Wybrane metody poprawy jakości obrazów i sekwencji wideo

Abstract

The article attempts to present the methods and opportunities to improve the quality of images and video footages. Three main groups of methods used for this purpose were described, i.e. geometric transformations, point transformations and filtering. In order to present the capabilities and limitations of various research methods, the author applied them in a number of experiments, involving the use of digital materials (photographs and video sequences), prepared under the conditions resembling as nearly as possible actual casework. The digital files were registered with the use of three recording devices: mobile phone, digital camcorder and a professional camera. Research methods tested during the study have contributed to minimizing the noise in the registered materials, which led, inter alia, to the successful reading of the vehicle’s license plate numbers. Based on the experiments carried out, three main groups of factors having an impact on improving image or video footage quality were indicated, including technical parameters of the test material and recording device as well as the human factor.