Image"
          Log.Picture actualPicOnScreen, "Actual Image"
          Log.Error "The compared images are not identical"
        End If

      • mrezahoseini's avatar
        mrezahoseini
        Contributor
        9 years ago

        Thank you very much indeed, it works for me