vault backup: 2022-09-28 19:13:41

Affected files: .obsidian/workspace 03. Programming/COM/20210726 - COM Interface.md 03. Programming/DB/MySQL.md 03. Programming/DB/sqlite.md 03. Programming/Design Pattern.md 03. Programming/FFMPEG/00. Introduction.md 03. Programming/FFMPEG/01. Setup.md 03. Programming/FFMPEG/FFMpeg.md 03. Programming/Flask.md 03. Programming/Media Foundation/20210604 - Windows media foundation.md 03. Programming/OpenCV.md 03. Programming/OpenGL.md 03. Programming/Python/argparse.ArgumentParser.md 03. Programming/Python/decorator.md 03. Programming/Python/logging.md 03. Programming/Python/opencv.md 03. Programming/Python/subprocess.md 03. Programming/Python/threading.md 03. Programming/Python/tkinter.md 03. Programming/Python/檢測工具.md 03. Programming/QT/Dropdown button.md 03. Programming/QT/QVariant.md 03. Programming/QT/Qt.md 03. Programming/UML.md 03. Programming/演算法.md 04. 資料收集/99. templates/blogHeader.md 04. 資料收集/99. templates/date.md 04. 資料收集/99. templates/front matter.md 04. 資料收集/99. templates/note.md 04. 資料收集/99. templates/table.md 04. 資料收集/99. templates/thisWeek.md 04. 資料收集/99. templates/日記.md 04. 資料收集/99. templates/讀書筆記.md 04. 資料收集/Linux/CLI/cut.md 04. 資料收集/Linux/CLI/scp.md 04. 資料收集/Linux/CLI/timedatectl.md 04. 資料收集/Linux/Programming.md 04. 資料收集/Linux/Ubuntu.md 04. 資料收集/Tool Setup/Hardware/RaspberryPi.md 04. 資料收集/Tool Setup/Software/Chrome.md 04. 資料收集/Tool Setup/Software/Obisidian.md 04. 資料收集/Tool Setup/Software/SublimeText.md 04. 資料收集/Tool Setup/Software/VirtualBox.md 04. 資料收集/Tool Setup/Software/Visual Studio Code.md 04. 資料收集/Tool Setup/Software/Windows Setup.md 04. 資料收集/Tool Setup/Software/Windows Terminal.md 04. 資料收集/Tool Setup/Software/freefilesync.md 04. 資料收集/Tool Setup/Software/vim.md 04. 資料收集/名言佳句.md 04. 資料收集/架站/Gitea.md 04. 資料收集/架站/HTTP Server/Apache.md 04. 資料收集/架站/HTTP Server/Nginx/Reverse Proxy(Layer4).md 04. 資料收集/架站/Pelican blog.md 04. 資料收集/架站/Proxmox VE.md 04. 資料收集/架站/SWAG Reverse proxy.md 04. 資料收集/架站/Storj.md 04. 資料收集/架站/Trojan.md 04. 資料收集/每週外食.md 04. 資料收集/科技/802.11.md 04. 資料收集/科技/HDR Sensor.md 04. 資料收集/科技/量子電腦.md 04. 資料收集/科技/鋰電池.md 04. 資料收集/興趣嗜好/RC/Traxxas Sledge.md 04. 資料收集/興趣嗜好/RC/好盈電變調整中立點.md 04. 資料收集/興趣嗜好/RC/差速器調教教學.md 04. 資料收集/興趣嗜好/模型/舊化作例.md 04. 資料收集/興趣嗜好/軍武/虎式.md 04. 資料收集/讀書筆記/20201201 - 學習如何學習.md 04. 資料收集/讀書筆記/20201218 - Kotlin權威2.0.md 04. 資料收集/讀書筆記/20201224 - 寫作是最好的自我投資.md 04. 資料收集/讀書筆記/20210119 - 中產悲歌.md 04. 資料收集/讀書筆記/20210220 - 最高學習法.md 04. 資料收集/讀書筆記/20210320 - 最高學以致用法.md 04. 資料收集/讀書筆記/20210406 - 精準購買.md 04. 資料收集/讀書筆記/20210723 - 高手學習.md 04. 資料收集/讀書筆記/20220526 - 深入淺出設計模式.md 04. 資料收集/讀書筆記/20220619 - 精確的力量.md 04. 資料收集/軟體工具/IPFS.md 04. 資料收集/軟體工具/MkDocs.md 04. 資料收集/軟體工具/Obsidian.md 04. 資料收集/軟體工具/docker.md 04. 資料收集/軟體工具/git/apply.md 04. 資料收集/軟體工具/git/submodule.md 04. 資料收集/軟體工具/youtube-dl.md 04. 資料收集/面試準備/技术面试最后反问面试官的话.md
2022-09-28 19:13:41 +08:00
parent 0534f846d1
commit c847c7f07d
85 changed files with 7 additions and 7 deletions
--- a/Programming/Python/opencv.md
+++ b/Programming/Python/opencv.md
@@ -0,0 +1,61 @@
+### 將camera包裝成class
+```python
+class CameraCv(object):
+    def __init__(self, videoSource=0):
+        self.videoSource = videoSource
+        self.camera = None
+        self.cameraWidth = 0
+        self.cameraHeight = 0
+        self.cameraPreviewThreadHandle = None
+        self.cameraPreviewThreadStopEvent = threading.Event()
+        self.lastframeRGB = None
+        self.latestFrame = None
+
+    def start(self):
+        print("Open Camera")
+        self.camera = cv2.VideoCapture(self.videoSource, cv2.CAP_DSHOW)
+        if not self.camera.isOpened():
+            raise ValueError("Unable to open video source {}".format(self.videoSource))
+
+        # Get video source width and height
+        self.cameraWidth  = self.camera.get(cv2.CAP_PROP_FRAME_WIDTH)
+        self.cameraHeight = self.camera.get(cv2.CAP_PROP_FRAME_HEIGHT)
+
+        self.cameraPreviewThreadStopEvent.clear()
+        self.cameraPreviewThreadHandle = threading.Thread(target=self.collectFrame, daemon=True, args=())
+        self.cameraPreviewThreadHandle.start()
+
+    def stop(self):
+        print("Close Camera")
+        self.cameraPreviewThreadStopEvent.set()
+        if self.camera.isOpened():
+            self.camera.release()
+            cv2.destroyAllWindows()
+
+    def collectFrame(self):
+        while True:
+            ret, frame = self.camera.read()
+            if ret:
+                # Return a boolean success flag and the current frame converted to BGR
+                self.lastframeRGB = frame
+                self.latestFrame = ImageTk.PhotoImage(image=Image.fromarray(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)))
+
+            if self.cameraPreviewThreadStopEvent.is_set():
+                break
+
+            time.sleep(0.016)
+
+    def draw(self, container):
+        if self.latestFrame is not None:
+            container.imgtk = self.latestFrame
+            container.configure(image=self.latestFrame)
+
+    def read(self):
+        return self.camera.read()
+
+    def getLastFrameRgb(self):
+        return self.lastframeRGB
+
+    def saveFrame(self, filepath):
+        cv2.imwrite(filepath, self.getLastFrameRgb())
+```