Cryogenic treatment can be used as a supplemental treatment that is performed on some tool steels between quenching and tempering as an effective method for decreasing retained austenite and increasing wear resistance. In this research, the effect of deep cryogenic treatment (DCT) on dimensional stability and mechanical properties of 80CrMo12 5 tool steel was investigated. The martensitic trans...

In this paper, we propose a high capacity dataembedding system in DCT domain for colored images and review the existing high capacity data embedding systems both in spatial domain as well as transform domain. The embedding is done on the quantized DCT coefficients using the concept of Hadamard Matrix. The system has very high capacity as comparable to the existing techniques of DCT domain. The ...

This paper presents stable, radix-2, completely recursive discrete cosine transform algorithms DCT-I and DCT-III solely based on DCT-I, DCT-II, DCT-III, and DCT-IV having sparse and orthogonal factors. Error bounds for computing the completely recursive DCT-I, DCT-II, DCT-III, and DCT-IV algorithms having sparse and orthogonal factors are addressed. Signal flow graphs are demonstrated based on ...

due to high speed computer networks, the use of digitally formatted data has increased many folds.the digital data can be duplicated and edited with great ease which has led to a need for effectivecopyright protection tools. digital watermarking is a technology of embedding watermark withintellectual property rights into images, videos, audios and other multimedia data by a certainalgorithm .di...

Perturbed Quantization (PQ) steganography scheme is almost undetectable with the current steganalysis methods. We present a new steganalysis method for detection of this data hiding algorithm. We show that the PQ method distorts the dependencies of DCT coefficient values; especially changes much lower than significant bit planes. For steganalysis of PQ, we propose features extraction from the e...

In this paper, the design and development of a new fully parallel architecture for the computation of the threedimensional discrete cosine transform (3D DCT) is presented. It can be used for the computation of either the forward or the inverse 3D DCT and is suitable for real-time processing of 2D or multi-view video codecs. The computation of the 3D DCT is carried out using the row-column-frame...