app.py

import gradio as gr
import torch
from torchvision import transforms
from PIL import Image
import torch.nn.functional as F
from ultralytics import YOLO
import cv2
import numpy as np

# 加载模型
model = YOLO("nabird_det_ep3.pt")

def detect_objects(image: Image.Image):

    image_np = np.array(image)
    image_np = cv2.cvtColor(image_np, cv2.COLOR_RGB2BGR)  # 转为 BGR 格式供 OpenCV 使用

    results = model.predict(image_np, save=False)
    
    for result in results:
        for box in result.boxes:
            # 提取 bbox 和类别信息
            xyxy = box.xyxy[0].tolist()  # [x1, y1, x2, y2]
            conf = box.conf[0].item()   # 置信度
            cls = int(box.cls[0].item())  # 类别索引
            class_name = model.names[cls]  # 获取类别名称

            # 转换坐标为整数
            x1, y1, x2, y2 = map(int, xyxy)

            # 绘制矩形框
            cv2.rectangle(image_np, (x1, y1), (x2, y2), color=(0, 255, 0), thickness=2)

            # 绘制类别名称和置信度
            label = f"{class_name} {conf:.2f}"
            cv2.putText(image_np, label, (x1, y1 - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 255, 0), 2)

    # 转回 RGB 格式并返回 PIL Image
    image_with_boxes = cv2.cvtColor(image_np, cv2.COLOR_BGR2RGB)
    return Image.fromarray(image_with_boxes)

example_image_paths = ["PC060715.jpg", "PC061030.jpg", "PC060806.jpg"]  # 替换为你的图片路径


app = gr.Interface(
    fn=detect_objects,  # 检测函数
    inputs=gr.Image(type="pil"),  # 接收输入图片，返回 PIL 格式
    outputs=gr.Image(type="pil"),  # 返回叠框后的图片
    examples=example_image_paths,
    title="YOLO Object Detection",
    description="Upload an image to detect objects using YOLO."
)

app.launch()