DOI: https://doi.org/10.20535/kpi-sn.2019.4.174381

THE IMAGE PREPROCESSING METHOD FOR FACE DETECTION PROBLEMS

Mykola V. Voloshyn

Abstract


Background. Today there are dozens of methods and approaches for facial recognition. In recent years there were achieved more or less acceptable results in object localization, but object identification is still an open problem for achieving high reliability of the correct person identification. It depends on collecting initial data very much. Therefore, there is a need for image preprocessing, which will help to improve the reliability of existing image recognition methods and computer vision approaches by manipulating the input signal.

Objective. The purpose of the paper is to search and analyze effective image processing techniques based on key points of the face. Performing experiments on the proposed image preprocessing method and comparing the results of experiments with and without such processing.

Methods. The purpose was achieved by analyzing the known identification methods that were used in criminalistics for the last decades and also by the image transformation based on the object's key points with the use of the image normalization approach based on the geometric parameters in computer vision issues.

Results. There are the results of studies of various methods of learning and recognition in this research. The time values of training and recognition with and without the proposed image preprocessing method are analyzed. It is shown that by using this image preprocessing method it can achieve better results of object identification.

Conclusions. The developed face anthropometric points localisation methods differ from the existing ones by the ability to find key features on low-contrast images with a complex background in real time without prior training and adjustment. The developed image preprocessing method allows improving the reliability of existing recognition methods by the image normalization based on the face key features.

Keywords


Computer vision; Image processing; Identification; Recognition

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