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1.92 kB
| # SPDX-License-Identifier: MIT | |
| # Copyright (C) Intel Corporation | |
| # | |
| # Vehicle Detection: OpenVINO Runtime sample. | |
| # See README.md for prerequisites and inputs. Run: python3 openvino_sample.py | |
| import cv2 | |
| import numpy as np | |
| import openvino as ov | |
| VEHICLE_CLASS_IDS = {2: "car", 3: "motorcycle", 5: "bus", 7: "truck"} | |
| CONF_THRESHOLD = 0.4 | |
| # Select the model: "yolo26n" (default) or "detr-resnet-50". | |
| MODEL = "yolo26n" | |
| INPUT_SIZE = 800 if MODEL.startswith("detr") else 640 | |
| core = ov.Core() | |
| model = core.read_model(f"{MODEL}_openvino_model/{MODEL}.xml") | |
| # Change device to "GPU" or "NPU" to run on integrated GPU or NPU. | |
| compiled = core.compile_model(model, "CPU") | |
| image = cv2.imread("test.jpg") | |
| h0, w0 = image.shape[:2] | |
| blob = cv2.resize(image, (INPUT_SIZE, INPUT_SIZE)) | |
| blob = cv2.cvtColor(blob, cv2.COLOR_BGR2RGB).astype(np.float32) / 255.0 | |
| blob = blob.transpose(2, 0, 1)[np.newaxis, ...] # NCHW | |
| # End-to-end output: [1, N, 6] = [x1, y1, x2, y2, confidence, class_id] | |
| # (N = 300 for YOLO26, 100 for DETR) | |
| output = compiled([blob])[compiled.output(0)][0] | |
| mask = (output[:, 4] >= CONF_THRESHOLD) & np.isin(output[:, 5].astype(int), list(VEHICLE_CLASS_IDS.keys())) | |
| dets = output[mask] | |
| sx, sy = w0 / INPUT_SIZE, h0 / INPUT_SIZE | |
| vehicle_count = len(dets) | |
| print(f"Detected vehicles: {vehicle_count}") | |
| colors = {"car": (0, 255, 0), "motorcycle": (255, 0, 0), | |
| "bus": (0, 165, 255), "truck": (0, 0, 255)} | |
| for det in dets: | |
| x1 = int(det[0] * sx) | |
| y1 = int(det[1] * sy) | |
| x2 = int(det[2] * sx) | |
| y2 = int(det[3] * sy) | |
| cid = int(det[5]) | |
| conf = float(det[4]) | |
| name = VEHICLE_CLASS_IDS[cid] | |
| label = f"{name} {conf:.2f}" | |
| color = colors[name] | |
| cv2.rectangle(image, (x1, y1), (x2, y2), color, 2) | |
| cv2.putText(image, label, (x1, y1 - 5), | |
| cv2.FONT_HERSHEY_SIMPLEX, 0.6, color, 2) | |
| print(f" {label} at ({x1},{y1})-({x2},{y2})") | |
| cv2.imwrite("output_openvino.jpg", image) | |