216 lines
7.9 KiB
Python
216 lines
7.9 KiB
Python
import cv2
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import tkinter as tk
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from tkinter import Canvas
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from PIL import Image, ImageTk
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import threading
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import numpy as np
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from config import config_manager
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class PreviewWindow:
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"""采集卡预览窗口"""
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def __init__(self):
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self.config = config_manager.config
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self.caps = {}
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self.frames = {}
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self.large_window = None
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self.running = True
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def init_cameras(self):
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"""初始化所有相机"""
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for i, group in enumerate(self.config['groups']):
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if group.get('active', True): # 只加载活动的配置
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try:
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cap = cv2.VideoCapture(group['camera_index'], cv2.CAP_DSHOW)
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if cap.isOpened():
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cap.set(cv2.CAP_PROP_FRAME_WIDTH, group['camera_width'])
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cap.set(cv2.CAP_PROP_FRAME_HEIGHT, group['camera_height'])
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self.caps[i] = {
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'cap': cap,
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'group': group,
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'name': group['name']
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}
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except Exception as e:
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print(f"无法打开相机 {group['camera_index']}: {e}")
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def capture_frames(self):
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"""捕获帧"""
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while self.running:
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for idx, data in self.caps.items():
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ret, frame = data['cap'].read()
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if ret:
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# 裁剪到配置的区域
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height, width = frame.shape[:2]
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crop_top = 30
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crop_bottom = min(crop_top + 720, height)
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crop_width = min(1280, width)
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frame = frame[crop_top:crop_bottom, 0:crop_width]
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# 转换颜色空间
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frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
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self.frames[idx] = frame_rgb
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def create_grid_window(self):
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"""创建网格窗口"""
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root = tk.Tk()
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root.title("采集卡预览 - 点击放大")
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root.geometry("1000x700")
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# 获取显示配置
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display = self.config.get('display', {})
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preview_width = display.get('preview_width', 640)
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preview_height = display.get('preview_height', 360)
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columns = display.get('preview_columns', 2)
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rows = display.get('preview_rows', 2)
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canvas = Canvas(root, bg='black')
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canvas.pack(fill=tk.BOTH, expand=True)
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# 存储图像对象
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self.photo_objects = {}
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def update_frames_once():
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"""在主线程中更新一帧（使用after循环）"""
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if not self.running:
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return
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try:
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canvas.delete("all")
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# 计算每个预览窗口的位置和大小
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window_width = root.winfo_width() if root.winfo_width() > 1 else 1000
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window_height = root.winfo_height() if root.winfo_height() > 1 else 700
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cell_width = window_width // columns
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cell_height = window_height // rows
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frame_idx = 0
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for idx in self.caps.keys():
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if idx in self.frames:
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row = frame_idx // columns
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col = frame_idx % columns
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x = col * cell_width
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y = row * cell_height
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# 调整图像大小
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frame = self.frames[idx]
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h, w = frame.shape[:2]
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scale = min(cell_width / w, cell_height / h) * 0.9
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new_w = int(w * scale)
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new_h = int(h * scale)
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resized_frame = cv2.resize(frame, (new_w, new_h))
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# 转换为PIL图像
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pil_image = Image.fromarray(resized_frame)
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photo = ImageTk.PhotoImage(image=pil_image)
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# 保持引用，避免被GC
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self.photo_objects[idx] = photo
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# 绘制图像
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center_x = x + cell_width // 2
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center_y = y + cell_height // 2
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canvas.create_image(center_x, center_y, image=photo, anchor='center')
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# 绘制标签
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name = self.caps[idx]['name']
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canvas.create_text(center_x, y + 20, text=name, fill='white', font=('Arial', 12, 'bold'))
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frame_idx += 1
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except Exception as e:
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print(f"更新帧错误: {e}")
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# 约30fps
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root.after(33, update_frames_once)
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def on_canvas_click(event):
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"""点击画布事件"""
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window_width = root.winfo_width()
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window_height = root.winfo_height()
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cell_width = window_width // columns
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cell_height = window_height // rows
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col = int(event.x // cell_width)
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row = int(event.y // cell_height)
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index = row * columns + col
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# 找到对应的配置
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if index < len(self.caps):
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idx = list(self.caps.keys())[index]
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self.show_large_window(idx)
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canvas.bind('<Button-1>', on_canvas_click)
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# 使用after在主线程中循环刷新
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root.after(33, update_frames_once)
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def on_closing():
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"""关闭窗口"""
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self.running = False
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for data in self.caps.values():
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data['cap'].release()
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root.destroy()
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root.protocol("WM_DELETE_WINDOW", on_closing)
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root.mainloop()
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def show_large_window(self, idx):
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"""显示大窗口"""
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if self.large_window is not None and self.large_window.winfo_exists():
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self.large_window.destroy()
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self.large_window = tk.Toplevel()
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self.large_window.title(f"放大视图 - {self.caps[idx]['name']}")
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self.large_window.geometry("1280x720")
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canvas = Canvas(self.large_window, bg='black')
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canvas.pack(fill=tk.BOTH, expand=True)
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photo_obj = {}
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def update_large_once():
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if not self.running or not self.large_window.winfo_exists():
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return
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try:
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if idx in self.frames:
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canvas.delete("all")
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frame = self.frames[idx]
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h, w = frame.shape[:2]
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# 调整到窗口大小
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window_width = self.large_window.winfo_width() if self.large_window.winfo_width() > 1 else 1280
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window_height = self.large_window.winfo_height() if self.large_window.winfo_height() > 1 else 720
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scale = min(window_width / w, window_height / h)
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new_w = int(w * scale)
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new_h = int(h * scale)
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resized_frame = cv2.resize(frame, (new_w, new_h))
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pil_image = Image.fromarray(resized_frame)
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photo = ImageTk.PhotoImage(image=pil_image)
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photo_obj['img'] = photo
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canvas.create_image(window_width // 2, window_height // 2, image=photo, anchor='center')
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except Exception as e:
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print(f"更新大窗口错误: {e}")
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self.large_window.after(33, update_large_once)
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self.large_window.after(33, update_large_once)
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def run(self):
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"""运行预览"""
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self.init_cameras()
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# 启动捕获线程
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capture_thread = threading.Thread(target=self.capture_frames, daemon=True)
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capture_thread.start()
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# 创建并显示网格窗口
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import time
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time.sleep(0.5) # 等待几帧
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self.create_grid_window()
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if __name__ == "__main__":
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preview = PreviewWindow()
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preview.run()
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