# MultiFrameResultCrossFilter The `MultiFrameResultCrossFilter` class is responsible for filtering captured results. As a default implementation of `CapturedResultFilter`, it provides results verification and duplicate results filtering features. ## Definition *Namespace:* Dynamsoft.Utility *Inheritance:* [CapturedResultFilter](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/capture-vision-router/auxiliary-classes/captured-result-filter.md) -> MultiFrameResultCrossFilter ```csharp public class MultiFrameResultCrossFilter : CapturedResultFilter ``` ## Methods | Method | Description | | ----------------------------------------------------------------- | ---------------------------------------------------- | | [`MultiFrameResultCrossFilter`](#multiframeresultcrossfilter) | Default constructor of a `MultiFrameResultCrossFilter` object. | | [`EnableResultCrossVerification`](#enableresultcrossverification) | Enables result cross verification feature to improve the accuracy of video streaming recognition results. | | [`IsResultCrossVerificationEnabled`](#isresultcrossverificationenabled) | Determines whether the result cross verification feature is enabled for the specific captured result item type. | | [`EnableResultDeduplication`](#enableresultdeduplication) | Enables result deduplication feature to filter out the duplicate results in the period of `duplicateForgetTime` for video streaming recognition. | | [`IsResultDeduplicationEnabled`](#isresultdeduplicationenabled) | Determines whether the result deduplication feature is enabled for the specific result item type. | | [`SetDuplicateForgetTime`](#setduplicateforgettime) | Sets the duplicate forget time for the specific captured result item types. | | [`GetDuplicateForgetTime`](#getduplicateforgettime) | Gets the duplicate forget time for a specific captured result item type. | | [`SetMaxOverlappingFrames`](#setmaxoverlappingframes) | Sets the max referencing frames count for the to-the-latest overlapping feature. | | [`GetMaxOverlappingFrames`](#getmaxoverlappingframes) | Gets the max referencing frames count for the to-the-latest overlapping feature. | | [`EnableLatestOverlapping`](#enablelatestoverlapping) | Enables the to-the-latest overlapping feature. The output captured result will become a combination of the recent results if the latest frame is proved to be similar with the previous. | | [`IsLatestOverlappingEnabled`](#islatestoverlappingenabled) | Determines whether the to-the-latest overlapping feature is enabled for the specific result item type. | | [`SetResultCrossVerificationCriteria`](#setresultcrossverificationcriteria) | Sets the cross-verification criteria for specified result item types. | | [`GetResultCrossVerificationCriteria`](#getresultcrossverificationcriteria) | Gets the cross-verification criteria for a specified result item type. | ### MultiFrameResultCrossFilter Default constructor of a `MultiFrameResultCrossFilter` object. ```csharp MultiFrameResultCrossFilter() ``` ### EnableResultCrossVerification Enables result cross verification feature to improve the accuracy of video streaming recognition results. ```csharp void EnableResultCrossVerification(EnumCapturedResultItemType resultItemTypes, bool enabled) ``` **Parameters** `[in] resultItemTypes` The or value of the captured result item types. `[in] enabled` Set whether to enable result verification. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### IsResultCrossVerificationEnabled Determines whether the result cross verification feature is enabled for the specific captured result item type. ```csharp bool IsResultCrossVerificationEnabled(EnumCapturedResultItemType type) ``` **Parameters** `[in] type` The specific captured result item type. **Return Value** Returns a bool value indicating whether result verification is enabled for the specific captured result item type. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### EnableResultDeduplication Enables result deduplication feature to filter out the duplicate results in the period of `duplicateForgetTime` for video streaming recognition. The default value of `duplicateForgetTime` is 3000ms. - CRIT_BARCODE: When the text and format are identical, it is considered as the same barcode. - CRIT_TEXT_LINE: When the text is exactly the same, it is considered as the same text line. - CRIT_DETECTED_QUAD: When the quadrilateral is approximately the same, it is considered as the same quadrilateral. ```csharp void EnableResultDeduplication(EnumCapturedResultItemType resultItemTypes, bool enabled) ``` **Parameters** `[in] resultItemTypes` The or value of the captured result item types. `[in] enabled` Set whether to enable result result deduplication. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### IsResultDeduplicationEnabled Determines whether the result deduplication feature is enabled for the specific result item type. ```csharp bool IsResultDeduplicationEnabled(EnumCapturedResultItemType type) ``` **Parameters** `[in] type` The specific captured result item type. **Return Value** Returns a bool value indicating whether result deduplication is enabled for the specific result item type. