ee.Kernel.rotate
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Creates a Kernel.
Usage | Returns | Kernel.rotate(rotations) | Kernel |
Argument | Type | Details | this: kernel | Kernel | The kernel to be rotated. |
rotations | Integer | Number of 90 deg. rotations to make (negative numbers rotate counterclockwise). |
Examples
Code Editor (JavaScript)
// A kernel to be rotated.
var sobelKernel = ee.Kernel.sobel();
print(sobelKernel);
/**
* Output weights matrix
*
* [-1, 0, 1]
* [-2, 0, 2]
* [-1, 0, 1]
*/
print('One 90 degree clockwise rotation', sobelKernel.rotate(1));
/**
* [-1, -2, -1]
* [ 0, 0, 0]
* [ 1, 2, 1]
*/
print('Two 90 degree counterclockwise rotations', sobelKernel.rotate(-2));
/**
* [1, 0, -1]
* [2, 0, -2]
* [1, 0, -1]
*/
Python setup
See the
Python Environment page for information on the Python API and using
geemap
for interactive development.
import ee
import geemap.core as geemap
Colab (Python)
from pprint import pprint
# A kernel to be rotated.
sobel_kernel = ee.Kernel.sobel()
pprint(sobel_kernel.getInfo())
# Output weights matrix
# [-1, 0, 1]
# [-2, 0, 2]
# [-1, 0, 1]
print('One 90 degree clockwise rotation:')
pprint(sobel_kernel.rotate(1).getInfo())
# [-1, -2, -1]
# [ 0, 0, 0]
# [ 1, 2, 1]
print('Two 90 degree counterclockwise rotations:')
pprint(sobel_kernel.rotate(-2).getInfo())
# [1, 0, -1]
# [2, 0, -2]
# [1, 0, -1]
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Last updated 2023-10-06 UTC.
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