Parent class for all image filters.
ImageFilter subclasses are supposed to define methods:
- Process(self,data)
returning the modified data
- ProcessHeader(self,header)
returning the modified header
and one instance variable:
displaydefaultstate -- set to 1 if this filter should be enabled
by default when ndisp displays the image.
The documentation string of the class is used in the ndisp menu
structure, so it should be a single concise line.
All filters classes are listed in imagefilter.Filters for ndisp
to be able to build up its menu.
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Methods
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Frame
GetState
HeaderInfo
Process
ProcessHeader
SetState
xinit
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Frame
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Frame ( self, data )
Frame handler, will call self.Process if the filter is switched on |
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GetState
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GetState ( self )
Return 1 if currently enabled, 0 otherwise. |
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HeaderInfo
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HeaderInfo ( self, data )
Header handler, will call self.ProcessHeader if the filter is switched on |
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Process
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Process ( self, data )
Default processing operation: Nop |
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ProcessHeader
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ProcessHeader ( self, header )
Default processing operation: Nop |
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SetState
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SetState ( self, newstate )
Switch filter on/off |
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xinit
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xinit (
self,
*arg,
*kw,
)
Xtra initialization. |
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