Geometric Correction of Projected Rectangular Pictures

Geometric and Photometric Correction of Projected Rectangular Pictures

This article presents a method for removing geometric distortions in taken images of rectangular planar patterns (such as maps, pictures, or posters) in the absence of any calibration information or explicit knowledge of the imaging device. Our approach removes lens distortion form single-view images. The method is based on Least-Square-Error (LSE) approximations and Hough transforms. We approx...

Monitoring and Correction of Geometric Distortion in Projected Displays

Some Physical Properties of Full-Ripe Banana Fruit (Cavendish variety)

Physical properties of fruits and vegetables are the subject of many researches because of its importance in designing of agricultural machinery. Banana fruit is one of important fruit. In this study some physical properties of banana fruit (Cavendish variety) were determined. Properties which were measured included weight of whole fruit peel and pulp weight, dimensions, surface area and projec...

A study on effect of crack on free vibration of thick rectangular plate with initial geometric imperfection using differential quadrature method

In this study, vibration of initially imperfect cracked thick plate has been investigated using the differential quadrature method. The crack modeled as an open crack using a no-mass linear spring. The governing equations of vibration of a cracked plate are derived using the Mindlin theory and considering the effect of initial imperfection in Von-Karman equations. Differential equations are dis...

Geometric Correction for Projected Image on Patterned Screen

In recent years, projection device which has advanced its miniaturization and price reduction are attracted as display device against a backdrop of high needs for wide and high-definition screen. However, the expression of projector on non-special screen causes geometric problems of distorted expression caused by a surface shape of the screen and a positional relation among devices. To solve th...