System object: visionhdl.GrayscaleErosion
Package: visionhdl
Report eroded pixel value based on neighborhood
[pixelOut,ctrlOut] = step(erode,pixelIn,ctrlIn)
Starting in R2016b, instead of using the step
method
to perform the operation defined by the System
object™, you can
call the object with arguments, as if it were a function. For example, y
= step(obj,x)
and y = obj(x)
perform
equivalent operations.
[pixelOut,ctrlOut] = step(erode,pixelIn,ctrlIn)
returns
the next pixel value, pixelOut
, resulting from
a morphological erosion of the neighborhood around each input pixel
intensity value, pixelIn
.
This object uses a streaming pixel interface with a structure
for frame control signals. This interface enables the object to operate independently of image
size and format, and to connect with other Vision HDL
Toolbox™ objects. The object accepts and returns a scalar pixel value. The object accepts
and returns control signals as a structure containing five signals. The control signals indicate
the validity of each pixel and its location in the frame. To convert a pixel matrix into a pixel
stream and control signals, use the visionhdl.FrameToPixels
object. For a full
description of the interface, see Streaming Pixel Interface.
The System
object performs an initialization the first time
you call the step
method. This initialization locks
nontunable properties and input specifications, such as dimensions,
complexity, and data type of the input data. If you change a nontunable
property or an input specification, the object issues an error. To
change nontunable properties or inputs, first call the release
method
to unlock the object.