在Matlab的滑块中同时显示/连接两个图像？ [英] To show/join Two Images Simultaneously in Matlab's slider?

问题描述

我无法制作太大的文件（例如尝试

每个图像后滑块中断。
图片只是两张图片的截图：滑块的开头和结尾。蓝色区域只是OS X GUI，但仍然表明开始和结束之间存在间隙和中断。

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如何在Matlab的滑块中同时显示/加入两个图像？

解决方案

为了在这个滚动窗口中并排显示多个图像，我认为最简单的方法是将所有图像预先加载到<$ c $的数组中c> [nRows x（nColumns * nImages）x 3] 然后只需使用原始代码滚动浏览此内容。

  hFig = figure（'菜单栏'，'无'，'号码标题'，'关闭'，'颜色'，'k'）; 
 
 signal = []; 
 
％将所有图像加载到一个长图像中
表示k = 1：7 
 filename = fullfile（homedir，sprintf（'％d.png'，k） ）; 
 img = imread（filename）; 
 signal = cat（2，signal，img）; 
 end 
 
 %% //创建滑动窗口视频
 windowWidth = 320; ％宽度（以像素为单位）
 hImg = imshow（信号（：，1：1 + windowWidth，:)，... 
'InitialMagnification'，100，'Border'，'tight'）; 
 
 vid = VideoWriter（'signal.avi'）; 
 vid.Quality = 100; 
 vid.FrameRate = 60; 
 open（vid）; 
 
 M =大小（信号，2）; 
表示k = 1：（M  -  windowWidth）
 set（hImg，'CData'，signal（：，k：k + windowWidth，:)）
 writeVideo（vid，getframe（） ）; 
结束
 
结束（vid）; 
  

I cannot make too big file (like tried here) so I need to show only portions at a time. However, I cannot make the transfer from one file to another smooth in Matlab. I am trying to expand the solution of the thread To refresh imshow in Matlab? for two images. The problem is the ending of image A and start of the image B. Now, I have an interruption in the flow, which I do not like because I cannot show two images at the same time without an interruption.

In the example here, it is not needed to filter the axes. Code

iterationCounter=1;

hFig=figure('Menubar','none', 'NumberTitle','off', 'Color','k');
while(iterationCounter < 7)

    filenamePng=fullfile(homedir, '/Images/Raw/', iterationCounter, '.png');

    imgRGB=imread(filenamePng);

    % https://stackoverflow.com/a/29952648/54964
    %%// create sliding-window video
    len = 40*2^3;
    signal = imgRGB(:,1:end,:);
    hImg = imshow(signal(:,1:1+len,:), ...
        'InitialMagnification',100, 'Border','tight');

    vid = VideoWriter('signal.avi');
    vid.Quality = 100;
    vid.FrameRate = 60;
    open(vid);

    M = size(signal,2);
    for k=1:M-len
        set(hImg, 'CData',signal(:,k:k+len,:))
        writeVideo(vid, getframe());
    end

    iterationCounter=iterationCounter+1;
end

close(vid);

Output for Image A and Image B

where there is an interruption in the slider after each image. The picture is just a screenshot of two images: beginning and ending of the slider. The blue area is just OS X GUI but still indicates that there is a gap and interruption between the start and end.

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How can show/join two images simultaneously in Matlab's slider?

解决方案

In order to display multiple images side by side in this scrolling window, I think the easiest approach is to actually load all of the images upfront into an array that is [nRows x (nColumns * nImages) x 3] and then just use the original code to scroll through this.

hFig=figure('Menubar','none', 'NumberTitle','off', 'Color','k');

signal = [];

% Load all the images into one "long" image
for k = 1:7
    filename = fullfile(homedir, sprintf('%d.png', k));
    img = imread(filename);
    signal = cat(2, signal, img);
end

%%// create sliding-window video
windowWidth = 320; % Width in pixels
hImg = imshow(signal(:,1:1 + windowWidth,:), ...
    'InitialMagnification',100, 'Border','tight');

vid = VideoWriter('signal.avi');
vid.Quality = 100;
vid.FrameRate = 60;
open(vid);

M = size(signal,2);
for k = 1:(M - windowWidth)
    set(hImg, 'CData',signal(:,k:k + windowWidth,:))
    writeVideo(vid, getframe());
end

close(vid);

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