python - 如何将 24 帧编码为一张 24 位 RGB 图像？

Question

我想添加 Blender 对光场显示设备的支持。显示器与标准 HDMI 电缆的工作方式是视频的每个 24 位 RGB 帧存储 24 个单色帧。显示器在接收到这些帧时将其分割。这是一个例子:

当然，要实现此功能，必须首先将单色帧正确编码到单个 24 位 RGB 图像中。 PIL、Pillow 或其他 Python 库可以允许执行此操作吗？

Answer 1

不是生产质量，但可能足以让你开始，我认为它一定是这样的:

#!/usr/bin/env python3

from PIL import Image
import numpy as np

w, h = 192, 192

# Create RGB output array h, w, 3
out = np.zeros((h,w,3),dtype=np.uint8)

file = 1
# Iterate over 3 channels, Red, Green and Blue- or maybe B, G, R
for channel in range(3):
    # Iterate over the 8 bits in each channel
    for bitpos in range(8): 
        filename = f"{file}.png"
        print(f"Opening {filename} as bit {bitpos} of channel {channel}")
        im = Image.open(filename).convert('L') 

        # Convert to Numpy image with range 0..1
        ni = (np.array(im)/255).astype(np.uint8)

        # Shift and stuff into output array
        out[...,2-channel] |= ni << (bitpos) 
        file += 1

result = Image.fromarray(out)
result.save('result.png')

示例输出

Opening 1.png as bit 0 of channel 0
Opening 2.png as bit 1 of channel 0
Opening 3.png as bit 2 of channel 0
Opening 4.png as bit 3 of channel 0
Opening 5.png as bit 4 of channel 0
Opening 6.png as bit 5 of channel 0
Opening 7.png as bit 6 of channel 0
Opening 8.png as bit 7 of channel 0
Opening 9.png as bit 0 of channel 1
Opening 10.png as bit 1 of channel 1
Opening 11.png as bit 2 of channel 1
Opening 12.png as bit 3 of channel 1
Opening 13.png as bit 4 of channel 1
Opening 14.png as bit 5 of channel 1
Opening 15.png as bit 6 of channel 1
Opening 16.png as bit 7 of channel 1
Opening 17.png as bit 0 of channel 2
Opening 18.png as bit 1 of channel 2
Opening 19.png as bit 2 of channel 2
Opening 20.png as bit 3 of channel 2
Opening 21.png as bit 4 of channel 2
Opening 22.png as bit 5 of channel 2
Opening 23.png as bit 6 of channel 2
Opening 24.png as bit 7 of channel 2