Author(s):
1. Biljana Djordjevic, Masinski fakultet, Serbia
2. Boban Andjelković, Univerzitet u Nišu, Mašinski fakultet, Serbia
3. Natasa Zdravkovic, Serbia

Abstract:
The functioning of the mechatronic systems demands precise registering of processes, phenomenon or objects. The necessary data are easily obtained by using cameras. In most cases, end results usually do not have satisfactory quality, due to their realisation under unfavorable circumstances. In order to improve their quality, many techniques have been developed. Each of those techniques is developed with purpose to solve a very specific type of a problem. Especially important is the technique based on application of nonlinear filtering, because it gives results usable in real conditions. In the class of nonlinear filtering techniques, homomorphic filtering is the most interesting one. In this work, the described tecnique is the homomorphic filtering, applied to improve image quality. Also, automatic evaluation of the contrast coefficient is taken into consideration. The impact of the contrast coefficient with homomorphic filtering onto quality of the processed image is very important, and its value depends on the environment conditions under which the image is formed. Based on previously done analysis, a functional dependency of the bimodal image histogram contrast coefficients is assumed, an algorithm is formed and testing on concrete examples. The whole purpose of this coefficient evaluation is to automatise the image quality process.

Key words:
Homomorphic filtering,automatic coefficient contrast determination based on bimodal digital image histogram,image quality improvement

Thematic field:
Mechatronics

Date of abstract submission:
27.02.2017.

Conference:
13th International Conference on Accomplishments in Mechanical and Industrial Engineering

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