# Edge Detection Example: # # This example demonstrates using the morph function on an image to do edge # detection and then thresholding and filtering that image afterwards. import sensor, image kernel_size = 1 # kernel width = (size*2)+1, kernel height = (size*2)+1 kernel = [-1, -1, -1,\ -1, +8, -1,\ -1, -1, -1] # This is a high pass filter kernel. ee here for more kernels: # http://www.fmwconcepts.com/imagemagick/digital_image_filtering.pdf thresholds = [(100, 255)] # grayscale thresholds sensor.reset() sensor.set_framesize(sensor.QQVGA) # smaller resolution to go faster sensor.set_pixformat(sensor.GRAYSCALE) while(True): img = sensor.snapshot() img.morph(kernel_size, kernel) img.binary(thresholds) img.erode(1, threshold = 2) # erode pixels with less than 2 neighbors