## PreprocessingFilter.ToGrayscale method

Converts an image to grayscale image. Grayscale image have 256 level of light in image (0 to 255).

```csharp
public static PreprocessingFilter ToGrayscale()
```

### Return Value

GrayscaleFilter object.

### See Also

* class [PreprocessingFilter](../../preprocessingfilter)
* namespace [Aspose.OCR.Models.PreprocessingFilters](../../preprocessingfilter)
* assembly [Aspose.OCR](../../../)

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