使用OpenImageIO和Python将sRGB图像转换为灰度图像

import OpenImageIO as oiio

# 读取sRGB图像
input_image = oiio.ImageInput.open("input_image.jpg")
spec = input_image.spec()
width = spec.width
height = spec.height
channels = spec.nchannels

# 创建灰度图像
output_image = oiio.ImageOutput.create("output_image.jpg")
output_spec = oiio.ImageSpec(width, height, 1, oiio.TypeDesc.UINT8)

# 转换为灰度图像
for y in range(height):
    for x in range(width):
        pixel = input_image.read_pixel(x, y)
        gray_value = 0.2126 * pixel[0] + 0.7152 * pixel[1] + 0.0722 * pixel[2]
        output_image.write_pixel(x, y, [gray_value])

# 关闭图像文件
input_image.close()
output_image.close()