使用python进行边缘检测

Question

Manipulate[m = n;
 Show[{
   Plot[Sin[x], {x, -10, 10}, PlotRange -> {-5, 5}, 
    PlotStyle -> {Thick, Red}],
   Plot[Evaluate[
     Accumulate[List @@ Normal@Series[Sin[x], {x, 0, m}]]], {x, -10, 10}]}],
    {{n, 3}, 3, 25, 2}]

我收到此错误

import cv2
import numpy as np

cap = cv2.VideoCapture()

while True:
    _, frame = cap.read()

    laplacia = cv2.Laplacian(frame, cv2.CV_64F)

    cv2.imshow('original', frame)
    cv2.imshow('laplacian', laplacia)

    k = cv2.waitKey(5) & 0xFF
    if k==27:
        break

cv2.destroyAllWindows()
cap.release()

Answer 1

cv2.Laplacian()无法使用彩色图片。

您可以通过OpenCV文档了解更多信息.. Image Gradients

您必须将捕获的帧转换为灰度，然后应用Laplacian

gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

您可以转换为灰度，如上所示..