imadd

Add two images or add constant to image

Syntax

Z = imadd(X,Y)

Description

Z = imadd(X,Y) adds each element in array X with the corresponding element in array Y and returns the sum in the corresponding element of the output array Z. X and Y are real, nonsparse numeric arrays with the same size and class, or Y is a scalar double. Z has the same size and class as X, unless X is logical, in which case Z is double.

If X and Y are integer arrays, elements in the output that exceed the range of the integer type are truncated, and fractional values are rounded.

Examples

Add two uint8 arrays. Note the truncation that occurs when the values exceed 255.

X = uint8([ 255 0 75; 44 225 100]);
Y = uint8([ 50 50 50; 50 50 50 ]);
Z = imadd(X,Y)
Z =

   255    50   125
    94   255   150

Add two images together and specify an output class.

I = imread('rice.png');
J = imread('cameraman.tif');
K = imadd(I,J,'uint16');
imshow(K,[])

Add a constant to an image.

I = imread('rice.png');
J = imadd(I,50);
subplot(1,2,1), imshow(I) 
subplot(1,2,2), imshow(J)
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