ee.Number.byte

入力値を符号なし 8 ビット整数にキャストします。

用途	戻り値
Number.byte()	数値

引数	タイプ	詳細
これ: input	数値	入力値。

例

コードエディタ（JavaScript）

// Cast a number to unsigned 8-bit integer: [0, 255].
var number = ee.Number(100);
print('Number:', number);

var byteNumber = number.byte();
print('Number cast to byte:', byteNumber);


/**
 * Casting numbers to byte that are outside of its range and precision can
 * modify the resulting value, note the behavior of the following scenarios.
 */

// A floating point number cast to byte loses decimal precision.
var float = ee.Number(1.7);
print('Floating point value:', float);

var floatToByte = float.byte();
print('Floating point value cast to byte:', floatToByte);

// A number greater than byte range max cast to byte becomes byte range max.
var BYTE_MAX = 255;
var outOfRangeHi = ee.Number(BYTE_MAX + 12345);
print('Greater than byte max:', outOfRangeHi);

var outOfRangeHiToByte = outOfRangeHi.byte();
print('Greater than byte max cast to byte becomes byte max:', outOfRangeHiToByte);

// A number greater than byte range min cast to byte becomes byte range min.
var BYTE_MIN = 0;
var outOfRangeLo = ee.Number(BYTE_MIN - 12345);
print('Less than byte min:', outOfRangeLo);

var outOfRangeLoToByte = outOfRangeLo.byte();
print('Less than byte min cast to byte becomes byte min:', outOfRangeLoToByte);

Python の設定

Python API とインタラクティブな開発での geemap の使用については、 Python 環境のページをご覧ください。

import ee
import geemap.core as geemap

Colab（Python）

# Cast a number to unsigned 8-bit integer: [0, 255].
number = ee.Number(100)
print('Number:', number.getInfo())

byte_number = number.byte()
print('Number cast to byte:', byte_number.getInfo())


"""Casting numbers to byte that are outside of its range and precision can
modify the resulting value, note the behavior of the following scenarios.
"""

# A floating point number cast to byte loses decimal precision.
float_number = ee.Number(1.7)
print('Floating point value:', float_number.getInfo())

float_to_byte = float_number.byte()
print('Floating point value cast to byte:', float_to_byte.getInfo())

# A number greater than byte range max cast to byte becomes byte range max.
BYTE_MAX = 255
out_of_range_hi = ee.Number(BYTE_MAX + 12345)
print('Greater than byte max:', out_of_range_hi.getInfo())

out_of_range_hi_to_byte = out_of_range_hi.byte()
print('Greater than byte max cast to byte becomes byte max:',
      out_of_range_hi_to_byte.getInfo())

# A number greater than byte range min cast to byte becomes byte range min.
BYTE_MIN = 0
out_of_range_lo = ee.Number(BYTE_MIN - 12345)
print('Less than byte min:', out_of_range_lo.getInfo())

out_of_range_lo_to_byte = out_of_range_lo.byte()
print('Less than byte min cast to byte becomes byte min:',
      out_of_range_lo_to_byte.getInfo())