验证码图片二值化去噪

package main

import (
	"image"

	"gocv.io/x/gocv"
)

func main() {
   
	mat := gocv.IMRead("2.png", gocv.IMReadColor)
	defer mat.Close()

	bilatera := gocv.NewMat()
	defer bilatera.Close()

	gocv.BilateralFilter(mat, &bilatera