修改程序with open('point.txt', 'r') as f: lines = f.readlines() matrix = np.zeros((m, n)) for line in lines: values = line.split() i = int((int(float(values[0])) - col1_min) / avg_interval_dx) j = int((int(float(values[1])) - col2_min) / (avg_interval_dy * 3)) matrix[i, j] = float(values[2])，将矩阵转换为灰度图像，并作膨胀运算

可以使用OpenCV库将矩阵转换为灰度图像，并对图像进行膨胀运算。以下是修改后的代码：

import cv2
import numpy as np

with open('point.txt', 'r') as f:
    lines = f.readlines()

matrix = np.zeros((m, n))
for line in lines:
    values = line.split()
    i = int((int(float(values[0])) - col1_min) / avg_interval_dx)
    j = int((int(float(values[1])) - col2_min) / (avg_interval_dy * 3))
    matrix[i, j] = float(values[2])

# 将矩阵转换为灰度图像
gray = cv2.normalize(matrix, None, 0, 255, cv2.NORM_MINMAX, cv2.CV_8U)

# 进行膨胀运算
kernel = np.ones((5, 5), np.uint8)
dilation = cv2.dilate(gray, kernel, iterations=1)

# 显示膨胀后的图像
cv2.imshow('Dilation', dilation)
cv2.waitKey(0)
cv2.destroyAllWindows()