公告：凡是在
2025 年 4 月 15 日前註冊使用 Earth Engine 的非商業專案，都必須
驗證非商業用途資格，才能繼續存取 Earth Engine。
ee.Array.bitCount
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
以元素為單位，計算輸入的 64 位元二補數二進位表示法中的 1 位元數。
範例
程式碼編輯器 (JavaScript)
print(ee.Array([], ee.PixelType.int8()).bitCount()); // []
print(ee.Array([0]).bitCount()); // [0]
print(ee.Array([1]).bitCount()); // [1]
print(ee.Array([2]).bitCount()); // [1]
print(ee.Array([3]).bitCount()); // [2]
print(ee.Array([0xFFFF]).bitCount()); // [16]
print(ee.Array([1, 2, 3]).bitCount()); // [1,1,2]
print(ee.Array([[0, 1], [6, 13]]).bitCount()); // [[0,1],[2,3]]
// https://en.wikipedia.org/wiki/Two's_complement signed values.
print(ee.Array([-1]).bitCount()); // [64]
print(ee.Array([-1], ee.PixelType.int8()).bitCount()); // [64]
print(ee.Array([-2]).bitCount()); // [63]
Python 設定
請參閱
Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。
import ee
import geemap.core as geemap
Colab (Python)
display(ee.Array([], ee.PixelType.int8()).bitCount()) # []
display(ee.Array([0]).bitCount()) # [0]
display(ee.Array([1]).bitCount()) # [1]
display(ee.Array([2]).bitCount()) # [1]
display(ee.Array([3]).bitCount()) # [2]
display(ee.Array([0xFFFF]).bitCount()) # [16]
display(ee.Array([1, 2, 3]).bitCount()) # [1, 1, 2]
display(ee.Array([[0, 1], [6, 13]]).bitCount()) # [[0, 1], [2, 3]]
# https://en.wikipedia.org/wiki/Two's_complement signed values.
display(ee.Array([-1]).bitCount()) # [64]
display(ee.Array([-1], ee.PixelType.int8()).bitCount()) # [64]
display(ee.Array([-2]).bitCount()) # [63]
除非另有註明，否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權，程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間：2025-07-27 (世界標準時間)。
[null,null,["上次更新時間：2025-07-27 (世界標準時間)。"],[[["\u003cp\u003e\u003ccode\u003eArray.bitCount()\u003c/code\u003e calculates the number of 1s in the binary representation of each element in an array.\u003c/p\u003e\n"],["\u003cp\u003eIt operates on 64-bit two's complement binary representation, supporting both positive and negative integers.\u003c/p\u003e\n"],["\u003cp\u003eThe function returns an array with the same dimensions as the input, where each element represents the bit count of the corresponding input element.\u003c/p\u003e\n"],["\u003cp\u003eThis method works for arrays of various data types, including int8, int16, int32, and int64.\u003c/p\u003e\n"],["\u003cp\u003eIt handles empty arrays, single-element arrays, multi-dimensional arrays, and arrays with both positive and negative numbers.\u003c/p\u003e\n"]]],["The `bitCount()` function calculates the number of one-bits in the 64-bit two's complement binary representation of each element in an input array. It operates element-wise and returns a new array with the same shape as the input. The input array can contain positive or negative integers, and the output array provides the one-bit count for each corresponding element. For example, `ee.Array([1, 2, 3]).bitCount()` returns `[1, 1, 2]`.\n"],null,["# ee.Array.bitCount\n\nOn an element-wise basis, calculates the number of one-bits in the 64-bit two's complement binary representation of the input.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------|---------|\n| Array.bitCount`()` | Array |\n\n| Argument | Type | Details |\n|---------------|-------|------------------|\n| this: `input` | Array | The input array. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint(ee.Array([], ee.PixelType.int8()).bitCount()); // []\n\nprint(ee.Array([0]).bitCount()); // [0]\nprint(ee.Array([1]).bitCount()); // [1]\nprint(ee.Array([2]).bitCount()); // [1]\nprint(ee.Array([3]).bitCount()); // [2]\nprint(ee.Array([0xFFFF]).bitCount()); // [16]\nprint(ee.Array([1, 2, 3]).bitCount()); // [1,1,2]\n\nprint(ee.Array([[0, 1], [6, 13]]).bitCount()); // [[0,1],[2,3]]\n\n// https://en.wikipedia.org/wiki/Two's_complement signed values.\nprint(ee.Array([-1]).bitCount()); // [64]\nprint(ee.Array([-1], ee.PixelType.int8()).bitCount()); // [64]\nprint(ee.Array([-2]).bitCount()); // [63]\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\ndisplay(ee.Array([], ee.PixelType.int8()).bitCount()) # []\n\ndisplay(ee.Array([0]).bitCount()) # [0]\ndisplay(ee.Array([1]).bitCount()) # [1]\ndisplay(ee.Array([2]).bitCount()) # [1]\ndisplay(ee.Array([3]).bitCount()) # [2]\ndisplay(ee.Array([0xFFFF]).bitCount()) # [16]\ndisplay(ee.Array([1, 2, 3]).bitCount()) # [1, 1, 2]\n\ndisplay(ee.Array([[0, 1], [6, 13]]).bitCount()) # [[0, 1], [2, 3]]\n\n# https://en.wikipedia.org/wiki/Two's_complement signed values.\ndisplay(ee.Array([-1]).bitCount()) # [64]\ndisplay(ee.Array([-1], ee.PixelType.int8()).bitCount()) # [64]\ndisplay(ee.Array([-2]).bitCount()) # [63]\n```"]]
