An image compression algorithm using JPEG-LS and cubic spline interpolation (CSI) is presented in this paper. The CSI is developed in order to subsample image data with minimal distortion and to achieve image compression. It has been shown in literatures that the CSI can be combined with the transform-based image compression algorithm to develop a modified image compression codec. The compressi...

In this paper, we propose a new method of feature extraction in order to improve the efficiency of retrieving Joint Photographic Experts Group (JPEG) compressed images. Our feature extraction can be done directly to JPEG compressed images. We extract two features, DC feature and AC feature, from a JPEG compressed image. Then we measure the distances between the query image and the images in a d...

JPEG XR is a draft international standard undergoing standardization within the JPEG committee, based on a Microsoft technology known as HD Photo. One of the key innovations in the draft JPEG XR standard is its integer-reversible hierarchical lapped transform. The transform can provide both bit-exact lossless and lossy compression in the same signal flow path. The transform requires only a smal...

When JPEG images are used as cover objects for data hiding, many existing techniques require the images to be fully or partially decompressed before embedding. This makes practical application of these methods limited. In this paper, we investigate ways to hide data in the compressed domain directly and efficiently, such that both the original content and the embedded message can be recovered a...

There are a lot of information embedded in JPEG image than just graphics. Visualization of its metadata would benefit digital forensic investigator to view embedded data including corrupted image where no graphics can be displayed in order to assist in evidence collection for cases such as child pornography or steganography. There are already available tools such as metadata readers, editors an...

Since the standardization of the JPEG 2000, it has found its way into many different applications such as DICOM (digital imaging and communication in medicine), satellite photography, military surveillance, digital cinema initiative, professional video cameras, and so on. The unified framework of the JPEG 2000 architecture makes practical high quality real-time compression possible even in vide...

Bin Li, Hu Luo, Haoxin Zhang, Shunquan Tan, Zhongzhou Ji Shenzhen Key Lab of Media Information Security, Shenzhen University, P. R. China ABSTRACT Detecting double JPEG compression is important to forensics analysis. A few methods were proposed based on convolutional neural networks (CNNs). These methods only accept inputs from pre-processed data, such as histogram features and/or decompress...

In this paper we investigate iterative source-channel decoding for robust JPEG coded images transmission over noisy channels. Huffman codes used as the variable-length coding scheme in JPEG coding can be represented by an irregular trellis structure proposed by Balakirsky (1997). State transition probabilities can be derived from the irregular trellis and can be used as a priori information to ...

In this letter, we propose a data hiding approach to embed the indexing keys inside the JPEG compressed images for their retrieval, inspired from the spirit of digital watermarking. At the stage of database population, the existing approach is to compress all images by standard JPEG in order to save their storage space, but ignored the compression of their indexing keys under the notion that th...

JPEG (Joint Photographic Experts Group) is an international standard to compress and store digital color images [5]. Given a color image that was previously JPEG-compressed in some hidden color space, we aim to estimate this unknown compression color space from the image. This knowledge is potentially useful for color image enhancement and JPEG re-compression. JPEG operates on the discrete cosi...