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Page 1727 of 2547
Increase and decrease the brightness of an image in MATLAB
In an image, brightness is an attribute that is interpreted by our eyes based on the amount of light reflected by different regions of the image. Brightness is related to the intensity of light in the image i.e., if an image has more light it will appear brighter. If the image has less light, it will appear as darker. Therefore, brightness influences the visual quality of an image. However, we have various tools like MATLAB to adjust the brightness of the image and enhance its visual quality. In a digital image, the brightness is a controlled by pixel values of ...
Read MoreImplementation of Fourier Series up to \"n\" Harmonics in MATLAB
In mathematics, the Fourier series up to "n" harmonics is a technique used to approximate a periodic function through the sum of sine and cosine functions. We can implement the Fourier series up to "n" harmonics in MATLAB programming. Before discussing this implementation, let us first get an overview of Fourier series up to "n" harmonics. What is Fourier Series up to "n" Harmonics? In mathematics, the Fourier series is a method of expressing a periodic function as a sum of sinusoidal functions (sine and cosine functions). The Fourier series up to "n" harmonics is a way of approximating a ...
Read MoreImplementation of Cayley-Hamilton\'s Theorem in MATLAB
In linear algebra, there is a fundamental theorem caled Cayley-Hamilton’s Theorem that is used to establish a relation between a square matrix and its characteristic equation. Read this article to learn the implementation of the Cayley-Hamilton’s theorem in MATLAB programming. Let's start with an overview of Cayley-Hamilton’s theorem. What is Cayley-Hamilton’s Theorem? In linear algebra, the Cayley-Hamilton’s theorem is a fundamental theorem that is used to establish a relationship between a square matrix and its characteristic equation. In other words, according Cayley-Hamilton’s theorem, a square matrix must satisfy its own characteristic equation. Explanation Consider a square matrix A of the ...
Read MoreImage Sharpening Using Laplacian Filter and High Boost Filtering in MATLAB
In MATLAB, there are two commonly used image processing techniques namely, "Laplacian Filter" and "High Boost Filtering" that are used to sharpen an image. The Laplacian filter is mathematical operator used to sharpen an image in digital image processing. While, the high boost filtering is an image sharpening technique in digital image processing. In this tutorial, I will explain the process of image sharpening using Laplacian filter and high boost filtering in MATLAB. Let’s start with the basic introduction of Laplacian filter and high boost filtering. What is Laplacian Filter in MATLAB? In MATLAB, the Laplacian filter is mathematical tool ...
Read MoreHow to Swap Elements in a matrix Using MATLAB?
A matrix is a structure which is used to store and work with numeric data. Each value stored in a matrix is referred to as an element. Sometimes, we need to swap or change the position of these elements within the matrix. We can use MATLAB to perform this task i.e., swapping the elements of the matrix. In this tutorial, I will explain how we can use MATLAB to swap the elements in a matrix. Swap Elements in a Matrix MATLAB is a powerful tool that can be used to manipulate matrices. It provides various methods to swap the elements ...
Read MoreHow to Select Random Rows from a Matrix in MATLAB?
In MATLAB, we can perform various operations on matrices. One such operation is selecting random rows from a matrix. MATLAB provides several different methods of selecting random rows from a matrix. In this tutorial, I will explain different methods of selecting rows from a matrix randomly using MATLAB. Select Random Rows from a Matrix in MATALB In MATLAB, we have various built-in functions that can be used to randomly select rows from a matrix. The following are some commonly used functions to randomly select rows from a matrix − randperm() Function randsample() Function randi() Function datasample() Function Let ...
Read MoreHow to Round toward Negative Infinity in MATLAB?
Rounding toward negative infinity is a method of rounding a number "N" down to the nearest integer less than or equal to the number "N". This method is also called "flooring". In simple words, rounding a number toward negative infinity is a method of finding the largest integer number which is less than or equal to the given number. For example, consider a number 4.8, when this number is round to negative infinity. Then, it will become 4. This is because, 4 is the largest integer number less than or equal to 4.8. Similarly, if we have a negative ...
Read MoreCheck if a path exists for a cell valued 1 to reach the bottom right corner of a Matrix before any cell valued 2
Problems involving grids and matrices are mostly solved using either BFS or DFS traversal algorithms. Taking a look into the first one, Breadth First Traversal − BFS or Breadth First Traversal is an algorithm for searching a tree or a graph data structure. It starts at the root node and explores all the nodes at the present level before moving on to the next level. Algorithm procedure BFS(G, root) is let Q be a queue label root as explored Q.enqueue(root) while Q is not empty do ...
Read MoreReduce the array to a single element by repeatedly removing an element from any increasing pair
Reducing an array to a single element by repeatedly removing element is done by the following criteria − Select indices i and j such that i < j and arr[i] < arr[j] and convert one of the two elements to 0. Problem Statement Given an array arr[] containing positive integers. Find if the array can be reduced to a single element by repeatedly removing an element from any increasing pair. If possible return true along with the indices chosen and the index of the element that is removed. Sample Example 1 Input arr[] = {5, 7, 10, 2, 4, ...
Read MoreNth term of given recurrence relation having each term equal to the product of previous K terms
Recurrence Relation − In mathematics, recurrence relation refers to an equation where the nth term of the sequence is equal to some combination of the previous terms. For a recurrence relation where each term equals the product of previous K terms, let’s define N and K along with an array arr[] containing the first K terms of the relation. Thus, the nth term is given by − $$\mathrm{F_N= F_{N−1} ∗ F_{N−2} ∗ F_{N−3} ∗ . . .∗ F_{N−K}}$$ Problem Statement Given two positive integers N and K and an array of integers containing K positive integers. Find the Nth term ...
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