Lossy JPEG compression is a widely used compression technique. Normally the JPEG technique uses two process quantization, which is lossy process and entropy encoding, which is considered lossless process. In this paper, a new technique has been proposed by combining the JPEG algorithm and Symbol Reduction Huffman technique for achieving more compression ratio. The symbols reduction technique re...

Compression is playing a vital role in data transfer. Hence, Digital camera uses JPEG standard to compress the captured image. Hence, it reduces data storage requirements.Here, we proposed FPGA based JPEG encoder. The processing system is coupled with DCT and then it is quantized and then it is prepared for entropy coding to form a JPEG encoder.

We present techniques that allow the processing of an image in the \JPEG-compressed" domain. The goal is to reduce memory requirements while increasing speed by avoiding decompression and space domain operations. An e ort is made to implement the minimum number of JPEG basic operations. Techniques are presented for scaling, previewing, rotating, mirroring, cropping, recompressing, and segmentin...

JPEG is a popular DCT-based still image compression standard, which has played an important role in image storage and transmission since its development. Advanced Image Coding (AIC) is a still image compression system which combines the intra frame block prediction from H.264 with a JPEG-based discrete cosine transform followed by context adaptive binary arithmetic coding (CABAC). It performs m...

JPEG encodes a still image through a lossy encoding followed by a lossless entropy encoding. The entropy coding in JPEG is a combination of the runlength coding and a variable-length coding. The entropy encoding employed in JPEG aims to exploit repetition of strings within a block but not across blocks. We propose application of Burrows-Wheeler transformation (BWT) to exploit repetition of stri...

For PC and even mobile devices, video and image streaming technologies, such as H.264 and JPEG/JPEG 2000, are already mature. However, the 3D model streaming technology is still far from practical use. Therefore, we wonder if 3D model streaming can directly benefit from current image and video streaming technologies. Hence, in this paper, we propose a mesh streaming method based on geometry ima...

This paper presents a modified JPEG coder that is applied to the compression of mixed documents (containing text, natural images, and graphics) for printing purposes. The modified JPEG coder proposed in this paper takes advantage of the distinct perceptually significant regions in these documents to achieve higher perceptual quality than the standard JPEG coder. The region-adaptivity is perform...

As the Joint Photographic Experts Group (JPEG) has become an international standard for image compression, we present techniques that allow the processing of an image in the "JPEG-compressed" domain. The goal is to reduce memory requirements while increasing speed by avoiding decompression and space domain operations. In each case, an effort is made to implement the minimum number of JPEG basic...

In this paper, we propose an efficient selective encryption scheme for encrypting JPEG 2000 images. The proposed scheme uses a secret key and a mapping function to generate a private initial table to encrypt the selected DWT codeblocks in the entropy coding stage of JPEG 2000 coding scheme. Theoretical analysis and experimental results show that the proposed scheme can achieve various purposes ...

In this paper, image compression algorithms have reviewed for transmission over wireless networks. The performance evaluation is based on PNSR, bit-rate, computational complexity etc. and is evaluated using Advanced Image Coding software. It has observed that compression efficiences are reasonably comparable for the JPEG 2000 and AIC, which outperforms the conventional JPEG. Baseline JPEG 2000 ...