Tencent Cloud Vehicle License OCR

Problem

Vehicle license images often vary by front/back page, electronic version, tractor license, or copied/screenshot source. Manual extraction is error-prone, and review systems need signals for quality issues such as blur, glare, or incomplete borders.

How It Works

The skill wraps the Tencent Cloud OCR VehicleLicenseOCR API. A request can provide ImageBase64 or ImageUrl, and set CardSide to FRONT, BACK, or DOUBLE; tractor licenses can use TractorCardSide for front or back. It returns JSON fields such as plate number, vehicle type, owner, VIN, engine number, and registration date for the front; archive number, approved passenger count, total mass, curb weight, and external dimensions for the back. Electronic licenses also include status, inspection validity, and generation time.

Boundaries

• The image should be PNG/JPG/BMP; Base64 should stay under 7M; URL download should finish within 3 seconds.
• CardSide must match the actual card side, or the API may return FailedOperation.LicenseCardSideError.
• Alert codes can coexist, covering copies, screenshots, glare, blur, and incomplete borders.
• The account must have the service enabled and valid quota; non-license images, empty images, multiple cards, arrears, or exhausted packages produce errors.