MATLAB: Saving an image with plot

image processingImage Processing Toolboximage segmentation

After reading an image, i implemented segmentation algorithm were i plotted a curving on the image tracing the the object of interest. Now i want to save the image with the plot super-imposed on it. Is it possible?? when i am using saving the figure, its taking a screen shot of the figure window and original dimension of the image is lost and there is a white background around the image. Also cant use imwrite as i am basically plotting the curve on the image and not editing the image matrix. Any help would be highly appreciated.

Best Answer

Try the FAQ http://matlab.wikia.com/wiki/FAQ?title=FAQ&cb=5240#How_do_I_save_my_figure.2C_axes.2C_or_image.3F_I.27m_having_trouble_with_the_built_in_MATLAB_functions.

which says to use export_fig.

Related Solutions

MATLAB: How to save an image from imshow() as a .jpeg

Have a look at print(), which pays attention to the figure PaperPosition* properties and to the figure InvertHardcopy property. It also allows a -r resolution option.

However, I would instead recommend using imwrite of the rgb matrix.

MATLAB: How to export a JPEG-image using MATLAB 7.5® (R2007b), such that the generated image is of the same size on both Windows and UNIX platforms

The JPEG-image generated on the UNIX platform looks smaller because, depending upon how MATLAB is started up on a Unix/MAC platform, the PRINT command could use either Ghostscript or MATLAB based drivers to export to bitmap formats.

When Ghostscript drivers are used, the resolution is set to a value of 72 dpi. In this case, the ‘-r100’ flag used in the PRINT command will be ignored.

Hence, in the above example code a JPEG image of the following number of pixels is generated on the both the platforms:

Windows: 400x600 (100 dpi)

UNIX : 288x432 (72 dpi)

To generate images of the same size on both platforms, one can modify the above piece of code, to increase the figure size for the UNIX platform as follows:

plot(1:10);
set(gcf,'PaperUnits','inches','PaperPosition',(100/72)*[0 0 6 4]);
print -djpeg -r100 picture1;

Best Answer

Related Solutions

MATLAB: How to save an image from imshow() as a .jpeg

MATLAB: How to export a JPEG-image using MATLAB 7.5® (R2007b), such that the generated image is of the same size on both Windows and UNIX platforms

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