Kernel¶
- class astropy.convolution.Kernel(array)[source]¶
Bases:
object
Convolution kernel base class.
- Parameters:
- array
ndarray
Kernel array.
- array
Attributes Summary
Filter kernel array.
Index of the kernel center.
Kernel dimension.
Indicates if kernel is bool.
Kernel response model.
Indicates if the filter kernel is separable.
Shape of the kernel array.
Absolute deviation of the sum of the kernel array values from one.
Methods Summary
normalize
([mode])Normalize the filter kernel.
Attributes Documentation
- array¶
Filter kernel array.
- center¶
Index of the kernel center.
- dimension¶
Kernel dimension.
- is_bool¶
Indicates if kernel is bool.
If the kernel is bool the multiplication in the convolution could be omitted, to increase the performance.
- model¶
Kernel response model.
- separable¶
Indicates if the filter kernel is separable.
A 2D filter is separable, when its filter array can be written as the outer product of two 1D arrays.
If a filter kernel is separable, higher dimension convolutions will be performed by applying the 1D filter array consecutively on every dimension. This is significantly faster, than using a filter array with the same dimension.
- shape¶
Shape of the kernel array.
- truncation¶
Absolute deviation of the sum of the kernel array values from one.
Methods Documentation