如何解决Raspberry Pi AMG8833热像仪,如何打印检测到的最高温度?
我一直在关注本教程-https://www.instructables.com/Thermal-Camera-AMG833-Raspberry-Pi/
运行正常,如图所示。我可以在窗口中看到图形化的温度参考。
代码:
from Adafruit_AMG88xx import Adafruit_AMG88xx
import pygame
import os
import math
import time
import numpy as np
from scipy.interpolate import griddata
from colour import Color
#low range of the sensor (this will be blue on the screen)
MINTEMP = 26
#high range of the sensor (this will be red on the screen)
MAXTEMP = 32
#how many color values we can have
COLORDEPTH = 1024
os.putenv('SDL_FBDEV','/dev/fb1')
pygame.init()
#initialize the sensor
sensor = Adafruit_AMG88xx()
points = [(math.floor(ix / 8),(ix % 8)) for ix in range(0,64)]
grid_x,grid_y = np.mgrid[0:7:32j,0:7:32j]
#sensor is an 8x8 grid so lets do a square
height = 240
width = 240
#the list of colors we can choose from
blue = Color("indigo")
colors = list(blue.range_to(Color("red"),COLORDEPTH))
#create the array of colors
colors = [(int(c.red * 255),int(c.green * 255),int(c.blue * 255)) for c in colors]
displayPixelWidth = width / 30
displayPixelHeight = height / 30
lcd = pygame.display.set_mode((width,height))
lcd.fill((255,0))
pygame.display.update()
pygame.mouse.set_visible(False)
lcd.fill((0,0))
pygame.display.update()
#some utility functions
def constrain(val,min_val,max_val):
return min(max_val,max(min_val,val))
def map(x,in_min,in_max,out_min,out_max):
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min
#let the sensor initialize
time.sleep(.1)
while(1):
#read the pixels
pixels = sensor.readPixels()
pixels = [map(p,MINTEMP,MAXTEMP,COLORDEPTH - 1) for p in pixels]
#perdorm interpolation
bicubic = griddata(points,pixels,(grid_x,grid_y),method='cubic')
#draw everything
for ix,row in enumerate(bicubic):
for jx,pixel in enumerate(row):
pygame.draw.rect(lcd,colors[constrain(int(pixel),COLORDEPTH- 1)],(displayPixelHeight * ix,displayPixelWidth * jx,displayPixelHeight,displayPixelWidth))
pygame.display.update()
https://github.com/adafruit/Adafruit_AMG88xx_python/blob/master/examples/thermal_cam.py
但是如何将最高的测得温度打印到控制台上,以便以后可以使用该值?
谢谢
解决方法
要获得每一帧的最大值,只需在print(max(pixels))
之后添加pixels = sensor.readPixels()
即可。
这应该足够快,以至于不会对脚本的其余部分造成任何明显的影响。
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