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Update to latest version of SkiaSharp #7413

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Description

@chaojian-zhang

System Information (please complete the following information):

  • OS & Version: Windows 10
  • ML.NET Version: ML.NET v4.0.2
  • .NET Version: .NET 8.0

Describe the bug

In https://github.com/dotnet/machinelearning-samples, open ObjectDetection project, explicitly depend on SkiaSharp package 3.116.1, run, and observe failure:

=====Identify the objects in the images=====

System.InvalidOperationException: Splitter/consolidator worker encountered exception while consuming source data
 ---> System.MissingMethodException: Method not found: 'System.ReadOnlySpan`1<Byte> SkiaSharp.SKBitmap.GetPixelSpan()'.
   at Microsoft.ML.Data.MLImage.get_Pixels()
   at Microsoft.ML.Transforms.Image.ImagePixelExtractingTransformer.Mapper.<>c__DisplayClass5_0`1.<GetGetterCore>b__1(VBuffer`1& dst)
   at Microsoft.ML.Transforms.Onnx.OnnxTransformer.Mapper.NamedOnnxValueGetterVec`1.GetNamedOnnxValueCore()
   at Microsoft.ML.Transforms.Onnx.OnnxTransformer.Mapper.NamedOnnxValueGetterVec`1.GetNamedOnnxValueKnownSize()
   at Microsoft.ML.Transforms.Onnx.OnnxTransformer.Mapper.NamedOnnxValueGetterVec`1.GetNamedOnnxValue()
   at Microsoft.ML.Transforms.Onnx.OnnxTransformer.Mapper.UpdateCacheIfNeeded(Int64 position, INamedOnnxValueGetter[] srcNamedOnnxValueGetters, List`1 activeOutputColNames, OnnxRuntimeOutputCacher outputCache)
   at Microsoft.ML.Transforms.Onnx.OnnxTransformer.Mapper.<>c__DisplayClass14_0`1.<MakeTensorGetter>b__0(VBuffer`1& dst)
   at Microsoft.ML.Data.DataViewUtils.Splitter.InPipe.Impl`1.Fill()
   at Microsoft.ML.Data.DataViewUtils.Splitter.<>c__DisplayClass7_1.<ConsolidateCore>b__2()
   --- End of inner exception stack trace ---
   at Microsoft.ML.Data.DataViewUtils.Splitter.Batch.SetAll(OutPipe[] pipes)
   at Microsoft.ML.Data.DataViewUtils.Splitter.Cursor.MoveNextCore()
   at Microsoft.ML.Data.RootCursorBase.MoveNext()
   at Microsoft.ML.Data.ColumnCursorExtensions.GetColumnArrayDirect[T](IDataView data, Int32 col)+MoveNext()
   at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.TryGetElement[TSource](IEnumerable`1 source, Int32 index, TSource& element)
   at System.Linq.Enumerable.ElementAt[TSource](IEnumerable`1 source, Int32 index)
   at ObjectDection.Program.Main(String[] args) in C:\Projects\Intermediate\machinelearning-samples\samples\csharp\getting-started\DeepLearning_ObjectDetection_Onnx\ObjectDetectionConsoleApp\Program.cs:line 43
========= End of Process..Hit any Key ========

Root cause is ImageAnalytics.

To Reproduce
Steps to reproduce the behavior:

  1. Download and use https://github.com/dotnet/machinelearning-samples
  2. Open samples\csharp\getting-started\DeepLearning_ObjectDetection_Onnx\ObjectDetectionConsoleApp.ObjectDetection.csproj
  3. Use NuGet to explicitly install SkiaSharp version 3.116.1
  4. Run
  5. Fail

Expected behavior

Shouldn't fail or are there alternatively/ways to configure?
Also the package dependency of ML.Net.ImageAnalytics claims SkiaSharp >2.88

Screenshots, Code, Sample Projects
See log error above.

Additional context
I am using ML.Net in a project that already depends on SkiaSharp explicitly.

Activity

  1. changed the title [-]ObjectDetection demo fails with SkiaSharp 3.116.1[/-] [+]Update to latest version of SkiaSharp[/+] on Mar 10, 2025
  2. michaelgsharp commented on Mar 10, 2025

    @michaelgsharp
    Contributor

    So essentially we need to get the version of SkiaSharp updated.

  3. added this to the ML.NET 5.0 milestone on Mar 10, 2025
  4. Sicos1977 commented on Jul 25, 2025

    @Sicos1977

    Any updates on this?

  5. Eddie-Hartman commented on Feb 18, 2026

    @Eddie-Hartman

    @stephentoub Reaching out to you since this seems to have slipped through the cracks and I can't really tell who is the primary maintainer of this repo anymore. This issue is still a problem and has been around for quite a while. As more projects try to upgrade (which is what just happened to me today), this will become a more prevalent issue. Can we get this addressed?

  6. locked and limited conversation to collaborators on Apr 20, 2026
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