36 lines
1.2 KiB
Python
36 lines
1.2 KiB
Python
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import sensor, lcd, time
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lcd.init(freq=15000000) # 初始化LCD
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sensor.reset() # 复位和初始化摄像头
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sensor.set_vflip(1) # 将摄像头设置成后置方式（所见即所得）
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sensor.set_pixformat(sensor.RGB565) # 设置像素格式为彩色 RGB565
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sensor.set_framesize(sensor.QVGA) # 设置帧大小为 QVGA (320x240)
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sensor.set_auto_gain(False)
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sensor.set_auto_whitebal(False)
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sensor.set_auto_gain(0,0)
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sensor.skip_frames(time = 200) # 等待设置生效
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# 阈值设置
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thresholds = [(35, 100, 6, 127, 0, 127), # 红色阈值
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(25, 100, -6, 127, 5, 43), # 黄色阈值
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(87, 100, -59, 127, -10, 127)] # 绿色阈值
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# while True:
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img = sensor.snapshot()
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max_blobs = []
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for threshold in thresholds:
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# 查找每种颜色的色块
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blobs = img.find_blobs([threshold], pixels_threshold=200, area_threshold=200, merge=True)
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if blobs:
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# 找到最大的色块
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max_blob = max(blobs, key=lambda b: b.pixels())
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max_blobs.append(max_blob)
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# 绘制每种颜色最大色块的矩形和中心十字
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for b in max_blobs:
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img.draw_rectangle(b[0:4])
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img.draw_cross(b[5], b[6])
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lcd.display(img)
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