An image stabilization optical system using deformable freeform mirrors is proposed that enables the ray sets to couple dynamically in the object and image space. It aims to correct image blurring and degradation when there is relative movement between the imaging optical axis and the object. In this method, Fermat's principle and matrix methods are used to describe the optical path of the enti...

We show that tapered arrays of thin metallic wires can manipulate electromagnetic fields on the subwavelength spatial scale. Two types of nanoscale imaging applications using terahertz and midinfrared waves are enabled: image magnification and radiation focusing. First, the tapered wire array acts as a multipixel TEM endoscope by capturing an electromagnetic field profile created by deeply subw...

Willow (Salix spp.) and associated riparian shrub communities provide habitat to a wide variety of wildlife species. Because of high between-observer variability and a lack of standardized protocols, ground-based monitoring of willow abundance has proven difficult. The objective of this study was to evaluate variability associated with collection and analysis of field data for a photo-based mon...

The optical character recognition (OCR) is the process of converting textual scanned image into a computer editable format. The proposed OCR system is for complex handwritten Kannada characters. One of the major challenges faced by Kannada OCR system is recognition of handwritten text from an image. The input text image is subjected to preprocessing and then converted into binary image. Segment...

Digital image compression is a very popular topic in the field of multimedia processing. The major focus of work is to develop different compression schemes/algorithms to provide good visual quality fewer bit to represent an image in digital format. This paper work describes software and hardware implementation of Embedded Zerotree Wavelet (EZW) image Coder-Decoder (CODEC).The EZW image CODEC i...

The digital image processing technology based on computational verb theory is presented. If images are viewed as dynamic processes along spatial coordinates then the changes of patterns of gray values can be represented as spatial verbs. The basic principles of verb image processing is to find the relation between an image and a template spatial verb. In order to reduce the calculating burdens ...

The paper describes a method for recovering the 3-D shape of a moving object from a sequence of images. While following the motion of the object, a 3-D surface model, initialised to be spherical, progressively deforms itself under the action of simulated external forces applied to the model to drive its profile towards the object profile extracted from the image. An internal energy coupled to t...

Fast field-cycling MRI offers access to sources of endogenous information not available from conventional fixed-field imagers. One example is the T(1) dispersion curve: a plot of T(1) versus field strength. We present a pulse sequence that combines saturation-recovery/inversion-recovery T(1) determination with field cycling and point-resolved spectroscopy localization, enabling the measurement ...

Conventional Inverse Synthetic Aperture Radar (ISAR) utilises the rotational motion of a target such as a ship or an aircraft to obtain a 2-D image of the target’s radar cross section (RCS) profile from a coherent radar system. This concept can be extended to obtain a 3-D RCS profile if the target's translational and rotational motion has the required attributes and is known with sufficient acc...

We introduce an image-based method for modeling a specific subject’s hair. The principle of the approach is to study the variations of hair illumination under controlled illumination. The use of a stationary viewpoint and the assumption that the subject is still allows us to work with perfectly registered images: all pixels in an image sequence represent the same portion of the hair, and the pa...