MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guida Utente Scaricare il pdf (Pagina 143)

CountingObjectsinanImage

You are now ready to set your block parameters by double-clicking the

blocks, modifying the blo ck parameter values, and clicking OK.

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

MATLAB workspace. Set the Value parameter to

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

Operator block. Set the Constant value parameter to

200.

7 Use the Video Viewer1 block to view the original im age. A ccept the default

parameters.

8 Use the Relational Operator block to perform a thresholding operation

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

Operator param eter to

If the input to the R elational Operator block is less than 200, its output

is 1; otherwise, its output is 0. You must threshold your intensity image

because the Label block expects binary input. Also, the objects it counts

must be white.

9 Use the Opening block to separate the spokes from the rim and from each

other at the center of the wheel. Use the default parame ters.

6-5

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MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guida Utente Pagina 143