问题描述
我将 Python 和 OpenCV 用于某些视觉应用程序.我需要将鼠标位置保存在变量中,但我不知道如何.我可以获取当前鼠标位置在窗口中打印,但不能将其保存到变量中.
I'm using Python and OpenCV for some vision application.I need to save mouse position in variables and I don't know how.I can get the current mouse position to print in window, but can't save it to variable.
我的问题与这个类似,只是我在 python 中工作:OpenCV 从鼠标回调函数返回值
My problem is similar to this one only I work in python:OpenCV Return value from mouse callback function
我这样定义我的函数(用于打印鼠标位置):
I define my function like this (for printing mouse position):
def mousePosition(event,x,y,flags,param):
if event == cv2.EVENT_MOUSEMOVE:
print x,y
我在我的程序中这样使用它:
I use it in my program like this:
cv2.setMouseCallback('Drawing spline',mousePosition)
推荐答案
下面是一个小的修改版本的代码: http://docs.opencv.org/trunk/doc/py_tutorials/py_gui/py_mouse_handling/py_mouse_handling.html#mouse-handling
Below is a small modified version of code from : http://docs.opencv.org/trunk/doc/py_tutorials/py_gui/py_mouse_handling/py_mouse_handling.html#mouse-handling
import cv2
import numpy as np
ix,iy = -1,-1
# mouse callback function
def draw_circle(event,x,y,flags,param):
global ix,iy
if event == cv2.EVENT_LBUTTONDBLCLK:
cv2.circle(img,(x,y),100,(255,0,0),-1)
ix,iy = x,y
# Create a black image, a window and bind the function to window
img = np.zeros((512,512,3), np.uint8)
cv2.namedWindow('image')
cv2.setMouseCallback('image',draw_circle)
while(1):
cv2.imshow('image',img)
k = cv2.waitKey(20) & 0xFF
if k == 27:
break
elif k == ord('a'):
print ix,iy
cv2.destroyAllWindows()
它将鼠标位置存储在全局变量ix,iy
中.每次双击时,都会将值更改为新位置.按 a
打印新值.
It stores the mouse position in global variables ix,iy
. Every time you double-click, it changes the value to new location. Press a
to print the new value.
这篇关于如何使用 OpenCV 和 Python 将鼠标位置保存在变量中?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!