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imdivide

Divide one image into another or divide image by constant

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Syntax

Z = imdivide(X,Y)

Description

Z = imdivide(X,Y) divides each element in the array X by the corresponding element in array Y and returns the result in the corresponding element of the output array Z.

example

Examples

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Open Live Script

This example shows how to divide two uint8 arrays. 

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

Divide each element in X by the corresponding element in Y. Note that fractional values greater than or equal to 0.5 are rounded up to the nearest integer.

Z = imdivide(X,Y)
Z = 2x3 uint8 matrix

   5   0   2
   1   5   2

Divide each element in Y by the corresponding element in X. Note that when dividing by zero, the output is truncated to the range of the integer type.

W = imdivide(Y,X)
W = 2x3 uint8 matrix

     0   255     1
     1     0     1
Open Live Script

Read a grayscale image into the workspace.

I = imread('rice.png');

Estimate the background.

background = imopen(I,strel('disk',15));

Divide out the background from the image.

J = imdivide(I,background);

Display the original image and the processed image.

imshow(I)

Figure contains an axes object. The hidden axes object contains an object of type image.

figure
imshow(J,[])

Figure contains an axes object. The hidden axes object contains an object of type image.

Open Live Script

Read an image into the workspace.

I = imread('rice.png');

Divide each value of the image by a constant factor of 2.

J = imdivide(I,2);

Display the original image and the processed image.

imshow(I)

Figure contains an axes object. The hidden axes object contains an object of type image.

figure
imshow(J)

Figure contains an axes object. The hidden axes object contains an object of type image.

Input Arguments

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First array, specified as a numeric array or logical array of any dimension.

Second array (divisor) to be divided from X, specified as a numeric or logical array of the same size and class as X, or a numeric scalar of type double.

Output Arguments

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Quotient, returned as a numeric array of the same size as X. Z is the same class as X unless X is logical, in which case Z is data type double. If X is an integer array, elements of the output that exceed the range of the integer type are truncated, and fractional values are rounded.

Version History

Introduced before R2006a

See Also

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