MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guide de l'utilisateur télécharger pdf (Page 90)

4 Conversions

5 Use the Image from Workspace block to import your image from the

MATLAB workspace. Set the Value parameter to

6 Use the Vi

deo Viewer1 block to view the original intensity im a ge. Accept

the defa

ult parameters.

7 Use the C onstant block to define a threshold value for the Relational

Operator block. Since the pixel values range from 0 to 255, set the

Constant value parameter to

128. This value is image dependent.

8 Use the Relational Operator block to perform a thresholding operation

that converts your intensity image to a binary image. Set the Relational

Operator parameter to

>. If the input to the Relational Operator block

is g reater than 128, its output is a Boolean 1; otherwise, its output is

a Boolean 0.

4-4

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MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guide de l'utilisateur Page 90