Image Processing Toolbox

mat2gray

Convert a matrix to a grayscale intensity image

Syntax

• I = mat2gray(A,[amin amax])
  I = mat2gray(A)
  

Description

I = mat2gray(A,[amin amax]) converts the matrix A to the intensity image I. The returned matrix I contains values in the range 0 (black) to 1.0 (full intensity or white). amin and amax are the values in A that correspond to 0 and 1.0 in I.

I = mat2gray(A) sets the values of amin and amax to the minimum and maximum values in A.

Class Support

The input array, A, and the output image, I, are of class double.

Example

• I = imread('rice.tif');
  J = filter2(fspecial('sobel'),I);
  K = mat2gray(J);
  imshow(I)
  figure, imshow(K)
  
  
  

See Also

gray2ind

maketform

mean2