Author: Vivian SiahaanPublisher: BALIGE PUBLISHING
ISBN:
Category : Computers
Languages : en
Pages : 132
Book Description
The first project, leveraging libraries like OpenCV, Pillow, imageio, and Matplotlib, offers a streamlined interface for analyzing RGB histograms from video files. The main window is initialized using the AnalyzeHistogramFrame class, where users interact with buttons, labels, and canvases. Upon loading a video file via the "Open Video" button, the open_video() method utilizes imageio to display the first frame in the GUI canvas. Playback controls such as "Play/Pause" and "Stop" manage the video's playback state, with the show_frame() method continuously updating the displayed frame. Users can engage with the frame by zooming with the mouse wheel or defining a region of interest (ROI) through click-and-drag actions. Upon releasing the mouse button, the analyze_histogram method extracts the ROI, displaying it alongside its RGB histogram in a separate window, courtesy of Matplotlib. The histogram analysis process involves plotting individual RGB channel histograms, combined into a unified histogram. These plots are converted into Tkinter-compatible images for seamless integration into the GUI, empowering users with a comprehensive tool for visualizing and exploring video frame data. The second project is a Python application built with Tkinter, a GUI library, to enable users to analyze RGB histograms of the filtered of cropped image of a certain frame. It combines several libraries like PIL, imageio, OpenCV, NumPy, and Matplotlib to provide a comprehensive interface and analytical capabilities. The application's structure revolves around a class named Filter_CroppedFrame, responsible for managing the GUI and functionalities. Initially, the script imports necessary libraries and defines the Filter_CroppedFrame class. This class initializes the main window, sets up attributes, and creates GUI elements such as buttons, comboboxes, and canvas for video display. Users can load video files using a file dialog, which triggers the open_video() method to load the video via imageio. Playback controls for play, pause, and stop are provided, managed by methods like play_video(), toggle_play_pause(), and stop_video(). The show_frame() method updates the displayed frame based on the playback state and zoom level. Interactive analysis is facilitated through user interactions like zooming and drawing bounding boxes, handled by methods such as on_mousewheel(), on_press(), on_drag(), and on_release(). After drawing a bounding box and releasing the mouse button, the analyze_histogram method is called to extract the cropped region, apply selected filters, and display the cropped image with its RGB histogram in a popup window. The application supports various filters like Gaussian, mean, median, bilateral, and wavelet transforms, applied via the apply_filter() method, with filter selection facilitated by GUI elements like comboboxes. The script concludes with a main function initializing the application by creating an instance of the Filter_CroppedFrame class and starting the main event loop, enabling seamless GUI responsiveness and analysis tasks execution. The third project centers around a GUI application designed to facilitate edge detection within cropped images sourced from video files. Developed using Tkinter, the application boasts an array of interactive elements such as buttons, labels, and comboboxes to enhance user experience and functionality. At its core, the Edges_CroppedFrame class governs the application's operations, initializing critical attributes and orchestrating the creation of graphical components. A key feature of the application lies in its robust handling of video files. Users can effortlessly load video files via a file dialog interface, leveraging the imageio library for efficient frame extraction. The seamless rendering of frames onto a Tkinter canvas forms the foundation of the GUI, allowing users to navigate frames, control video playback, and utilize zoom features through intuitive buttons and comboboxes. Central to the application's functionality is its capability for edge detection within defined regions of interest (ROIs) within frames. Leveraging the OpenCV library, the application seamlessly integrates various edge detection algorithms, including Canny, Sobel, Prewitt, Laplacian, Scharr, FreiChen, Roberts, Kirsch, and Robinson. Users can interactively select rectangular ROIs within frames using mouse-driven actions, with the application dynamically updating the displayed frame to showcase the selected ROI alongside its corresponding histogram. Furthermore, the application extends its utility by enabling concurrent processing of multiple videos. Users can spawn new instances of the application, facilitating comprehensive video analysis and edge detection tasks across different video files. This feature enhances versatility and scalability, catering to diverse user requirements and amplifying the application's utility for advanced video processing endeavors.
