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Over the last decades, several studies have demonstrated the reflectance effectiveness of middle wave infrared (MWIR) for discriminating among different types of vegetation, and estimating the total and leaf biomass of several forest ecosystems. Therefore, a MWIR aerial image capturing system for vegetation observation is urgently required. Furthermore, stitching those MWIR aerial images together...
Many industrial applications require to determine the absolute position of an extended surface without modifying or touching the target object. This contribution presents a concept for an optical absolute position sensor based on an off the shelf camera, operating perpendicular to an extended surface over long strokes, as necessary e.g. for piston actuators. The proposed sensor uses a Particle Filter...
Underground construction projects require accurate techniques for machine guidance control. This paper presents an advanced design of a fully integrated active laser target (ALT), which is employed as an optical displacement and orientation sensor. The instrument is mounted on a tunnel boring machine (TBM) and delivers the TBM's pitch and yaw angles to a remote host system. The optical arrangement...
In machine vision applications, Time-of-Flight (TOF) sensors like the Photonic Mixer Devices (PMD) became considerable alternatives to common 3D sensing devices. Because of the enormous progress in TOF-vision systems, nowadays 3D matrix cameras can be used for many applications such as robotic, automotive, industrial, medical and multimedia applications. This paper focuses on the use of ToF cameras...
This paper presents the design, implementation and test of a binocular measurement device for the determination of relative pose. The instrument is designed for the use with large plant parts and machinery in very harsh environments as encountered in off-shore hydrocarbon exploration, mining and tunnelling. The device is equipped with a fall-back monocular measurement procedure. This permits measurement...
This paper proposes a selective-gaze tracking method for a head-mounted stereo gaze tracker using trinocular epipolar geometry. As the tracker consists of one front-view camera and stereo eye-view camera to extract three-dimensional attentional points, the relationship between three cameras can be considered as a kind of trinocular vision system. A process of extracting a line of sight from each eyeball...
Leakage detection and monitoring technologies play a critical role in CO2 transportation pipelines to effectively help reduce financial loses and potential damages to the environment. This paper investigates the leak of gaseous CO2 in a controlled laboratory environment using thermal imaging based on the temperature change detection technique. Platinum resistance temperature detector is also used...
The disdrometer system is a new imaged-based technique developed to measure the shape of droplets. This system contains three components: a CCD camera for capturing video images, a backlight source for illuminating drops and enhancing images, and a control unit for data acquisition and function control. In our preliminary study, we replaced raindrops with a free fall of droplets from a homemade liquid...
The concept of plenoptic cameras has existed since the early 1900s, with recent advances in computational power making them a viable tool for industrial applications. Plenoptic cameras can give 3D information about the scene with one camera, one lens, and a single image. This is possible by placing a microlens array directly in front of the image sensor. The depth estimation is based on disparities...
We present a prototype of optical tracking system running on unmodified HTC Evo 3D mobile phone with stereo camera. The system uses checkerboard markers for 3D metric reconstruction of the captured scene. We present the results of camera calibration and we assess the accuracy of tracking, by comparing the 3D point sets obtained from the system with a reference geometry. The accuracy of the prototype...
OsteoArthritis is a debilitating disease throughout the developed world, causing significant loss of quality of life to individuals and damaging economies, the imaging system described in this paper has the potential to provide an objective means of measuring and reporting lesion dimensions and providing a machine readable data archive for future study. Existing imaging methodologies have been reviewed...
The properties of the image acquired from a general camera contain a large field of view (FOV) and low resolution. In contrast, the microscopy usually offers higher magnification image a smaller FOV but high resolution. This study attempts to develop a modified super resolution (MSR) method to obtain both of high resolution and large FOV properties for criminal identified microscopic images. The MSR...
Perception of the environment in 3D has always been an important sensory input for machine vision applications. Stereo vision range sensors have been used for several decades to obtain 3D information of the scene. Still, the major issue involved in the stereo analysis of images is the correspondence problem. In this paper we consider the correspondence problem only for point clouds. The algorithm...
This paper presents a fast algorithm to segment moving objects in video sequences, as the first step of a fast object tracking system. It is based on the detection of level lines to detect closed objects contours in a scene. The detected objects are clustered using a combination of mean shift and ensemble clustering. The proposed method produces a temporal video segmentation in a fraction of the processing...
This paper presents an evaluation on the reliability of the bench-mark datasets for outdoor crowd analytic surveillance systems. The credibility of the databases are assessed based on their diverseness to yield challenges of dynamic environments. The main object of this paper is to assess the challenges imposed by the databases for sudden illumination variance and effect of wavering trees. Two bench-mark...
In machine vision applications, Time-of-Flight (TOF) sensors like the Photonic Mixer Devices (PMD) became considerable alternatives to common 3D sensing devices. Because of the enormous progress in TOF-vision systems, nowadays 3D matrix cameras can be used for many applications such as robotic, automotive, industrial, medical and multimedia applications. This paper focuses on the range data resolution...
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