cv.py

#!/usr/bin/python3
#
# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
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from max7219 import max
import sys
from time import strftime
import jetson.utils
import jetson.inference
import sevenSeg
import database
VEHICLES = {3: "car", 8: "truck", }


# Record to MP4
RECORD = False


# Testing with small 7seg
TEST = True
if TEST:
    miniseg = max()


# initialize camera and NN settings
videoIn = "csi://0"
videoInArgs = ["--input-flip=rotate-180"]
date = strftime("%m%d-%H%M%S")
if RECORD:
    videoOut = f"./video/video-{date}.mp4"
else:
    videoOut = ""
neuralnet = "ssd-mobilenet-v2"
overlay = "box,labels,conf"
threshold = 0.5


# init database
db = database.Database()
GARAGE = "Schrank"
count = db.getCurrentCount(GARAGE)

# init 7seg
seg = sevenSeg.sevenseg()
if TEST:
    miniseg.write(count)
else:
    seg.updateDisplay(count)
print(f'currently {count} cars in garage, updating display')

# load the object detection network
net = jetson.inference.detectNet(neuralnet, threshold=threshold)

# create video sources & outputs
input = jetson.utils.videoSource(videoIn, videoInArgs)
output = jetson.utils.videoOutput(videoOut)

# process frames until the user exits
while True:

    if TEST:
        miniseg.write(count)
    else:
        seg.updateDisplay(count)

    # capture the next image
    img = input.Capture()

    # detect objects in the image (with overlay)
    detections = net.Detect(img, overlay=overlay)

    # print the detections
    print("detected {:d} objects in image".format(len(detections)))

    for detection in detections:
        print(detection)
        if detection.ClassID in VEHICLES.keys():
            count = db.updateDatabase(GARAGE)
            if TEST:
                miniseg.write(count)
            else:
                seg.updateDisplay(count)
            print(
                f'{VEHICLES[detection.ClassID]} detected, count is now {count}')
    # render the image
    output.Render(img)

    # update the title bar
    output.SetStatus("{:s} | Network {:.0f} FPS".format(
        neuralnet, net.GetNetworkFPS()))

    # print out performance info
    net.PrintProfilerTimes()

    # exit on input/output EOS
    if not input.IsStreaming() or not output.IsStreaming():
        break