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

Version	Description
1.0.0	initial version

Author

Allan CORNET