例程讲解10-Color-Tracking->single_color_grayscale_blob_tracking单色灰度色块跟踪

视频教程4 - 颜色识别:https://singtown.com/learn/49993/
# 单色灰度色块跟踪示例
#
# 这个例子展示了使用OpenMV Cam的单色灰度跟踪。

import sensor, image, time

# Color Tracking Thresholds (Grayscale Min, Grayscale Max)
# 下面的灰度阈值设置为只能找到非常明亮的白色区域。
thresholds = (245, 255)

sensor.reset()
sensor.set_pixformat(sensor.GRAYSCALE)
sensor.set_framesize(sensor.VGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
clock = time.clock()

# 只有比“pixel_threshold”多的像素和多于“area_threshold”的区域才被
# 下面的“find_blobs”返回。 如果更改相机分辨率,
# 请更改“pixels_threshold”和“area_threshold”。 “merge = True”合并图像中所有重叠的色块。

while(True):
    clock.tick()
    img = sensor.snapshot()
    for blob in img.find_blobs([thresholds], pixels_threshold=100, area_threshold=100, merge=True):
        img.draw_rectangle(blob.rect())
        img.draw_cross(blob.cx(), blob.cy())
    print(clock.fps())

星瞳科技OpenMV官方中文文档函数讲解:

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