Tomasz Czarnecki

Application of augmented reality to the industrial systems for signalisation of emergency situations

One of the important measures to prevent undesired events consists in informing a machine operator about the appearance of a hazardous situation quickly and effectively enough. In order to conduct the investigations into possibilities of application of the Augmented Reality systems assigned for drawing the operators attention to the hazards appearing at the workstation, two special test stands have been developed. For that purpose special glasses applying commonly available safety glasses have been designed for generation of warning signals. Red luminescent diodes were employed for generation of virtual images formed by means of diaphragms, which shaped it and supplied with additional inscriptions. The initial perception tests of the warning signals generated using the AG technique that were performed have proved that these signals can successfully serve as a warning to the machine or device operator against an impending hazardous event.

Optoelectronic systems for automatic vehicle counting and classification in rest areas

The following paper depicts an architectural layout and operational insights towards an optoelectronic system dedicated for vehicle counting and classification, designed to monitor occupancy of rest areas. The system is based upon an image cue acquisition by video cameras and advanced signal processing mechanism. In order to satisfy the appropriate realization of measurement procedure (counting and classification), a specific measurement configuration scheme alongside optimized video stream capturing parameters were set up. Concerning signal processing methods, the most effective and appropriate for the purpose of vehicle counting and classification were selected. Moreover, the article presents the outcomes of the designed measurement campaign conducted on the S7 expressway within the agenda of the National Center for Research and Development RID project. The results obtained with use of the designed methodology were compared to the outcomes of the manual method.

A hybrid system for an on-site automatic vehicle counting and classification

In the following paper authors present a novel solution to a task of an automatic vehicle counting and classification. The depicted, hybrid system is composed of a set of remote measurement units alongside a central computing node connected in a network. The developed software package deployed within this system is based on a digital video processing algorithms and contemporary neural network algorithms, for vehicle detection and detected object classification, respectively. Conducted measurements depict the performance of the designed system with respect to the agenda of the National Center for Research and Development RID project.

Experimental verification of distributed temperature sensor model based on spontaneous Raman scattering

Mathematical model of distributed temperature sensor based on spontaneous Raman scattering is described in this paper. The concept uses Stokes and anti-Stokes scattered signals as reference and detection signals respectively. Model is completed by experimental results coming from setup of 200 m G.652 sensing fiber tested in temperatures 3°C, 15°C, 23 °C and 30°C and 2500 m reference fiber preserved in 22°C. Parameters of the scattered signal source in used setup configuration allow to achieve distributed temperature profile with spatial resolution up to 50 m.

New atmospheric visibility optical sensor based on correlation coding method

In this article a new atmospheric visibility sensor design is presented. It employs an empirical link between acquired lidar backscattered signals and atmospheric visibility parameter. In particular, received backscattered beam is under the autocorrelation analysis within the defined correlation distance, thus the outcome of this procedure presents the overall characteristic of the correlation coefficients, as a function of examined space range. Specifically, significant points of interest of this characteristic are then extracted and processed in order to evaluate the atmospheric visibility parameter. In various experimental demo campaigns, under varying weather conditions, performance of the designed device was assessed. It is reported, the approximate range of reliable atmospheric visibility parameter evaluation falls into the interval of 100 to 1400 m.

Employment of Voice Band Modems in Subscriber Loop Qualification

This letter presents the method useful in subscriber line qualification for asymmetric digital subscriber line service. It is based on the results of the line frequency response measurement in the voice band by V.34 modems. The response is related to the line attenuation at 300 kHz. The measurement results are also presented.

Aurometer: the fog and rain detector for visibility measurements

The paper contains the description of an instrument called Aurometer designed for measurements of visibility and precipitation. The instrument is based on forward scattering method. Some results of measurements are also given.

The influence of vector filtering on the matching precision of stereo images

Abstract The problem of points matching in colour stereo images is investigated. The correlation method is applied to the areas around the points being matched. The influence of noise on the matching errors and the error reduction by vector filters are analysed. The obtained results indicate that only few of several analysed filters are suitable for the precision increase. One of these filters is an impulse noise filter designed by the present authors.