[Bug] Pixel arithmetic results in error: Emgu.CV.Util.CvException: OpenCV: 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows

[Drynwhyl]

System

UVtools v4.4.1 X64
Operative system: Microsoft Windows 10.0.19045 X64
Processor: AMD Ryzen 5 7600 6-Core Processor              
Processor cores: 12
Memory RAM: 10.42 / 27.62 GB
Runtime: win10-x64
Framework: .NET 6.0.33
AvaloniaUI: 11.1.3
OpenCV: 4.9.0

Path:       C:\Program Files\UVtools\
Executable: C:\Program Files\UVtools\UVtools.exe
Loaded file: The Rotten Base_10h06m_46ml_copy.pwma [Version: 516] [Class: PhotonWorkshopFile]

Printer and Slicer

• Printer: Photon Mono 4K
• Slicer: Lychee 6.2.0

Description of the bug

Following error occurs when I try to perform pixel arithmetic operation on multiple layers. It is not consistent, it may occur on different layers of the same file. If I'm lucky enough after 8-10 attempts it completes without error, but sometimes I just give up after 20+ tries:
Emgu.CV.Util.CvException: OpenCV: 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows
at Emgu.CV.CvInvoke.CvErrorHandler(Int32 status, IntPtr funcName, IntPtr errMsg, IntPtr fileName, Int32 line, IntPtr userData)
at Emgu.CV.MatInvoke.cveMatCreateFromRect(IntPtr mat, Rectangle& roi)
at UVtools.Core.Extensions.EmguExtensions.Roi(Mat mat, Rectangle roi, EmptyRoiBehaviour emptyRoiBehaviour) in UVtools.Core\Extensions\EmguExtensions.cs:line 944
at UVtools.Core.Operations.OperationPixelArithmetic.<>c__DisplayClass149_0.b__0(Int64 layerIndex) in UVtools.Core\Operations\OperationPixelArithmetic.cs:line 924
at System.Threading.Tasks.Parallel.<>c__DisplayClass20_01.<ForWorker64>b__1(RangeWorker& currentWorker, Int32 timeout, Boolean& replicationDelegateYieldedBeforeCompletion) --- End of stack trace from previous location --- at System.Threading.Tasks.Parallel.<>c__DisplayClass20_01.b__1(RangeWorker& currentWorker, Int32 timeout, Boolean& replicationDelegateYieldedBeforeCompletion)
at System.Threading.Tasks.TaskReplicator.Replica.Execute()

How to reproduce

1. Go to "Tools" -> "Pixel Arithmethic"
2. Make sure layer range is set to all layers
3. Set Operator: Subtract with brightness
4. Set Apply to: Model surface
5. Set brightness: Use a pattern instead of fixed brightness
6. Set Alternate pattern every "1" layers
7. Set pattern to:
   0 32
   32 0
8. Set alternate pattern to:
   32 0
   0 32
9. Click "Pixel arithmetic" button to start operation
10. Result: Error should occur

Files

No response

[github-actions]

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[sn4k3]

This is the same as #905
I also cannot reproduce using your workflow.
Can you provide the file? Does it happen every time to you?

[Drynwhyl]

It happens almost every time with large file (2000-3000 layers). If it's something small (around 300-500 layers) it can work first try.
Here is the file link: https://drive.google.com/file/d/1q6aH6RXziXLpUuh7nYFL_CXULw_LoCrW/view?usp=sharing

[sn4k3]

Tested with your file and it works fine, I ran 5 times the operation without errors.
Need to dig into this and see if I can spot the problem