imwrite

Write image to graphics file.

Syntax

• imwrite(A, filename)
• imwrite(A, map, filename)
• imwrite(..., fmt)
• imwrite(..., , propertyName, propertyValue)

Input argument

• A - matrix: 3D for color and 2D for gray or indexed image.
• map - Colormap of indexed image:m-by-3 array.
• fmt - Format of output file: 'bmp', 'png', 'jpg', ...
• filename - a row vector characters or scalar string: name of graphics file.
• propertyName - a scalar string or row vector character.
• propertyValue - a value.

Description

imwrite(A, filename) writes image data A to the file specified by filename

Property name:

Quality: quality of output file: scalar in the range [0, 100] (75 as default).

Alpha: matrix of values in the range [0, 1]: Transparency of each pixel.

Comment: character vector, string scalar, cell array of character vectors or string array: Comment added to image.

Author: character vector or string scalar: Author information.

Example

f = figure();
A = rand(69, 69);
A(:,:,2) = rand(69,69);
A(:,:,3) = rand(69,69);
imshow(A);
imwrite(A, [tempdir, '69x69-RGB.png']);

See also

imread, imshow.

History

Author

Allan CORNET