No abstract

Multimedia data has increased rapidly in recent years. Textual information present in multimedia contains important information about the image/video content. The proposed method provides very efficient way to extract text from Born-Digital images. Firstly, edges are extracted from a grayscale image. New edge detection technique is introduced in this research, which gives better results for low-contrast web images. Then morphological operators are applied on the image. These operators are used to connect the broken edges of objects present in an image. Each object is classified as text or non-text on the basis of text features such as size, height to width ratio, and binary transitions, using K-Means clustering. Two new features, namely horizontal fluctuation count and vertical fluctuation count, are introduced in the proposed work. Dataset of International Conference on Document Analysis and Recognition 2011 Robust Reading Competition, Challenge 1: "Reading Text in Born-Digital Images (Web and Email)" is used in this research. The proposed method performed best in the above-mentioned competition.

No abstract

Abstract-Steganography is a means to hide the existence of information exchange. Using this technique the sender embeds the secret information in some other media. This is done by replacing useless data in ordinary computer files with some other secret information. The secret information could be simple text, encoded text or images. The media used as the embedding plane could be an image, audio, video or text files. Using steganography ensures that no one apart from the sender and the receiver knows about the existence of the message. In this paper, a steganography method based on transforms used i.e. Wavelet and Contourlet. Devised algorithm was used against each transform. Blowfish Encryption method is also embedded to double the security impact. The major advantage of applying transforms is that the image quality is not degraded even if the number of embedded characters is increased. The proposed system operates well in most of the test cases. The average payload capacity is also considerably high.