openmv/tools/pyopenmv_fb.py
iabdalkader 844329a886 tools/pyopenmv: Use a separate clock for FPS and loop.
Lowers CPU usage while getting accurate FPS.
2024-08-03 15:38:06 +03:00

122 lines
3.4 KiB
Python
Executable File

#!/usr/bin/env python2
# This file is part of the OpenMV project.
#
# Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
# Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
#
# This work is licensed under the MIT license, see the file LICENSE for details.
#
# An example script using pyopenmv to grab the framebuffer.
import sys
import numpy as np
import pygame
import pyopenmv
from time import sleep
script = """
# Hello World Example
#
# Welcome to the OpenMV IDE! Click on the green run arrow button below to run the script!
import sensor, image, time
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.skip_frames(time = 2000) # Wait for settings take effect.
clock = time.clock() # Create a clock object to track the FPS.
while(True):
clock.tick()
img = sensor.snapshot() # Take a picture and return the image.
sensor.flush()
print(clock.fps(), " FPS")
"""
# init pygame
pygame.init()
if len(sys.argv)!= 2:
print ('usage: pyopenmv_fb.py <serial port>')
sys.exit(1)
connected = False
portname = sys.argv[1]
pyopenmv.disconnect()
for i in range(10):
try:
# opens CDC port.
# Set small timeout when connecting
pyopenmv.init(portname, baudrate=921600, timeout=0.050)
connected = True
break
except Exception as e:
connected = False
sleep(0.100)
if not connected:
print("Failed to connect to OpenMV's serial port.\n"
"Please install OpenMV's udev rules first:\n"
"sudo cp openmv/udev/50-openmv.rules /etc/udev/rules.d/\n"
"sudo udevadm control --reload-rules\n\n")
sys.exit(1)
# Set higher timeout after connecting for lengthy transfers.
pyopenmv.set_timeout(1*2) # SD Cards can cause big hicups.
pyopenmv.stop_script()
pyopenmv.enable_fb(True)
pyopenmv.exec_script(script)
# init screen
running = True
screen = None
IMAGE_SCALE = 4
clock = pygame.time.Clock()
fps_clock = pygame.time.Clock()
font = pygame.font.SysFont("monospace", 50)
try:
while running:
# Read state
w, h, data, size, text = pyopenmv.read_state()
if text is not None:
print(text, end="")
if data is not None:
fps = fps_clock.get_fps()
# Create image from RGB888
image = pygame.image.frombuffer(data.flat[0:], (w, h), 'RGB')
image = pygame.transform.scale(image, (w * IMAGE_SCALE, h * IMAGE_SCALE))
if screen is None:
screen = pygame.display.set_mode((w * IMAGE_SCALE, h * IMAGE_SCALE), pygame.DOUBLEBUF, 32)
# blit stuff
screen.blit(image, (0, 0))
screen.blit(font.render("%.2f FPS %.2f MB/s"%(fps, fps * size / 1024**2), 5, (255, 0, 0)), (0, 0))
# update display
pygame.display.flip()
fps_clock.tick(250)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
running = False
if event.key == pygame.K_c:
pygame.image.save(image, "capture.png")
clock.tick(250)
except KeyboardInterrupt:
pass
pygame.quit()
pyopenmv.stop_script()