Tesseract Quality Checker API

• Project Mentor
  1. Dr Uthayasanker Thayasivam
• Contributors
  1. Sabesan Sathananthan
  2. Sivaram Rasathurai
  3. Thineshan Panchalingam

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Summary

This API is used to check the quality of the captured image for tesseract OCR. Tesseract OCR works best when there is a clear segmentation of the foreground text from the background. It is easy to instruct the user get a best-fit image rather than doing preprocessing on the images.

Description

Constraints for the best-fit images

• Appropriate width and height with DPI > 300 (For Driving License Appropriate width is 1000px and the height is 700px. )
• No Blur
• No Glare
• No shadow

API Features

• Resolution detection
• Blur detection
• Glare detection
• Shadow/ Uneven illumination detection
• Skew detection

Quality Checker API Error Responses

Status	Error Code	Error Messaging	Additional Info
400	10000	DL is not detected	Could not find driving license/NIC in uploaded image
400	10001	Skew detected	Take the image without skew
400	10002	Resolution is not enough	Atleast 1000px, 700px image is needed with 300 DPI
400	10003	Blur detected	Check whether your image is properly focussed and keep your hands steady while capturing.
400	10004	Glare detected	Try to avoid direct light (flash)
400	10005	Illumination(shadow) detected	Need a good lighting environment. Take the image towards the light rather than away from the light.

License

Apache License 2.0

Code of Conduct

Please read our code of conduct document here.