Summary of methods for saving images in MATLAB

Thanks to the summary of the conscientious.

Reprint: http://blog.csdn.net/holybin/article/details/39502077

1. Using the Imwrite function

If the image is IMG, you can use Imwrite (img, ' result.jpg '); This method saves the image size and displays the same size. The following method does not get the same size as the original image:

2. Save directly as

In figure, use the menu file->saveas-> to select the Save form (which can be saved in the format fig,eps,jpeg,gif,png,bmp, etc.). The disadvantage of this is that there is a great sacrifice for the image sharpness that is saved.

3. Copy and paste

Using the menu edit->copyfigure in figure, the image is copied to the Clipboard. Note that you want to select "Bitmap" in the "copy Options".

4, with the SaveAs command

MATLAB provides a direct SaveAs function to save the image in a specified figure or a block diagram in Simulink. The SaveAs format is: SaveAs (GCA, filename, FileFormat), with three parameters:

(1) GCA: Graphic handle, if the graphics window title bar is "Figure 3", then the handle is 3; You can also get the current window handle directly from the GCF.

(2) FileName: Single quote string, specifying file name

(3) FileFormat: Single quote string, specifying storage format

Example:

[Plain] View plain copy SaveAs (GCF, ' save.jpg ');     % Save the image of the current window in SaveAs (2, ' save.jpg '); % Save Figure 2 window image 5, print function

The print function operates the printer using the plot function followed by the print function to save the image. Print is in the format: print (Figure_handle,fileformat,filename) with three parameters:

(1) Figure_handle: Graphic handle, if the graphics window title bar is "Figure 3", then the handle is 3; You can also get the current window handle directly from the GCF

(2) FileFormat: Single quote string, specifying storage format:

PNG format: '-dpng '

JPEG format: '-djpeg ',

TIFF format: '-dtiff '

BMP format: '-dbitmap '

GIF format: '-dgif '

EMF lossless format: '-dmeta '

(3) FileName: file name

Example 1: Displaying an image and saving

[Plain] View plain copy x=-pi:2*pi/1000:pi;   Y=cos (x); Plot (x, y);p rint (GCF, '-djpeg ', ' abc.jpg ')% draw the image and save it in JPG format

Example 2: Save directly without displaying an image

[Plain] View plain copy x=-pi:2*pi/1000:pi;   Set (figure (1), ' visible ', ' off '); Plot (X,sin (x)); Print (GCF, '-dpng ', ' abc.png ')% does not display images directly saved to PNG format