把这段代码写成matlab代码：import cv2 import matplotlib.pyplot as plt imagepath = r'1.jpg' image = cv2.imread(imagepath) height, width, channel = image.shape for i in range(height): for j in range(width): b, g, r = image[i, j] if 200<= r <= 255

这是将图像中红色通道在200到255之间的像素点标记为蓝色的代码，以下为MATLAB代码实现：

imagepath = '1.jpg';
image = imread(imagepath);
[height, width, channel] = size(image);
for i = 1:height
    for j = 1:width
        r = image(i, j, 1);
        g = image(i, j, 2);
        b = image(i, j, 3);
        if (r >= 200) && (r <= 255)
            image(i, j, :) = [0, 0, 255]; % 标记为蓝色
        end
    end
end
imshow(image);