A (2, n)-Visual Cryptography Scheme (VCS) is a kind of secret sharing scheme, where n participants share a secret image, and any two of them can recover the secret image visually without any cryptographic knowledge and computation devices, but any one of them cannot get any information about the secret image other than the size of the secret image. This paper studies the (2, n)−V CSXOR, and sho...

The pixel size imposes a fundamental limit on the amount of information that can be displayed or recorded on a sensor. Thus, there is strong motivation to reduce the pixel size down to the nanometre scale. Nanometre colour pixels cannot be fabricated by simply downscaling current pixels due to colour cross talk and diffraction caused by dyes or pigments used as colour filters. Colour filters ba...

An improved method for subtracting contaminants from Cosmic Microwave Background (CMB) sky maps is presented, and used to estimate how well future experiments will be able to recover the primordial CMB fluctuations. We find that the naive method of subtracting foregrounds (such as dust emission, synchrotron radiation, free-free-emission, unresolved point sources, etc.) on a pixel by pixel basis...

We can improve the detection of targets and anomalies in a cluttered background by more effectively estimating that background. With a good estimate of what the target-free radiance or reflectance ought to be at a pixel, we have a point of comparison with what the measured value of that pixel actually happens to be. It is common to make this estimate using the mean of pixels in an annulus aroun...

Image classification is an important task for many aspects of global change studies and environmental applications. In this study we compare two different classification approaches, which are Object based and Pixel based. Object Based Classification (OBC) methods are increasingly used for classification of land cover/land use from high resolution images, and often the final result is close to t...

The development of robust object-oriented classification methods suitable for medium to high resolution satellite imagery provides a valid alternative to ‘traditional’ pixel-based methods. This paper compares the results of an object-oriented classification to a supervised pixel-based classification for mapping land cover in the tropical north of the Northern Territory. The object-oriented appr...

In the framework of the Medipix1 collaboration the PCC, a single photon counting pixel chip, has been developed with the aim of improving the contrast resolution in medical imaging applications. The PCC consists of a matrix of 64]64 square pixels with 170lm side length, each pixel comprising a 15-bit counter and a pulse-height discriminator. The chip has been bump bonded to equally segmented 20...

In this paper we describe a variational approach to computing dense optic flow in the case of non-rigid motion. We optimise a global energy to compute the optic flow between each image in a sequence and a reference frame simultaneously. Our approach is based on subspace constraints which allow to express the optic flow at each pixel in a compact way as a linear combination of a 2D motion basis ...

In organic light-emitting diodes (OLEDs) manufacturing, inkjet printing has rapidly become popular due to its high resolution and low cost. However, the mechanism of droplet impacting on a rectangular pixel in OLEDs is not yet clear. this paper, coalescence dynamics including spread retraction stages simulated by software fluent. addition, dynamic model proposed analyze behavior pixel. stage, e...

The J =1–0 lines of HCN and HCO + have become the default tracers dense molecular gas in external galaxies. To study relation between emission density, we mapped their =3–2 with ALMA Compact Array (ACA) nearby star-forming galaxies NGC3351, NGC3627, NGC4321. Combined archival line maps HCN(1–0), (1–0), CO(1–0), CO(2–1), use this data set to: (1) compare excitation normal starburst/AGN galaxies;...