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Add colorbar test script
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usr/examples/colorbar.py
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41
usr/examples/colorbar.py
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import sensor, time
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sensor.reset()
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sensor.set_brightness(0)
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sensor.set_saturation(0)
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sensor.set_gainceiling(8)
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sensor.set_contrast(2)
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# Set sensor pixel format
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sensor.set_framesize(sensor.QVGA)
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sensor.set_pixformat(sensor.RGB565)
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sensor.set_colorbar(True)
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# Skip a few frames to allow the sensor to be stable
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for i in range(0, 10):
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image = sensor.snapshot()
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#color bars thresholds
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t = [lambda r, g, b: r < 50 and g < 50 and b < 50, # Black
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lambda r, g, b: r < 50 and g < 50 and b > 200, # Blue
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lambda r, g, b: r > 200 and g < 50 and b < 50, # Red
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lambda r, g, b: r > 200 and g < 50 and b > 200, # Purple
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lambda r, g, b: r < 50 and g > 200 and b < 50, # Green
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lambda r, g, b: r < 50 and g > 200 and b > 200, # Aqua
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lambda r, g, b: r > 200 and g > 200 and b < 50, # Yellow
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lambda r, g, b: r > 200 and g > 200 and b > 200] # White
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#320x240 image with 8 color bars each one is approx 40 pixels.
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#we start from the center of the frame buffer, and average the
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#values of 10 sample pixels from the center of each color bar.
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for i in range(0, 8):
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avg = (0, 0, 0)
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idx = 40*i+20 #center of colorbars
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for off in range(0, 10): #avg 10 pixels
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rgb = image.get_pixel(idx+off, 120)
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avg = tuple(map(sum, zip(avg, rgb)))
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if not t[i](avg[0]/10, avg[1]/10, avg[2]/10):
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raise Exception("COLOR BARS TEST FAILED")
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print("\nCOLOR BARS TEST PASSED...")
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