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### SetDuplicateForgetTime Sets the duplicate forget time for the specific captured result item types. The same captured result item will be returned only once during the period. - CRIT_BARCODE: When the text and format are identical, it is considered as the same barcode. - CRIT_TEXT_LINE: When the text is exactly the same, it is considered as the same text line. - CRIT_DETECTED_QUAD: When the quadrilateral is approximately the same, it is considered as the same quadrilateral. ```csharp void SetDuplicateForgetTime(EnumCapturedResultItemType resultItemTypes, int time) ``` **Parameters** `[in] resultItemTypes` The or value of the captured result item types. `[in] time` The duplicate forget time measured in milliseconds. The value rang is [1, 180000]. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### GetDuplicateForgetTime Gets the duplicate forget time for a specific captured result item type. ```csharp int GetDuplicateForgetTime(EnumCapturedResultItemType type) ``` **Parameters** `[in] type` The specific captured result item type. **Return Value** Returns the duplicate forget time for the specific captured result item type. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### SetMaxOverlappingFrames Sets the max referencing frames count for the to-the-latest overlapping feature. ```csharp void SetMaxOverlappingFrames(EnumCapturedResultItemType resultItemTypes, int maxOverlappingFrames); ``` **Parameters** `[in] resultItemTypes` The or value of the captured result item types. `[in] maxOverlappingFrames` The max referencing frames count for the to-the-latest overlapping feature. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### GetMaxOverlappingFrames Gets the max referencing frames count for the to-the-latest overlapping feature. ```csharp int GetMaxOverlappingFrames(EnumCapturedResultItemType type) ``` **Parameters** `[in] type` The specific captured result item type. **Return value** Returns the max referencing frames count for the to-the-latest overlapping feature. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### EnableLatestOverlapping Enables the to-the-latest overlapping feature. The output captured result will become a combination of the recent results if the latest frame is proved to be similar with the previous. ```csharp void EnableLatestOverlapping(EnumCapturedResultItemType resultItemTypes, bool enabled); ``` **Parameters** `[in] resultItemTypes` The or value of the captured result item types. `[in] enabled` Sets whether to enable the to-the-latest overlapping feature. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### IsLatestOverlappingEnabled Determines whether the to-the-latest overlapping feature is enabled for the specific result item type. ```csharp bool IsLatestOverlappingEnabled(EnumCapturedResultItemType type) ``` **Parameters** `[in] type` The specific captured result item type. **Return value** Returns a bool value indicating whether the to-the-latest overlapping feature is enabled for the specific result item type. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) ### SetResultCrossVerificationCriteria Sets the cross-verification criteria for specified result item types. This method allows customization of the multi-frame verification parameters, controlling how many frames are analyzed and how many consistent results are required. ```csharp void SetResultCrossVerificationCriteria(EnumCapturedResultItemType resultItemTypes, int frameWindow, int minConsistentFrames) ``` **Parameters** `[in] resultItemTypes` A bitwise OR combination of one or more values from the `EnumCapturedResultItemType` enumeration. `[in] frameWindow` The number of frames to consider for cross-verification. `[in] minConsistentFrames` The minimum number of frames that must contain consistent results for verification to succeed. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) **Remarks** Introduced in Dynamsoft Barcode Reader SDK version 11.4.1000 and Dynamsoft Capture Vision version 3.4.1000. ### GetResultCrossVerificationCriteria Gets the cross-verification criteria for a specified result item type. ```csharp void GetResultCrossVerificationCriteria(EnumCapturedResultItemType resultItemType, out int frameWindow, out int minConsistentFrames) ``` **Parameters** `[in] resultItemType` The result item type to query. `[out] frameWindow` Returns the frame window size currently configured for this result type. `[out] minConsistentFrames` Returns the minimum consistent frames currently configured for this result type. **See Also** [EnumCapturedResultItemType](https://www.dynamsoft.com/capture-vision/docs/server/programming/dotnet/api-reference/core/enum-captured-result-item-type.md) **Remarks** Introduced in Dynamsoft Barcode Reader SDK version 11.4.1000 and Dynamsoft Capture Vision version 3.4.1000.