Page Summary
-
The
Kernel.addmethod performs pointwise addition of two kernels after aligning their centers. -
This method returns a new
Kernelobject representing the sum. -
The
normalizeargument, which defaults to false, determines whether the resulting kernel is normalized. -
The examples show how two kernels with different dimensions are added and the resulting kernel weights.
| Usage | Returns |
|---|---|
Kernel.
add
(kernel2, normalize
)
|
Kernel |
| Argument | Type | Details |
|---|---|---|
|
this:
kernel1
|
Kernel | The first kernel. |
kernel2
|
Kernel | The second kernel. |
normalize
|
Boolean, default: false | Normalize the kernel. |
Examples
Code Editor (JavaScript)
// Two kernels, they do not need to have the same dimensions. var kernelA = ee . Kernel . chebyshev ({ radius : 3 }); var kernelB = ee . Kernel . square ({ radius : 1 , normalize : false , magnitude : 100 }); print ( kernelA , kernelB ); /** * Two kernel weights matrices * * [3, 3, 3, 3, 3, 3, 3] * [3, 2, 2, 2, 2, 2, 3] * [3, 2, 1, 1, 1, 2, 3] [100, 100, 100] * A [3, 2, 1, 0, 1, 2, 3] B [100, 100, 100] * [3, 2, 1, 1, 1, 2, 3] [100, 100, 100] * [3, 2, 2, 2, 2, 2, 3] * [3, 3, 3, 3, 3, 3, 3] */ print ( 'Pointwise addition of two kernels' , kernelA . add ( kernelB )); /** * [3, 3, 3, 3, 3, 3, 3] * [3, 2, 2, 2, 2, 2, 3] * [3, 2, 101, 101, 101, 2, 3] * [3, 2, 101, 100, 101, 2, 3] * [3, 2, 101, 101, 101, 2, 3] * [3, 2, 2, 2, 2, 2, 3] * [3, 3, 3, 3, 3, 3, 3] */
import ee import geemap.core as geemap
Colab (Python)
# Two kernels, they do not need to have the same dimensions. kernel_a = ee . Kernel . chebyshev ( ** { 'radius' : ee . Number ( 3 )}) kernel_b = ee . Kernel . square ( ** { 'radius' : 1 , 'normalize' : False , 'magnitude' : 100 }) display ( 'a:' , kernel_a ) display ( 'b:' , kernel_b ) # Two kernel weights matrices # [3, 3, 3, 3, 3, 3, 3] # [3, 2, 2, 2, 2, 2, 3] # [3, 2, 1, 1, 1, 2, 3] [100, 100, 100] # A [3, 2, 1, 0, 1, 2, 3] B [100, 100, 100] # [3, 2, 1, 1, 1, 2, 3] [100, 100, 100] # [3, 2, 2, 2, 2, 2, 3] # [3, 3, 3, 3, 3, 3, 3] display ( 'Pointwise addition of two kernels:' , kernel_a . add ( kernel_b )) # [3, 3, 3, 3, 3, 3, 3] # [3, 2, 2, 2, 2, 2, 3] # [3, 2, 101, 101, 101, 2, 3] # [3, 2, 101, 100, 101, 2, 3] # [3, 2, 101, 101, 101, 2, 3] # [3, 2, 2, 2, 2, 2, 3] # [3, 3, 3, 3, 3, 3, 3]
