Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ee.Kernel.circle
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Menghasilkan kernel boolean berbentuk lingkaran.
| Penggunaan | Hasil |
|---|
ee.Kernel.circle(radius, units, normalize, magnitude) | Kernel |
| Argumen | Jenis | Detail |
|---|
radius | Float | Radius kernel yang akan dibuat. |
units | String, default: "pixels" | Sistem pengukuran untuk kernel ('piksel' atau 'meter'). Jika kernel ditentukan dalam meter, kernel akan diubah ukurannya saat level zoom diubah. |
normalize | Boolean, default: benar (true) | Menormalisasi nilai kernel agar berjumlah 1. |
magnitude | Float, default: 1 | Menskalakan setiap nilai dengan jumlah ini. |
Contoh
Code Editor (JavaScript)
print('A circle kernel', ee.Kernel.circle({radius: 3}));
/**
* Output weights matrix (up to 1/1000 precision for brevity)
*
* [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]
* [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
* [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
* [0.034, 0.034, 0.034, 0.034, 0.034, 0.034, 0.034]
* [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
* [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
* [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]
*/
Penyiapan Python
Lihat halaman
Lingkungan Python untuk mengetahui informasi tentang Python API dan penggunaan
geemap untuk pengembangan interaktif.
import ee
import geemap.core as geemap
Colab (Python)
from pprint import pprint
print('A circle kernel:')
pprint(ee.Kernel.circle(**{'radius': 3}).getInfo())
# Output weights matrix (up to 1/1000 precision for brevity)
# [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]
# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
# [0.034, 0.034, 0.034, 0.034, 0.034, 0.034, 0.034]
# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]
# [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-26 UTC."],[[["\u003cp\u003eGenerates a circle-shaped kernel for use in image processing.\u003c/p\u003e\n"],["\u003cp\u003eThe kernel's radius can be specified in pixels or meters.\u003c/p\u003e\n"],["\u003cp\u003eKernel values can be normalized to sum to 1 and scaled by a magnitude factor.\u003c/p\u003e\n"],["\u003cp\u003eUseful for operations like blurring or smoothing where a circular neighborhood is desired.\u003c/p\u003e\n"]]],["`ee.Kernel.circle()` generates a circle-shaped boolean kernel, which is returned as a Kernel object. The function takes `radius` (float) to set the kernel's size. `units` (string, 'pixels' or 'meters') defines the measurement system, with meters resizing at different zoom levels. `normalize` (boolean) determines if kernel values sum to 1. `magnitude` (float) scales each value. Example code provided demonstrate kernel creation in both JavaScript and Python, with resulting matrix outputs.\n"],null,["# ee.Kernel.circle\n\nGenerates a circle-shaped boolean kernel.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------------------------------|---------|\n| `ee.Kernel.circle(radius, `*units* `, `*normalize* `, `*magnitude*`)` | Kernel |\n\n| Argument | Type | Details |\n|-------------|---------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `radius` | Float | The radius of the kernel to generate. |\n| `units` | String, default: \"pixels\" | The system of measurement for the kernel ('pixels' or 'meters'). If the kernel is specified in meters, it will resize when the zoom-level is changed. |\n| `normalize` | Boolean, default: true | Normalize the kernel values to sum to 1. |\n| `magnitude` | Float, default: 1 | Scale each value by this amount. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint('A circle kernel', ee.Kernel.circle({radius: 3}));\n\n/**\n * Output weights matrix (up to 1/1000 precision for brevity)\n *\n * [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]\n * [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n * [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n * [0.034, 0.034, 0.034, 0.034, 0.034, 0.034, 0.034]\n * [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n * [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n * [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]\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\nprint('A circle kernel:')\npprint(ee.Kernel.circle(**{'radius': 3}).getInfo())\n\n# Output weights matrix (up to 1/1000 precision for brevity)\n\n# [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]\n# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n# [0.034, 0.034, 0.034, 0.034, 0.034, 0.034, 0.034]\n# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n# [0.000, 0.034, 0.034, 0.034, 0.034, 0.034, 0.000]\n# [0.000, 0.000, 0.000, 0.034, 0.000, 0.000, 0.000]\n```"]]
