Freaks City

MATLAB Function for Pyramid-Based LK Optical Flow This article presents a complete MATLAB implementation of the Lucas-Kanade (LK) optical flow algorithm using a pyramidal (coarse-to-fine) approach. The function estimates the apparent motion vector field between two successive grayscale image frames. Main Algorithm Function function [flowX, flow ...

Core MATLAB Syntax MATLAB primarily utilizes .m files for script execution. The development environment features workspace (left), editor (right), and output (bottom-right) panes. Basic Input and Output radius = input('Enter circle radius: '); area = pi * radius^2; fprintf('Area = %.2f\n', area); This script calculates circle area using input ...

Normalizing Sampling Frequencies In signal processing appplications, it is frequently necessary to compare data sets that possess different sampling rates or durations. For instance, matching a live audio stream against a database of stored templates requires normalization, as stored data is often downsampled to conserve memory. Direct subtract ...

Edge detection is a fundamental technique in digital image processing, designed to isolate the boundaries of objects within a scene. These boundaries typically correspond to regions where significant fluctuations in pixel intensity or color occur, providing critical information for object recognition, structural analysis, and texture categoriza ...

Managing Application State in UI Components Callback functions define UI component behavior in MATLAB applications. When components have interdependencies, callbacks often require access to data defined in the main application function or need to exchange information with other callbacks. Since each calback operates in its own scope, explicit d ...

1. Methodology Overview The wavelet feature extraction pipeline for mechanical vibration signals follows a multi-scale decomposition → feature quantification → feature fusion workflow, consisting of these core stages: Wavelet Decomposition: Multi-level decomposition to capture frequency band characteristics Time-Frequency Analysis: Extraction ...

Start by loading the data from an Excel file named data.xlsx containing a single numeric column Value. The code splits the series into an 80% training segment and reserves the remainder for testing. % Clear workspace and figures clc; clear; close all; % Control parameters forceManual = 1; % 1 = use fixed ARIMA(2,1,1); 0 = auto-order selec ...

This article provides a simulation environment for modeling laser beams hitting object surfaces and the ground. Users can configure the laser range, resolution, object position, size, and rotation. Recently, we needed to analyze occlusions caused by objects in a laser scanner's background. Unable to find a suitable environment, we built one in ...