## DocumentRecognitionSettings class

Settings for the pdf recognition. Contains elements that allow customizing the recognition process.

```csharp
public class DocumentRecognitionSettings : BaseRecognitionSettings
```

## Constructors

| Name | Description |
| --- | --- |
| [DocumentRecognitionSettings](documentrecognitionsettings#constructor)(int, int) | Initializes a new instance of the [`DocumentRecognitionSettings`](../documentrecognitionsettings) class with short set of properties. |
| [DocumentRecognitionSettings](documentrecognitionsettings#constructor_1)(int, int, Language, bool, bool, int) | Initializes a new instance of the [`DocumentRecognitionSettings`](../documentrecognitionsettings) class with full set of properties. |

## Properties

| Name | Description |
| --- | --- |
| [AllowedCharacters](../../aspose.ocr/baserecognitionsettings/allowedcharacters) { get; set; } | Allowed characters set. Determines the type of characters allowed for recognition result. |
| [AutoContrast](../../aspose.ocr/baserecognitionsettings/autocontrast) { get; set; } | Allows using an additional contrast correction algorithm for the image before recognition. |
| [AutoDenoising](../../aspose.ocr/baserecognitionsettings/autodenoising) { get; set; } | Enables the use of an additional neural network to improve the image - reduce noise. Useful for images with scan artifacts, distortion, spots, flares, gradients, foreign elements. |
| [AutoSkew](../../aspose.ocr/baserecognitionsettings/autoskew) { set; } | Gets or sets a flag indicating whether automatic image skew correction should be enabled. Enabled (true) by default. |
| [DetectAreasMode](../../aspose.ocr/baserecognitionsettings/detectareasmode) { get; set; } | Allows to select the optimal mode for document type areas: document, photo, plain text, column, image. |
| [IgnoredCharacters](../../aspose.ocr/baserecognitionsettings/ignoredcharacters) { get; set; } | Sets blacklist for recognition symbols. |
| [Language](../../aspose.ocr/baserecognitionsettings/language) { set; } | Gets or sets the language used for OCR.  Determines the alphabet used during recognition. Multi-language by default. |
| [LinesFiltration](../../aspose.ocr/baserecognitionsettings/linesfiltration) { get; set; } | Allows to recognize text in the tables (regions surrounded lines). |
| [PagesNumber](../../aspose.ocr/documentrecognitionsettings/pagesnumber) { get; set; } | Set the number of pages for recognition multipage pdf file. |
| [PreprocessingFilters](../../aspose.ocr/baserecognitionsettings/preprocessingfilters) { get; set; } | Allows to prepare the image for OCR by adjusting pre-processing methods. |
| [SkewAngle](../../aspose.ocr/baserecognitionsettings/skewangle) { set; } | Gets or sets angle in degrees for image rotation.  Setting this value will disable the [`AutoSkew`](../baserecognitionsettings/autoskew) property, so that auto skew correction is not applied. Zero by default. |
| [StartPage](../../aspose.ocr/documentrecognitionsettings/startpage) { get; set; } | Set the first page for recognition. |
| [ThreadsCount](../../aspose.ocr/baserecognitionsettings/threadscount) { set; } | Gets or sets the number fo threads for processing. By default, 0 means that the image will be processed with the number of threads equal to your number of processors. ThreadsCount = 1 means that the image will be processed in the main thread. |
| [ThresholdValue](../../aspose.ocr/baserecognitionsettings/thresholdvalue) { set; } | Gets or sets custom threshold value for image binarization. Range from 1 to 255. |
| [UpscaleSmallFont](../../aspose.ocr/baserecognitionsettings/upscalesmallfont) { get; set; } | Allows you to use additional algorithms specifically for small font recognition. Useful for images with small size characters. |

### See Also

* class [BaseRecognitionSettings](../baserecognitionsettings)
* namespace [Aspose.OCR](../../aspose.ocr)
* assembly [Aspose.OCR](../../)

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