【发布时间】:2021-12-18 17:20:00
【问题描述】:
我正在使用本教程制作颜色检测应用程序:https://itsourcecode.com/free-projects/python-projects/color-detection-using-python-with-source-code/。我一直遵循它,但每次尝试运行它时都会出错。错误是:main.py: error: the following arguments are required: -i/--image。我到处找,但似乎没有其他人有这个问题?我的完整代码是:
import cv2
import numpy as np
import pandas as pd
import argparse
# Creating argument parser to take image path from command line
ap = argparse.ArgumentParser()
ap.add_argument('-i', '--image', required=True, help="Image Path")
args = vars(ap.parse_args())
img_path = args['image']
# Reading the image with opencv
img = cv2.imread(img_path)
# declaring global variables (are used later on)
clicked = False
r = g = b = xpos = ypos = 0
# Reading csv file with pandas and giving names to each column
index = ["color", "color_name", "hex", "R", "G", "B"]
csv = pd.read_csv('colors.csv', names=index, header=None)
# function to calculate minimum distance from all colors and get the most matching color
def getColorName(R, G, B):
minimum = 10000
for i in range(len(csv)):
d = abs(R - int(csv.loc[i, "R"])) + abs(G - int(csv.loc[i, "G"])) + abs(B - int(csv.loc[i, "B"]))
if (d <= minimum):
minimum = d
cname = csv.loc[i, "color_name"]
return cname
# function to get x,y coordinates of mouse double click
def draw_function(event, x, y, flags, param):
if event == cv2.EVENT_LBUTTONDBLCLK:
global b, g, r, xpos, ypos, clicked
clicked = True
xpos = x
ypos = y
b, g, r = img[y, x]
b = int(b)
g = int(g)
r = int(r)
cv2.namedWindow('image')
cv2.setMouseCallback('image', draw_function)
while (1):
cv2.imshow("image", img)
if (clicked):
# cv2.rectangle(image, startpoint, endpoint, color, thickness)-1 fills entire rectangle
cv2.rectangle(img, (20, 20), (750, 60), (b, g, r), -1)
# Creating text string to display( Color name and RGB values )
text = getColorName(r, g, b) + ' R=' + str(r) + ' G=' + str(g) + ' B=' + str(b)
# cv2.putText(img,text,start,font(0-7),fontScale,color,thickness,lineType )
cv2.putText(img, text, (50, 50), 2, 0.8, (255, 255, 255), 2, cv2.LINE_AA)
# For very light colours we will display text in black colour
if (r + g + b >= 600):
cv2.putText(img, text, (50, 50), 2, 0.8, (0, 0, 0), 2, cv2.LINE_AA)
clicked = False
# Break the loop when user hits 'esc' key
if cv2.waitKey(20) & 0xFF == 27:
break
cv2.destroyAllWindows()
有什么帮助吗?
【问题讨论】:
-
你是如何在命令行中调用它的?如果使用 IDE,您在运行它时设置了哪些参数?没有其他人收到此特定错误的原因是 your 代码在第 8 行中说“-i/--image”参数是必需的:
ap.add_argument('-i', '--image', required=True, help="Image Path")可能重复:stackoverflow.com/questions/51678520/… -
您需要提供您要处理的图像的路径,标志为
--image。假设您的脚本名称是foo.py,那么您需要从 cmd 运行它:python foo.py --image <path-to-your-image> -
你知道提供命令行参数是什么意思吗,比如
--image path?我们经常看到这样的错误,因为人们试图从某个 IDE 运行脚本,例如spyder或在 jupyter notebook 中。从 shell 或命令行窗口运行脚本时,提供值是最直接的。
标签: python pandas numpy argparse cv2