imwrite

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mostafa
mostafa 2012-5-22
编辑： DGM 2024-9-25
hi i have two porblem please help me 1- why varible B of the previouse function not known for the next function ?? 2 -what code is required for the save image with written informatin (time by text) ?
function Recogtion_Callback(hObject, eventdata, handles)
% % % % % %
cla(handles.axes3)
[B,f]=uigetfile('*.jpg;*.tif;*.png;*.gif');
ff=[f B];
axes(handles.axes3);
imshow(ff);
guidata(hObject, handles);
tm=datestr(now,'yyyy/mm/dd HH:MM:SS');
text(15,20,tm,'color','r','fontsize',16)
function Save_Callback(hObject, eventdata, handles)
tm=datestr(now,'yyyymmddTHHMMSS');
n=strcat('d:\',tm,'.jpg');
imwrite (B,n);
guidata(hObject, handles);
[EDITED, code formatted, Jan]

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回答（1 个）

Jan
Jan 2012-5-22
编辑：DGM 2024-9-25
Do you assume that B is known inside the function SaveCallback? If so, this assumption is wrong. The visibility of variables is limited to their functions. This is explained in the Getting Started chapters of the documentation.
What does "save image with written information" exactly mean? Do you want to add a comment? Then reading imwrite() will provide the necessary arguments.
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Walter Roberson
Walter Roberson 2012-5-26
The mechanism for that is to text() onto the image, and then getsnap() and imwrite() that result.
Image Analyst
Image Analyst 2012-5-26
编辑：DGM 2024-9-25
You can use insertText() in the Computer Vision Toolbox, or try this File Exchange submission: http://www.mathworks.com/matlabcentral/fileexchange/31187-label-image

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