ee.Kernel.rotate
Mit Sammlungen den Überblick behalten
Sie können Inhalte basierend auf Ihren Einstellungen speichern und kategorisieren.
Erstellt einen Kernel.
Nutzung | Ausgabe |
---|
Kernel.rotate(rotations) | Kernel |
Argument | Typ | Details |
---|
So gehts: kernel | Kernel | Der zu rotierende Kernel. |
rotations | Ganzzahl | Anzahl der 90‑Grad-Drehungen. Bei negativen Zahlen wird gegen den Uhrzeigersinn gedreht. |
Beispiele
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 einrichten
Informationen zur Python API und zur Verwendung von geemap
für die interaktive Entwicklung finden Sie auf der Seite
Python-Umgebung.
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]
Sofern nicht anders angegeben, sind die Inhalte dieser Seite unter der Creative Commons Attribution 4.0 License und Codebeispiele unter der Apache 2.0 License lizenziert. Weitere Informationen finden Sie in den Websiterichtlinien von Google Developers. Java ist eine eingetragene Marke von Oracle und/oder seinen Partnern.
Zuletzt aktualisiert: 2025-07-26 (UTC).
[null,null,["Zuletzt aktualisiert: 2025-07-26 (UTC)."],[[["\u003cp\u003e\u003ccode\u003erotate()\u003c/code\u003e is a method applied to a Kernel object to rotate its weights matrix by a specified number of 90-degree turns.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003erotations\u003c/code\u003e argument accepts an integer, with positive values indicating clockwise rotations and negative values indicating counterclockwise rotations.\u003c/p\u003e\n"],["\u003cp\u003eRotating a kernel changes the direction in which the kernel is applied, impacting the output of image processing operations.\u003c/p\u003e\n"],["\u003cp\u003eThe examples provided demonstrate how to rotate a Sobel kernel by 90 degrees clockwise, and by 180 degrees (two 90-degree turns counterclockwise).\u003c/p\u003e\n"]]],[],null,["# ee.Kernel.rotate\n\nCreates a Kernel.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------|---------|\n| Kernel.rotate`(rotations)` | Kernel |\n\n| Argument | Type | Details |\n|----------------|---------|----------------------------------------------------------------------------------|\n| this: `kernel` | Kernel | The kernel to be rotated. |\n| `rotations` | Integer | Number of 90 degree rotations to make. Negative numbers rotate counterclockwise. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A kernel to be rotated.\nvar sobelKernel = ee.Kernel.sobel();\nprint(sobelKernel);\n\n/**\n * Output weights matrix\n *\n * [-1, 0, 1]\n * [-2, 0, 2]\n * [-1, 0, 1]\n */\n\nprint('One 90 degree clockwise rotation', sobelKernel.rotate(1));\n\n/**\n * [-1, -2, -1]\n * [ 0, 0, 0]\n * [ 1, 2, 1]\n */\n\nprint('Two 90 degree counterclockwise rotations', sobelKernel.rotate(-2));\n\n/**\n * [1, 0, -1]\n * [2, 0, -2]\n * [1, 0, -1]\n */\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\nfrom pprint import pprint\n\n# A kernel to be rotated.\nsobel_kernel = ee.Kernel.sobel()\npprint(sobel_kernel.getInfo())\n\n# Output weights matrix\n\n# [-1, 0, 1]\n# [-2, 0, 2]\n# [-1, 0, 1]\n\nprint('One 90 degree clockwise rotation:')\npprint(sobel_kernel.rotate(1).getInfo())\n\n# [-1, -2, -1]\n# [ 0, 0, 0]\n# [ 1, 2, 1]\n\nprint('Two 90 degree counterclockwise rotations:')\npprint(sobel_kernel.rotate(-2).getInfo())\n\n# [1, 0, -1]\n# [2, 0, -2]\n# [1, 0, -1]\n```"]]