# 众数滤波

## Code

# Mode Filter Example
#
# This example shows off mode filtering. Mode filtering is a highly non-linear
# operation which replaces each pixel with the mode of the NxN neighborhood
# of pixels around it. Avoid using the mode filter on RGB565 images. It will
# cause artifacts on image edges...

import sensor, image, time

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.GRAYSCALE) # or sensor.RGB565
sensor.set_framesize(sensor.QQVGA) # or sensor.QVGA (or others)
sensor.skip_frames(time = 2000) # Let new settings take affect.
clock = time.clock() # Tracks FPS.

while(True):
clock.tick() # Track elapsed milliseconds between snapshots().
img = sensor.snapshot() # Take a picture and return the image.

# The only argument to the median filter is the kernel size, it can be
# either 0, 1, or 2 for a 1x1, 3x3, or 5x5 kernel respectively.
img.mode(1)

print(clock.fps()) # Note: Your OpenMV Cam runs about half as fast while
# connected to your computer. The FPS should increase once disconnected.