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The additional information approaches, multiple image approaches and the single-image approaches are some of the techniques present for the removal of the haze. The first two methods are expensive one and has high computational complexity. Recently single image approach is used for this de-hazing process because of its flexibility and low cost. Bi-orthogonal wavelet transform is used to obtain the...
In this paper, a Fast and Efficient Variable Block Size Motion Estimation algorithm is proposed for high computational video compression. Variable block size Motion Estimation algorithm decomposes each 16×16 block into 16×16, 16×8, 8×16, 8×8, 8×4, 4×8, 4×4 subsequent blocks and searches for optimum Motion Vector. Without searching for optimum motion vector in these all 7 blocks, here the proposed...
Motion blur is actually sprinkling of images, which is caused due to the relative motion of camera and scene objects, while capturing the images with long exposure time. Blurring will significantly diminish the visual quality of images. One of the solutions to reduce the blurring effect is to try to remove the blur offline. Among the deblurring processes, the estimation of blur kernel is considered...
Restoring the actual colors in images also called color constancy technique is still an open area of research in digital image processing. Many techniques has been proposed so far in order to improve the accuracy of the color constancy techniques further. This paper has presented a comparison between some well known latest color constancy techniques. The review has clearly shown that each technique...
The Direction of Arrival (DOA) technology and researches are evolving areas in array signal processing. Biomedicine, sonar, radar, seismology, astronomy communication and earthquake widely use this estimation. We receive an incoming wave by sensing an array or a set of arrays, this sensed wave can be processed to derive many related estimation information of the associated wave. The Direction of arrival...
A communication link between fishing vessels or with the sea shore using Wi-Fi is explored in this paper. For effective communication a high gain antenna is mounted at the sea shore which acts as base station (BS). Although narrow band directional antenna used in the Base Station (BS) ensures the connectivity for a long distance, the coverage will be poor without any steering mechanism, as the antenna...
A novel blind carrier frequency offset (CFO) estimation method for orthogonal frequency division multiplexing (OFDM) systems using constant modulus constellations is proposed in this study. CFO is estimated by minimizing a hybrid cost function which is formulated using properties of the covariance matrix and the magnitude of two nearby OFDM symbols. The performance of the proposed method is compared...
In video compression, one needs a highly efficient motion estimation algorithm in terms of processing speed. A novel block matching algorithm for motion estimation in a video frame sequence well suited for a high performance VLSI implementation is presented in this project. The algorithm is up to 40% faster when compared to one of the fastest existing algorithms, viz., one-at-a-time step search algorithm...
In the process of wireless communication, channel effects are always a factor of degradation in offered quality. Major channel effects such as noise effects, fading, multipathing, Doppler shift etc., results in degradation in the observed quality of service for the communication system. Various approaches are developed towards the appropriate estimation of these channel effects at the receiver side...
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