commit a406877bfc48cc55ca1597962ad6b4a6caced406
Author: Jens Ahrensfeld <jens@jayfield.org>
Date:   Mon Jul 15 10:29:08 2024 +0200

    Initial commit

diff --git a/README.md b/README.md
new file mode 100755
index 0000000..e69de29
diff --git a/ocv_rpicam.py b/ocv_rpicam.py
new file mode 100755
index 0000000..6385405
--- /dev/null
+++ b/ocv_rpicam.py
@@ -0,0 +1,173 @@
+#!/usr/bin/env python3
+from typing import Union, overload
+from picamera2 import Picamera2
+from pprint import pprint
+import json
+import cv2
+#import numpy as np
+#import argparse
+#import sys
+#import csv
+#import matplotlib.pyplot as plt
+
+items = [
+    "ColourCorrectionMatrix",
+    "Saturation",
+    "Contrast",
+    "Sharpness",
+    "Brightness",
+    "NoiseReductionMode",
+    "AeEnable",
+    "AeMeteringMode",
+    "AeConstraintMode",
+    "AeExposureMode",
+    "AwbEnable",
+    "AwbMode",
+    "ExposureValue",
+    "ExposureTime",
+    "AnalogueGain",
+    "ColourGains",
+    "ScalerCrop",
+    "FrameDurationLimits",
+    "FrameRate"
+]
+
+picam2 = Picamera2()
+pprint(picam2.sensor_modes)
+settings = {'NoiseReductionMode': 0, 'AeExposureMode': 0, 'ExposureTime': 10000, 'AnalogueGain': 1, 'FrameRate': picam2.sensor_modes[0]['fps']}
+caps = {"FrameRate": (1, picam2.sensor_modes[0]['fps'], None)}
+
+def load_settings():
+    _result = None
+    try:
+        with open("settings.json", "r") as fp:
+            _result = json.load(fp)
+    except Exception:
+        pass
+
+    return _result
+
+def save_settings(_settings):
+    with open("settings.json", "w") as fp:
+        json.dump(_settings, fp, indent=0)
+
+def apply_settings(_settings):
+    for item in _settings:
+        c = caps[item]
+        value = _settings[item]
+        if value < c[0] or value > c[1]:
+            raise Exception(f"Invalid Value for {item}")
+
+        picam2.set_controls({item: value})
+
+def set_value(item: str, value):
+    clamped_value = value
+    c = caps[item]
+    clamped_value = max(c[0], min(c[1], value))
+    picam2.set_controls({item: clamped_value})
+    settings[item] = clamped_value
+
+    return clamped_value
+
+   
+def get_value(item: str):
+    return picam2.camera_controls[item]
+    
+if __name__ == '__main__':
+    for item in items:
+        try:
+            caps[item] = picam2.camera_controls[item]
+        except KeyError:
+            print(f"{item}: Not implemented")
+
+    # Config
+    camera_config = picam2.create_preview_configuration({'size': picam2.sensor_modes[0]['size']})
+    camera_config = picam2.create_preview_configuration({'size': (800, 600)})
+    picam2.configure(camera_config)
+
+
+    settings |= load_settings()
+    shutter = settings['ExposureTime']
+    gain = settings['AnalogueGain']
+    fps = settings['FrameRate']
+    apply_settings(settings)
+
+    pprint(f"Capabilities: {caps}")
+    pprint(f"Settings: {settings}")
+    pprint(f"Camera config: {picam2.camera_configuration()}")
+
+    # Start
+    picam2.start()
+    
+    while True:
+        rgb = picam2.capture_array("main")
+        frame = cv2.cvtColor(rgb, cv2.COLOR_RGB2BGR)
+
+        # Process the frame using OpenCV operations
+        cv2.imshow('Frame', frame)
+
+        # Exit the loop on pressing 'q'
+        key = cv2.pollKey() & 0xFF
+        if key == ord('q'):
+            break
+        elif key == ord('w'):
+            shutter -= 1000
+            shutter = set_value('ExposureTime', shutter)
+            print(f"Shutter: {shutter}")
+        elif key == ord('s'):
+            shutter -= 100
+            shutter = set_value('ExposureTime', shutter)
+            print(f"Shutter: {shutter}")
+        elif key == ord('x'):
+            shutter -= 1
+            shutter = set_value('ExposureTime', shutter)
+            print(f"Shutter: {shutter}")
+        elif key == ord('e'):
+            shutter += 1000
+            shutter = set_value('ExposureTime', shutter)
+            print(f"Shutter: {shutter}")
+        elif key == ord('d'):
+            shutter += 100
+            shutter = set_value('ExposureTime', shutter)
+            print(f"Shutter: {shutter}")
+        elif key == ord('c'):
+            shutter += 1
+            shutter = set_value('ExposureTime', shutter)
+            print(f"Shutter: {shutter}")
+        elif key == ord('h'):
+            gain -= 1
+            gain = set_value('AnalogueGain', gain)
+            print(f"Gain: {gain}")
+        elif key == ord('j'):
+            gain += 1
+            gain = set_value('AnalogueGain', gain)
+            print(f"Gain: {gain}")
+        elif key == ord('r'):
+            fps -= 1
+            fps = set_value('FrameRate', fps)
+            print(f"FPS: {fps}")
+        elif key == ord('f'):
+            fps -= 0.1
+            fps = set_value('FrameRate', fps)
+            print(f"FPS: {fps}")
+        elif key == ord('v'):
+            fps -= 0.01
+            fps = set_value('FrameRate', fps)
+            print(f"FPS: {fps}")
+        elif key == ord('t'):
+            fps += 1
+            fps = set_value('FrameRate', fps)
+            print(f"FPS: {fps}")
+        elif key == ord('g'):
+            fps += 0.1
+            fps = set_value('FrameRate', fps)
+            print(f"FPS: {fps}")
+        elif key == ord('b'):
+            fps += 0.01
+            fps = set_value('FrameRate', fps)
+            print(f"FPS: {fps}")
+
+            
+    # Release the capture and close windows
+    save_settings(settings)
+    cv2.destroyAllWindows()
diff --git a/settings.json b/settings.json
new file mode 100755
index 0000000..17fabfb
--- /dev/null
+++ b/settings.json
@@ -0,0 +1,7 @@
+{
+"NoiseReductionMode": 0,
+"AeExposureMode": 0,
+"ExposureTime": 19029,
+"AnalogueGain": 1,
+"FrameRate": 25.000000000000007
+}
\ No newline at end of file