MATLAB: To save the existing file can I use append function

append functionoverwrite

hi sir,I use append function in matlab to save the existing image that have been save in a folder. however, when I run the program again, the image is overwritten and rewrite with other image.what should I do.thanks! syntax: filename1:strcat('user/matlab/folder',num2str,'.jpg')) imwrite(x,filename1,'writemode','append')

Best Answer

You cannot append to a JPEG.
You num2str does not have an argument.

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MATLAB: Writing images superimposed with coloured boundaries

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_save_my_figure.2C_axes.2C_or_image.3F_I.27m_having_trouble_with_the_built_in_MATLAB_functions.

MATLAB: Does MATLAB support writing multipage TIFF files

IMWRITE supports multipage TIFF files as the following example illustrates:

a = imread('peppers.png');
imwrite(a, 'myFile.TIFF')
imwrite(rgb2gray(a), 'myFile.TIFF', 'writemode', 'append')

Hence, IMWRITE will write the images on a single page one above the other. We use "append" parameter to do this. When using IMREAD to read the same image, you could use indexing as described in the documentation, to read the various images aligned by IMWRITE.

For example, the following commands would read and display both the frames from myFile.TIFF.

imshow(imread('myFile.TIFF',1))
imshow(imread('myFile.TIFF',2))

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MATLAB: Does MATLAB support writing multipage TIFF files

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