如何使用 picamera2 以固定曝光时间捕获高分辨率图像

此脚本将从 Raspberry Pi HQ 摄像头捕获单个摄像头帧，其最大分辨率为 4056x3040px，固定曝光时间为 10.0ms（似乎是 IMX477 传感器能够实现的最小曝光时间），固定模拟增益为 1.0。生成的图像保存到 Exposure10ms.png

capture_exposure_10ms.py

#!/usr/bin/env python3
import time
import picamera2
import numpy as np

with picamera2.Picamera2() as camera:
    camera_config = camera.create_still_configuration({"size":(4056, 3040)})
    camera.configure(camera_config)
    camera.set_controls({"ExposureTime": 10000, "AnalogueGain": 1.0})
    camera.start()
    camera.capture_file("Exposure10ms.png")
    camera.stop()

#!/usr/bin/env python3
import time
import picamera2
import numpy as np

with picamera2.Picamera2() as camera:
    camera_config = camera.create_still_configuration({"size":(4056, 3040)})
    camera.configure(camera_config)
    camera.set_controls({"ExposureTime": 10000, "AnalogueGain": 1.0})
    camera.start()
    camera.capture_file("Exposure10ms.png")
    camera.stop()

似乎在 camera.configure() 之后使用 camera.set_control() 很重要。

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