ee.Number.byte

Truyền giá trị đầu vào thành số nguyên 8 bit không dấu.

Cách sử dụng	Giá trị trả về
Number.byte()	Số

Đối số	Loại	Thông tin chi tiết
this: input	Số	Giá trị đầu vào.

Ví dụ

Trình soạn thảo mã (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);

Thiết lập Python

Hãy xem trang Môi trường Python để biết thông tin về API Python và cách sử dụng geemap cho quá trình phát triển tương tác.

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())