# This work is licensed under the MIT license. # Copyright (c) 2013-2024 OpenMV LLC. All rights reserved. # https://github.com/openmv/openmv/blob/master/LICENSE # # TensorFlow Lite Mobilenet V1 Example # # Google's Mobilenet V1 detects 1000 classes of objects # # WARNING: Mobilenet is trained on ImageNet and isn't meant to classify anything # in the real world. It's just designed to score well on the ImageNet dataset. # This example just shows off running mobilenet on the OpenMV Cam. However, the # default model is not really usable for anything. You have to use transfer # learning to apply the model to a target problem by re-training the model. # # NOTE: This example only works on the OpenMV Cam H7 Plus (that has SDRAM) and better! # To get the models please see the CNN Network library in OpenMV IDE under # Tools -> Machine Vision. The labels are there too. # You should insert a microSD card into your camera and copy-paste the mobilenet_labels.txt # file and your chosen model into the root folder for this script to work. import sensor import time import tf sensor.reset() # Reset and initialize the sensor. sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE) sensor.set_framesize(sensor.QVGA) # Set frame size to QVGA (320x240) sensor.set_windowing((240, 240)) # Set 240x240 window. sensor.skip_frames(time=2000) # Let the camera adjust. mobilenet_version = "1" # 1 mobilenet_width = "0.5" # 1.0, 0.75, 0.50, 0.25 mobilenet_resolution = "128" # 224, 192, 160, 128 mobilenet = "mobilenet_v%s_%s_%s_quant.tflite" % ( mobilenet_version, mobilenet_width, mobilenet_resolution, ) net = tf.Model(mobilenet, load_to_fb=True) labels = [line.rstrip("\n") for line in open("mobilenet_labels.txt")] clock = time.clock() while True: clock.tick() img = sensor.snapshot() print("**********\nTop 5 Detections") # This combines the labels and confidence values into a list of tuples # and then sorts that list by the confidence values. sorted_list = sorted( zip(labels, net.predict(img)), key=lambda x: x[1], reverse=True ) for i in range(5): print("%s = %f" % (sorted_list[i][0], sorted_list[i][1])) print(clock.fps(), "fps")