Documentation for Auto Intellect 5.6. Documentation for other versions of Intellect is available too.

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The settings panel of the VIT module object contains the following interface elements:

Find the description of the VIT module parameters in the table below.

№ 

Parameter name

Parameter setting method

Description

Data type

Default value

Value range

1

The Zooming checkbox

Set the checkbox

Reduce the frame size while recognizing depending on the Zone width parameter value.

Boolean type

No

Yes – the frame size is reducing while recognizing.

No – the frame size is not reducing while recognizing.

2The Number of streams for frame processing fieldSpecify value in the fieldSet maximum recognition streamsNonnegative integer00-255
3The Fine tuning of SDK buttonClick the buttonGo to Fine tuning of SDK (see the table below)---

 

Important!

Fine tuning of SDK is to be performed only with the help of AxxonSoft specialists!

It is not recommended to change the values of parameters that are not given in this table.

ParameterDescription

VodiCTL_VPW_PLATE_RATIO_TYPE

This parameter sets info on how height reduced or enlarged the incoming image is. 3 options are possible:

  1. No distortions
  2. Automatically depending on the image size
  3. User value

VodiCTL_VPW_IMAGE_THRESHOLD

Base level of image thresholding. By default — 21.

VodiCTL_VPW_IMAGE_BLUR

The parameter for internal use. The recommended value to set is 13.

VodiCTL_VPW_ PLATE_EXTRA_ANGLE_ANALYSE

Enable/disable the angle analysis algorithm of the license plate image.

VodiCTL_VPW_ PLATE_EXTRA_RANGES_ANALYSEEnable/disable the algorithm of a thorough search for license plate candidates.

VodiCTL_VPW_PLATE_STAR_MAX

Maximum unrecognized symbols on the license plate, at which the result will still be considered the result of the recognition of the license plate.

VodiCTL_VPW_PLATE_PROBABILITY_MIN

Minimum percentage of similarity between the recognition result and the corresponding license plate pattern at which this result can be considered the result of the recognition of the license plate. Using this parameter, the results obtained are filtered according to the authenticity.

VodiCTL_VPW_PLATE_FILTER_ROFACTOR

The license plate filter coefficient by the so-called image density - ratio of white pixels to total pixels (first strategy). The type is unsigned. This coefficient is used for image thresholding and has the optimal values, which are determined by AutoSDK developers using their own test samples. The parameter is considered as a service one, and its value should be set according to the recommendations of technical support specialists.

VodiCTL_VPW_PLATE_FILTER_RODROPFACTOR

The license plate filter coefficient by the so-called image density - ratio of white pixels to total pixels (second strategy). The type is unsigned. This coefficient is used for image thresholding and has the optimal values, which are determined by AutoSDK developers using their own test samples. The parameter is considered as a service one, and its value should be set according to the recommendations of technical support specialists.

VodiCTL_VPW_PLATE_FILTER_SYMCOUNT

Enable/disable the simple license plates filter algorithm by the minimum number of recognized symbols on them. If the algorithm is enabled (the value of the parameter is greater than 0), the base search for symbols on the prospective license plate (geometry, proportions) is performed. If less symbols are recognized on the prospective license plate than specified in this parameter, this prospective license plate is not considered a license plate. That is, the value of this parameter is the minimum characters that must be present on the prospective license plate when the basic algorithm is in use.

VodiCTL_VPW_LOG_SETTINGS

Enable/disable logging of all recognition parameters.

VodiCTL_VPW_PLATE_PRECISE_ANALYSE

Enable/disable precise image analysis. It increases the quality of recognition under adverse conditions (for example, if the characteristics/settings of the camera do not fully meet the requirements or in bad weather). It increases the processing time of the frame by 20-30%, depending on its size. Under normal conditions, this parameter does not affect the quality of recognition.

VodiCTL_VPW_DYNAMIC_ENABLE

Enable/disable the number recognition dynamics (by default, the dynamics is enabled).

If the value is True, then tracking is enabled, and the number is recognized by the set of frames. If the value is False, then tracking is disabled, and the number is recognized by each frame separately without taking to account the previous ones, and the quality can vary from 0 to 100%.

VodiCTL_VPW_DYNAMIC_OUTPUT_FRAMECOUNT

Number of frames required to display a license plate. The default value is 0. This is necessary, but not sufficient, for the first output of the result. This condition delays displaying from the first moment of recognition of the license plate in dynamics. The setting is designed to improve authenticity of the results, as well as to hide possible false triggerings.

VodiCTL_VPW_DYNAMIC_WITH_DUPLICATE

Enable/disable the periodic output of license plate recognition results.

VodiCTL_VPW_DYNAMIC_OUTPUT_TIMEOUT

The minimum time required to monitor the license plate (in microseconds) before displaying the recognition result to the user. This parameter can only be used when the “Dynamic” mode is on. In this mode, the trajectory of the vehicle is monitored, and the user does not immediately receive the recognition result of the license plate, but after the time specified for this setting. In this case, the first recognition result will be replaced by the result of higher quality and subsequently displayed to the user. If parameter 0 is set for this value, the user gets the first result of recognizing the detected license plate.  After the time specified in this parameter expires, the monitoring of the trajectory of the license plate continues until it disappears from the frame.

VodiCTL_VPW_DYNAMIC_OUTPUT_PERIOD

Time period (in microseconds) over which the recognition result is to be displayed to the user. This parameter can be used only if the VodiCTL_VPW_DYNAMIC_WITH_DUPLICATE parameter is set.

VodiCTL_VPW_DYNAMIC_DURATION_WITHOUT_ACCESS

Maximum permissible absence time of the license plate in the monitoring zone (in microseconds). After this time, the license plate is considered to be lost and is displayed to the user with the set checkbox.

VodiF_RESULT_LOST.