cv/plate_detection/plate_detection.py

from ultralytics import YOLO
import cv2
import easyocr

# Load a model
model = YOLO('license_plate_detector.pt')  # load an official model

# Open the input video
cap = cv2.VideoCapture('trafik.mp4')

reader = easyocr.Reader(['ch_sim','en']) # this needs to run only once to load the model into memory

bad_boys = ['GXISOGJ','GXIS OGJ', 'GXI5OGJ', 'GXI5 OGJ', 'EYGINBG']

if not cap.isOpened():
    raise Exception("Error: Could not open video.")


while cap.isOpened():
    # Read a frame from the input video
    success, frame = cap.read()

    if success:
        results = model.predict(source=frame, conf=0.30, verbose=False)

        for result in results:
            box = result.boxes.xyxy.cpu().numpy().astype(int)
            if (len(box) > 0 ) :
                x1 = box[0][0]
                y1 = box[0][1]
                x2 = box[0][2]
                y2 = box[0][3]

                new_img = frame[y1:y2, x1:x2]
                #new_img = cv2.cvtColor(new_img, cv2.COLOR_BGR2GRAY)
                #new_img = cv2.convertScaleAbs(new_img, alpha=1.5, beta=30.0)

                result = reader.readtext(new_img)

                plate_text = ''
                for (bbox, text, prob) in result:
                    plate_text += text
                print (plate_text)

                if plate_text in bad_boys:
                    color = (0, 0, 255)
                    frame = cv2.putText(frame, 'BAD BOY', (x1, y1-50), cv2.FONT_HERSHEY_SIMPLEX, 3.0, color, 10)
                else:
                    color = (0, 255, 0)

                frame = cv2.rectangle(frame, (x1, y1), (x2, y2), color, 4)
                frame = cv2.putText(frame, plate_text, (x1, y1-3), cv2.FONT_HERSHEY_SIMPLEX, 1.5, color, 3)

                #cv2.imshow("Plate", new_img)

        frame = cv2.resize(frame, (0, 0), fx = 0.3, fy = 0.3)
        cv2.imshow("License plate detector", frame)
        key = cv2.waitKey(1)
        if key & 0xff == ord('q'):
            break

cap.release()
cv2.destroyAllWindows()