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Hi,

I have a number of errors that are popping up using both 'openpiv-matlab-master' and 'openpiv-matlab-1.1' on different versions of Matlab.

The errors read as follows 'Input argument 'xxxxx' might be unused. If this is OK, consider replacing it by ~.' where xxxxx are the highlighted variables in the above print screen.

Thanks.

I am very new to PIV and am using R202a. When I am trying to open load images the following errors pop up in Matlab. Do I need to add open PIV anywhere in the Matlab directory or it is enough to open openpivgui in the folder?

Reference to non-existent field 'axes1'.

Error in openpivgui>load_Callback (line 382)
axes(handles.axes1);

Error in gui_mainfcn (line 95)
feval(varargin{:});

Error in openpivgui (line 42)
gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)openpivgui('load_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating Menu Callback.

Kindest Regards,
Mahdi

suggested to remove

I run the code under matlab 2013a and 2014a； when loaing test image to the GUI, there will be sereval errors showing below:

openpivgui
Index exceeds matrix dimensions.

Error in openpivgui>ReadImageDirectory (line 898)
firstDif = find(handles.files{2}-handles.files{1},1,'first'); % how the
first two files are different?

Error in openpivgui>load_Callback (line 410)
handles = ReadImageDirectory(handles);

Error in gui_mainfcn (line 96)
feval(varargin{:});

Error in openpivgui (line 42)
gui_mainfcn(gui_State, varargin{:});

Error in
@(hObject,eventdata)openpivgui('load_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uimenu Callback

What's the reason???

s2n value is not yet assigned, to be put high enough (or low enough?)

the u,v values are modified, but x,y remain in pixels

version information is missing as well as the license

Dear all,

I am running the jpg file. From 600 pictures that I had, 500 were successfully analyzed but it comes to this error when reaching the 500th pictures. Any solution is appreciated.

Have a good day,

_Operands to the || and && operators must be convertible to logical scalar values.

Error in find_displacement_rect (line 47)
if x2 > 1 && y2 > 1 && x2 < NfftHeight && y2 < NfftWidth

Error in openpivgui>openpiv_main_loop (line 1036)
[peak1,peak2,pixi,pixj] = find_displacement_rect(c,s2ntype);

Error in openpivgui>pushbutton_start_Callback (line 477)
openpiv_main_loop(handles, fileind, jump, cropvec,ittWidth,...

Error in gui_mainfcn (line 95)
feval(varargin{:});

Error in openpivgui (line 42)
gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)openpivgui('pushbutton_start_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback._

When i try to upload images get the following error

Error using openpiv_imread
Too many input arguments.

Error in openpivgui>load_Callback (line 406)
im = openpiv_imread(handles,1);

Error in gui_mainfcn (line 95)
feval(varargin{:});

Error in openpivgui (line 42)
gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)openpivgui('load_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating Menu Callback.

May feel dumb but will appreciate help

Hadar reported the bug with the 2017 version

axes(handles.axes1) (line 382)

reference to non-existing field axes1'

I'm trying to use OpenPIV for the first time. In the GUI, I selected two images from /test1, and selected a small ROI. When clicking "Start" the wheel spins forever. I have MATLAB version 2018, so I'm not sure what the problem is. I did not adjust any of the default settings.

Feel pretty dumb but I fail to see how I am supposed to start the program. I run openpivgui.m in matlab but it's only the gui, I get error when I try to use the buttons. Should I put the folder openpiv in Matlab's folder?

How do I analyze several frames (such as 500) frames of a video without just comparing each frame one after another?