TechOverflow Logo
TechOverflow

如何使用 picamera2 捕获 Raspberry Pi HQ 摄像头 (IMX477) 高分辨率图像

English Deutsch 简体中文

以下代码将从使用 IMX477 传感器的 Raspberry Pi HQ 摄像头捕获单个 4056x3056px 图像到文件或 numpy 数组。这是该摄像头支持的最大分辨率。

捕获到文件

这将捕获单个帧到 CameraTest.png。PNG 文件会相当大，约 15-25 兆字节。

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

with picamera2.Picamera2() as camera:
    # Create high resolution still capture config
    camera_config = camera.create_still_configuration({"size":(4056, 3040)})
    camera.configure(camera_config)
    # Start camera with config
    camera.start()
    # Capture a single frame to CameraTest.png
    camera.capture_file("CameraTest.png")

捕获到 numpy 数组

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

with picamera2.Picamera2() as camera:
    # Create high resolution still capture config
    camera_config = camera.create_still_configuration({"size":(4056, 3040)})
    camera.configure(camera_config)
    # Start capture
    camera.start()
    array = camera.capture_array("main")
    # TODO Do something with [array]
    print(array.shape)

示例输出：

picamera2_capture_example_output.txt
[0:55:52.878964095] [5768]  INFO Camera camera_manager.cpp:297 libcamera v0.0.5+83-bde9b04f
[0:55:52.913906171] [5769]  INFO RPI vc4.cpp:437 Registered camera /base/soc/i2c0mux/i2c@1/imx477@1a to Unicam device /dev/media3 and ISP device /dev/media0
[0:55:52.913998855] [5769]  INFO RPI pipeline_base.cpp:1101 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'
[0:55:52.921056014] [5768]  INFO Camera camera.cpp:1033 configuring streams: (0) 4056x3040-BGR888 (1) 4056x3040-SBGGR12_CSI2P
[0:55:52.922090144] [5769]  INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1/imx477@1a - Selected sensor format: 4056x3040-SBGGR12_1X12 - Selected unicam format: 4056x3040-pBCC
(3040, 4056, 3)

注意 NumPy 数组与 Python OpenCV 函数兼容。

Check out similar posts by category: Python, Raspberry Pi