This paper proposes a joint random field (JRF) model for moving vehicle detection in video sequences. The JRF model extends the conditional random field (CRF) by introducing auxiliary latent variables to characterize the structure and evolution of visual scene. Hence detection labels (e.g. vehicle/roadway) and hidden variables (e.g. pixel intensity under shadow) are jointly estimated to enhance...

This paper focuses on evaluating the pre-processing impact in detecting low contrast regions on irregular surfaces with non-homogeneous lighting. Non homogeneous lighting represents an obstacle to the correct segmentation and subsequent classification of relevant image regions. For example in grayscale images, intensity variations are detected on the same region. Therefore lower contrast region...

We previously reported on the development and testing of a multi-spectral confocal microendoscope. Here we present a new system that will be used during an early stage clinical trial. The new microendoscope is significantly smaller, uses fewer optical elements, and is structurally more robust. The slit-scanning confocal system employs two synchronized single-axes scan mirrors and an externally ...

As data is exchanged quickly in electronic way, information security plays a vital role in transmission and storage. Digital images are widely used in industrial purpose, so it is necessary to protect image from unauthorized access. Quasi group encryption is used to encrypt the grayscale image to provide security during transmission. Computer images are extremely data intensive and hence requir...

We consider a cross-section topology which is deened on grayscale images. The main interest of this topology is that it keeps track of the grayscale informations of an image. We deene some basic notions relative to that topology. Furthermore, we indicate how to get an homotopic kernel and a leveling kernel. Such kernels may be seen as \ultimate" topological simpliications of an image. A kernel ...

We present the high-throughput fabrication technology of free-floating 3D microstructures combining fine-tuned grayscale lithography with optofluidic maskless lithography. Our system simultaneously modulated mask pattern in time phase using Digital Micromirror Device (DMD) in order to generate the different level of ultraviolet (UV) dose for photopolymerization, which causes to produce the diff...

Morphological reconstruction is part of a set of image operators often referred to as geodesic. In the binary case, reconstruction simply extracts the connected components of a binary image I (the mask) which are \marked" by a (binary) image J contained in I. This transformation can be extended to the grayscale case, where it turns out to be extremely useful for several image analysis tasks. Th...

Photolithography of multi-level channel features in microfluidics is laborious and/or costly. Grayscale photolithography is mostly used with positive photoresists and conventional front side exposure, but the grayscale masks needed are generally costly and positive photoresists are not commonly used in microfluidic rapid prototyping. Here we introduce a simple and inexpensive alternative that u...

Image segmentation is the process of partitioning an image into multiple regions or objects, each representing a coherent and meaningful part image. Segmentation methods are highly sensitive to lack homogeneity in objects owing noise intensity inconsistencies. Under such conditions, most approaches exhibit poor quality performance. This paper proposes agent-based model approach for homogenizati...

Abstract This study presents laser stripe center extraction algorithm for desktop-level 3D scanners. The accuracy is an important factor affecting scanning result. Desktop-level devices should have adaptability of a wide range objects. In this paper, energy distribution characteristics with different width, ambient light, materials and colors are obtained by experiments. Experiment results show...