How to update the variable of a function using a dialogbox?

Question

Emerson De Souza 2013-4-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69993-how-to-update-the-variable-of-a-function-using-a-dialogbox

INTRO: I use the script below to track the shift of a pixel between two images:

clear all; close all;
prompt          =   {'CORRELATION SIZE:'};
dlg_title       =   'SHIFTED PIXEL';
def             =   {'5'};
answer          =   inputdlg(prompt,dlg_title,[1 20],def);
CORRSIZE        =   str2num(answer{1,1}); %#ok<ST2NM>
base_points_0   =   [56  37];
input_points_0  =   [56  37];
imagea          =   imread('1.bmp');
imageb          =   imread('2.bmp');
image1          =   rgb2gray(imagea);
image2          =   rgb2gray(imageb);
d               =   zeros(1,2,2);
d(:,:,1)        =   base_points_0;
[input_points, base_points] = cpselect(image2,image1, input_points_0, base_points_0,'Wait', true);
updated_inputs  =   cpcorr(input_points, base_points, image2, image1);
d(:,:,2)        =   updated_inputs;

The shift of a pixel between two images is correct if the variable CORRSIZE found in line 76 of cpcorr.m is chosen properly. Therefore, I begin the script with a dialo-gbox to allow to chose the CORRSIZE before the script runs.

PROBLEM: CORRSIZE is updated only in the workspace but not in the function cpcorr.m and consequently I always have to open cpcorr.m from the command line, go to line 76 and change it manually.

I wonder if someone could write me how could I update CPCORR from a dialog-box incorporated in the current script and thus avoid to open cpcorr.m and do all steps manually.

I thank you in advance for your help Emerson

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Ahmed A. Selman 2013-4-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69993-how-to-update-the-variable-of-a-function-using-a-dialogbox#answer_81171

在 MATLAB Online 中打开

Try the (while) loop with simple criterion, as:

    clear all; close all;
    prompt          =   {'CORRELATION SIZE:'};
    dlg_title       =   'SHIFTED PIXEL';
    def             =   {'5'};
    CORRSIZE        =   5; % Here. Or any initial value, see below why
    while (CORRSIZE); % Here.
    answer          =   inputdlg(prompt,dlg_title,[1 20],def);
    CORRSIZE        =   str2num(answer{1,1}); %#ok<ST2NM>
    if CORRSIZE==0; % Here. When you input ZERO it will stop.
        break % Here
    end % Here. To end the endless loop
    base_points_0   =   [56  37];
    input_points_0  =   [56  37];
    imagea          =   imread('1.bmp');
    imageb          =   imread('2.bmp');
    image1          =   rgb2gray(imagea);
    image2          =   rgb2gray(imageb);
    d               =   zeros(1,2,2);
    d(:,:,1)        =   base_points_0;
    [input_points, base_points] = cpselect(image2,image1, input_points_0, base_points_0,'Wait', true);
    updated_inputs  =   cpcorr(input_points, base_points, image2, image1);
    d(:,:,2)        =   updated_inputs;
    end % Here. End of while loop

Please notice that I added the lines ending with ( %Here ). Perhaps it works now as required.

3 个评论
显示 1更早的评论隐藏 1更早的评论

Ahmed A. Selman 2013-4-6

在 MATLAB Online 中打开

Yes, sorry I didn't fully understand it the first time. In this case you must edit and change the cpcorr.m file.

First please note that this is a Matlab global function so I really don't know if someone can modify it and use it publicly, that's for you to find out :)

As for the required task, do the following (refer to the same code I posted above) :

1. Open cpcorr.m with the editor.

2. In line 1, change

function xyinput = cpcorr(varargin)

to

function xyinput = modf_cpcorr(CORRSIZE,varargin)

and save the function with the new name (modf_cpcorr.m) - I meant to rename the function to a modified cpcorr function, leaving the original one intact.

3. In the modf_cpcorr.m file, line 76, instead of

CORRSIZE = 5;

change it to

%CORRSIZE = 5;

and save and close the function.

4. In the code posted above (my answer), go to line 23 and change

updated_inputs = cpcorr(input_points, base_points, image2, image1);

to this

     updated_inputs  =   modf_cpcorr(CORRSIZE,input_points, base_points, image2, image1);

then save and run.

This should pass the value of the variable CORRSIZE to the function modf_cpcorr from your file while it is running, acquired from the input dialog box, and with initial value (5). Only the value (0) will cause the program to stop (or you can press Ctrl+C to force it to terminate).

Please do not hesitate if you needed further modification, I hope this time I understood the problem and solved it. Regards.

Emerson De Souza 2013-4-6

PROBLEM SOLVED:)!!!

Ahmed, thank you so much for your suggestion, your modification does exactly what I want. I appreciate you took the time to think about it. Wish you a nice weekend.

Emerson

请先登录，再进行评论。

How to update the variable of a function using a dialogbox?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

3 个评论
显示 1更早的评论隐藏 1更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

Community Treasure Hunt

How to update the variable of a function using a dialogbox?

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

3 个评论 显示 1更早的评论隐藏 1更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

3 个评论
显示 1更早的评论隐藏 1更早的评论