Extract the car number from the image Version 3 (python)

Action group: Robin OCR

Description

The action allows you to extract the car number from the image

Action icon

Parameters and their settings

PropertyDescriptionTypeFilling exampleMandatory field
Parameters
ContextAction context for working with Robin OCR 2.Robin.OCR2
Yes
File pathThe path to the file from which you want to extract the car number. The image must contain the machine number, otherwise the extracted data may be incorrect. Supported image formats: jpg, jpeg, bmp, dib, rle, jpe, jfif, tif, tiff, png.Robin.FilePath
Yes
Page numberThe page number of the file to extract data from. Numbering starts from 1. If the field is not filled in, the data will be extracted from the first page.Robin.Numeric
No
Folder pathThe path to the folder where the recognized image with the superimposed blocks into which the action divided the data will be saved. To save the file, you also need to fill in the «File name» field.Robin.FolderPathC:\doc\imgNo
File nameThe name of the image file with superimposed blocks (without extension). By default, a file with the extension *.png is created. To save the file, you also need to fill in the «Folder path» field.Robin.String
No
OverwriteIf the value is «true» and an image file with the same name and extension exists in the specified folder, then the new file will overwrite it. If «false», the file will not be overwritten and the action will return an error.Robin.BooleantrueNo
Results
The car numberThe car number extracted from the original image.Robin.String

Image pathThe path to the image file with superimposed blocks.Robin.FilePath

Recognition confidenceImage recognition accuracy in the range from 0 to 1.Robin.Numeric

Special conditions of use

  • If an image without license plates or with several license plates is input, the text data from the image may be recognized incorrectly or not recognized at all. Therefore, it is recommended to use the action only for recognizing one license plate number;
  • acceptable image formats: jpg, jpeg, bmp, dib, rle, jpe, jfif, gif, tif, tiff, png; 
  • if the action does not find or recognize the number, the robot will terminate without error;
  • if an invalid file page number is specified, the robot will terminate with an error;
  • if the "Folder path" field is filled in and the "File name" field is not filled in, the robot will terminate with an error;
  • if the "File name" field is filled in and the "Folder path" field is not filled in, the robot will terminate with an error;
  • if the "Folder path" parameter specifies a folder where there is already a file with the specified name and the "Overwrite" parameter = false, the robot will terminate with an error;
  • if "Folder path" and "File name" parameters are not filled in, the file with superimposed blocks will not be saved;
  • if parameters "File name" and "File path" are filled in, the image with blocks will be saved in the specified folder with the specified name in .png format.

Example of use

Task

You need to extract the license plate number from the image 

Solution

Use the action "Create context with Robin OCR 2", "Extract the car number from the image".

Implementation

  1. Assemble a robot scheme consisting of actions:
  2. Fill in the "Create context with Robin OCR 2" parameters according to the customization standards for this action.
  3. Set the parameters for the "Extract the car number from the image" action. To fill the context, click on , then click on and select the context of the action "Create context with Robin OCR 2 1" from the dropdown list.
  4. Click on the "Start" button in the top panel.

Result

The program robot completed successfully.
Image with blocks:


Additional attachments

https://confluence.itbs.it.ru/x/9437Eg

Instructions for local connection

  1. Click "Start."
  2. Select "Settings".
  3. Select "System".
  4. Select "About".

  5. Select "Advanced system settings".

  6. In the window that opens, select "Environment variables".
  7. Click "Create".

  8. Enter:

    Name - ROBIN_PY_OCRENGINE_PATH

    Value - http://10.68.10.31:8080/api/v1/ocr/gettext/abt

    and click "ОК".

  9. Restart the computer.

  10. Connect to the vpn.

  11. You can start the robot. 

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