5 Geometri c Transformation
Cropping an Image
You can use the Selector block to cro p your image or video stream. In this
examp le, you learn how to use th e S elector block to trim an image down to a
particular region of interest:
1 Define an intensity image in the MATLAB workspace. At the MATLAB
command prompt, type
I = imread('coins.png ');
I
is a 246-by-300 m atrix of 8-bit unsigned integer values.
2 To view the image this matrix represents, at the MATLAB command
prompt, type
imshow(I)
3 Create a new Simulink model, and add to it the blocks shown in the
following table.
5-20
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