## PreprocessImage(string, PreprocessingFilter) {#preprocessimage_1}

Use image preprocessing to improve the accuracy of OCR. Create a list of filters that will be applied to the input image in the order you specify. example to create filters: PreprocessingFilter filters = new PreprocessingFilter { PreprocessingFilter.Invert(), PreprocessingFilter.Threshold(150), PreprocessingFilter.Binarize(), PreprocessingFilter.Rotate(180), PreprocessingFilter.Resize(3000,3000, Aspose.OCR.Filters.InterpolationFilterType.Box), PreprocessingFilter.Scale(6f), PreprocessingFilter.Dilate() }; You don't need all of them. Set only what you need.

```csharp
public MemoryStream PreprocessImage(string fullPath, PreprocessingFilter filters)
```

| Parameter | Type | Description |
| --- | --- | --- |
| fullPath | String | Full path to the image. |
| filters | PreprocessingFilter | Image optimization filters[`PreprocessingFilter`](../../../aspose.ocr.models.preprocessingfilters/preprocessingfilter). |

### Return Value

Stream with modified image so you can save or recognize it.

### See Also

* class [PreprocessingFilter](../../../aspose.ocr.models.preprocessingfilters/preprocessingfilter)
* class [AsposeOcr](../../asposeocr)
* namespace [Aspose.OCR](../../asposeocr)
* assembly [Aspose.OCR](../../../)

---

## PreprocessImage(MemoryStream, PreprocessingFilter) {#preprocessimage}

Use image preprocessing to improve the accuracy of OCR. Create a list of filters that will be applied to the input image in the order you specify. example to create filters: PreprocessingFilter filters = new PreprocessingFilter { PreprocessingFilter.Invert(), PreprocessingFilter.Threshold(150), PreprocessingFilter.Binarize(), PreprocessingFilter.Rotate(180), PreprocessingFilter.Resize(3000,3000, Aspose.OCR.Filters.InterpolationFilterType.Box), PreprocessingFilter.Scale(6f), PreprocessingFilter.Dilate() }; You don't need all of them. Set only what you need.

```csharp
public MemoryStream PreprocessImage(MemoryStream stream, PreprocessingFilter filters)
```

| Parameter | Type | Description |
| --- | --- | --- |
| stream | MemoryStream | Memory stream containing the image. |
| filters | PreprocessingFilter | Image optimization filters[`PreprocessingFilter`](../../../aspose.ocr.models.preprocessingfilters/preprocessingfilter). |

### Return Value

Stream with modified image so you can save or recognize it.

### See Also

* class [PreprocessingFilter](../../../aspose.ocr.models.preprocessingfilters/preprocessingfilter)
* class [AsposeOcr](../../asposeocr)
* namespace [Aspose.OCR](../../asposeocr)
* assembly [Aspose.OCR](../../../)

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