matlab - 带有网格线的gui中的图像转换为具有N×M网格尺寸和绘制点matlab的文本文件

Question

我在我的 gui 中有一个添加了网格线的图像。我需要能够创建和保存一个文本文件，该文件具有 N x M 维度的图形，其中包含网格中每个框的内容。

有没有办法做到这一点？

Answer 1

这是一个例子。

主文件

这应该是主脚本。

Grid_Size = [5 5];

Grid_Type = 1; % The group of the new clicked points.

% Initialize
Grid_Matrix = zeros(Grid_Size);
grid_h = []; % Grid image handle

fig_h = figure('Units', 'Normalized');

% Show your image
rgb = imread('peppers.png');
im_h = imshow(rgb);

% Shut off the 'HitTest' to keep the functionality of figure ButtonDownFcn
set(im_h, 'HitTest', 'Off');
hold on % Hold on for the overlaying grid image.

% Image normalized position
Image_Pos = get(ancestor(im_h, 'axes'), 'Position');
im_size = size(rgb(:,:,1));

% Set the Mouse click callback for the figure (to a script in this case)
set(fig_h, 'ButtonDownFcn', 'Mouse_Click');

Mouse_Click.m

脚本回调，我建议脚本而不是函数，以避免范围等的复杂性。

Clicked = fliplr((get(fig_h, 'CurrentPoint') - Image_Pos(1:2))./Image_Pos(3:4));

if ~sum(Clicked < 0) && ~sum(Clicked > 1) % If inside of the image is clicked

    % Find the corresponding matrix index
    ind = num2cell(ceil(Clicked.*Grid_Size));
    % and toggle that element
    if Grid_Matrix(ind{:}) == 0
        Grid_Matrix(ind{:}) = Grid_Type;
    else
        Grid_Matrix(ind{:}) = 0;
    end

    % Show the result to user
    delete(grid_h); % delete the previous grid image
    % resize the Grid Matrix to the image size
    Grid_Matrix_rs = imresize(flipud(Grid_Matrix), im_size, 'box');
    Grid_Matrix_rgb = label2rgb(Grid_Matrix_rs, 'spring', 'b');
    grid_h = imshow(Grid_Matrix_rgb);
    set(grid_h, 'HitTest', 'Off');
    set(grid_h, 'AlphaData', 0.3); % Show the grid image with an opacity

    % Write data to file after each update (user click)
    dlmwrite('GridBox.dat', flipud(Grid_Matrix));
end

请注意，flipud用于翻转矩阵以匹配图像索引。

在单击期间，您可以Grid_Type（使用 UI 或在命令窗口中）更改为另一个整数，以便获得另一种颜色。但是以前的颜色可能会改变，但最后所有相同的颜色在Grid_Matrix.

你会得到类似的东西：

对应于此Grid_Matrix：

4,0,3,0,2
0,1,0,0,0
3,0,1,0,4
2,0,2,1,0
0,0,3,0,0

从文件中读取结果

res = dlmread('GridBox.dat')