A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Nargundkar, Sneha
- Edge Detection Techniques:A Survey
Authors
1 Department of Electronics & Telecommunication, S.R.I.E.I.T., Shiroda, Goa, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 2Sp (2016), Pagination: 274-281Abstract
An edge may be defined as a set of connected pixels that forms a boundary between two disjoints regions. Edge detection refers to the process of identifying and locating sharp discontinuities in an image. Edge detection process significantly reduces the amount of data and filters out useless information, while preserving the essential structural properties in an image. Since computer vision involves the recognition and classification of objects in an image, edge detections is a vital tool. In this paper, the main aim is to study edge detection process based on different techniques.
- A Digital Watermarking Technique Using Discrete Wavelet Transform
Authors
1 Shree Rayeshwar Institute of Engineering & Information Technology, Shiroda, Goa, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 2Sp (2016), Pagination: 303-307Abstract
The data embedded on digital media or distributed over the internet can easily be replicated without error, putting the rights of their owners at risk. Even when encrypted for distribution, data can easily be decrypted and copied. One way to discourage illegal duplication is to insert a watermark into potentially vulnerable data in such a way that it is impossible to separate the watermark from the data. Watermarking dependency on the original image increases its robustness but at the same time we need to make sure that the watermark is imperceptible. In this paper, we have presented a robust digital image watermarking scheme based on Discrete Wavelet Transform by embedding scrambled watermark in middle frequency subband. The imagescrambling is applied by Arnold Transform. The decomposition is done with Haar wavelet and direct weighting factor is used in watermark embedding and extraction process. The scheme results in exact recovery of watermark with standard database images of size 512x512, giving Correlation Factor equal to 1 with PSNR values in the range of 53-60dB.