Image comparasion validation problems

[slavikf]

I can't make image comparasion to work.
Here are steps to reproduce:
* In Recorder, record following steps:
- start msPaint
- open some existing image from the disk
* start Ranorex Spy, capture screenshot of that image in msPaint (ElementMspaint), save it to "C:\captureTest\test.png"
* add validation code to the script:

Code: Select all

Bitmap image = Imaging.Load ("C:\\captureTest\\test.png");
Validate.ContainsImage (repo.FormScreenShot_png___Paint.ElementMspaintInfo,
	image,
	Imaging.FindOptions.Default,
	"Validation: All figures are correctly drawn");

It fails all the time. Why?

[slavikf]

In my AUT following code fails:

Bitmap image;
image = Imaging.CaptureImage (repo.FormWinstn2.ElementN59648);
image.Save (RestoreDB.SSDir+"TC611.png",ImageFormat.Png);
			
image = Imaging.Load (RestoreDB.SSDir+"TC611.png");
Validate.ContainsImage(repo.FormWinstn2.ElementN59648Info,
					image,
					Imaging.FindOptions.Default, 
					"TC611: Validation: file",
					false);

Image saved, then loaded immediately and compared and it failed! How that possible? Application doesn't change anything during that moment on screen.
Please, help.

[Support Team]

Hello,

I've modified your code in order to reproduce a possible problem:

Bitmap image;  
   image = Imaging.CaptureImage (TestForKimRepository.Instance.FormVIP_Database.ButtonAdd);  
   image.Save (@"c:\temp\TC611.png",System.Drawing.Imaging.ImageFormat.Png);
                 
   image = Imaging.Load (@"c:\temp\TC611.png");  
   Validate.ContainsImage(TestForKimRepository.Instance.FormVIP_Database.ButtonAddInfo,  
                       image,  
                       Imaging.FindOptions.Default,   
                       "TC611: Validation: file",  
                       false);

My modified version works. So there shouldn't be any principle problem.

ElementN59648 creates an adapter which means that your desktop is searched for the element. With ElementN59648Info later your desktop is searched again and a new adapter is created. Could you try something like this

Bitmap image;  
   Ranorex.Core.Element el = repo.FormWinstn2.ElementN59648;
   image = Imaging.CaptureImage (el);  
   image.Save (RestoreDB.SSDir+"TC611.png",System.Drawing.Imaging.ImageFormat.Png);

   image = Imaging.Load (RestoreDB.SSDir+"TC611.png");  
   Validate.ContainsImage(el,
                       image,  
                       Imaging.FindOptions.Default,   
                       "TC611: Validation: file",  
                       false);

Next thing to try would be the FindOptions tuning (e.g. Similarity).
It could be that the successive screenshots are not completely identical.

Regards,
Roland
Ranorex Support Team