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Aiming at the defects in the existing high-resolution Bayer image compression system, a real-time compression and decompression system based on the hardware architecture of ADV212+FPGA + W5300 is proposed. This system is composed of an image compression board, which receives the real-time image stream from the Camera Link interface and transmits the compressed stream to the host computer through the...
Lately, 3D is gaining momentum in cinemas and home environments. However, 2D and 3D video content only stimulates senses like hearing and seeing. In this paper we focus on a more enhanced level of entertainment by presenting a 4D multimedia player and a corresponding demonstration setup, which stimulates further senses such as haptics using the MPEG-V: Media Context and Control standard. The presented...
Image retrieval is one of the most exciting and fastest growing research areas in the field of multimedia technology. In this paper, we present and implement an image descriptor that extracts the feature of image using combination of SURF (Speed Up Robust Feature) and DCD (Dominant Color Descriptor) scheme. To evaluate the performance of implemented algorithm, we assess the performance of simulation...
With the increasing popularity of multimedia devices and applications, JPEG (Joint Photographic Experts Group) images have been being used in almost all kinds of digital devices. In JPEG compression, color space conversion has become a very important role in the image acquisition, display and the transmission of the color information. This paper experiments the performance of JPEG color space conversion...
It is a truth universally acknowledged that "a picture is worth a thousand words". The emerge of digital media has taken this saying to a complete new level. By using steganography, one can hide not only 1000, but thousands of words even in an average sized image. This article presents various types of techniques used by modern digital steganography, as well as the implementation of the...
Image retrieval is common behavior due to the dramatically increasing of image contents. From the point of view of service provider, image retrieval service is considered as a second option because if image database size is getting larger, then it seems to have to purchase a new machine. To solve this problem many reasonable solutions had been proposed. Typical solution is clustering to reduce the...
Nowadays, JCT-3V joined by ITU-T VCEG and ISO/IEC MPEG is developing new 3D video coding standard, MVC+D and 3D-AVC, based on H.264/AVC. In addition to color image, depth map is also included to be compressed because of adopting DIBR to generate virtual views. However, the computation complexity of encoder much increases due to additional depth map. This paper presents a new fast intra mode decision...
The paper proposes a novel application regarding to the image processing for the VANET. The main idea of the application is to create a query in order to get data from an image captured by a camera placed in a vehicle. The query is not related to a database but it is aimed for a still image in real time processing. Using the query we could get data by detecting and recognizing objects in an image...
An effective retargeting scheme is presented in this paper in order to improve the efficiency of image coding. Firstly, we propose to calculate the information loss in image retargeting based on learning. Then before encoding an image, we divide the image into several grids and retarget each grid according to our learning results. The retargeted image can be encoded by the traditional image codec...
In recent years, the algorithm of Bayer patterned image compression based on “structure separation” has achieved better image quality. On the basis of previous work, the algorithm based on the All Phase Inverse Discrete Cosine Biorthogonal Transform (APIDCBT) and All Phase IDCT (APIDCT) interpolation is proposed in this paper. Instead of the conventional Discrete Cosine Transform (DCT), the APIDCBT...
Due to the availability of many sophisticated image processing tools, a digital image forgery is nowadays very often used. One of the common forgery method is a copy-move forgery, where part of an image is copied to another location in the same image with the aim of hiding or adding some image content. Numerous algorithms have been proposed for a copy-move forgery detection (CMFD), but there exist...
The efficient compression of color images requires a step that takes the dependencies between the color components into account. This is mostly realized with a color transformation, mapping the red, green, and blue components into another representation. The transformation must be reversible if the compression system is to support the lossless reconstruction of the images. In this paper, we propose...
An image modeling system is critical tool for CDVS (Compact Descriptor for Visual Search) matching test in MPEG-7. There are uncountable environmental variables in real world and most application developers want to define as them. For such a reason, this paper first presents an image modeling system, and then applies the proposed system development for robust descriptor of environmental change. The...
This paper proposes a watermarking method that can be applied to DICOM images to strengthen its security and privacy. A robust watermark is used to improve the identification/authentication of the image, even if it has been seriously modified, semifragile watermarks are used to embed information intended to vanish if the image losses its clinical/research value, and fragile watermarks are used to...
It's well known that the spatial ±1 steganography on JPEG decompressed images is relatively easier to detect than those never compressed ones. Though some targeted methods that are special for JPEG decompressed carriers are designed, there are still some drawbacks among them. First, most methods are not perfect or even don't work for embedding rate as low as 0.0003 bits per pixel, or even lower. Second,...
Encoding images containing mixed content in web compatible formats like PNG, GIF and JPEG poses challenges in maintaining the quality along with good compression. In this paper, we describe a method for improving the compression of web compatible compound images while retaining high quality. The proposed method is based on the principle that the compression ratio of a given image depends upon both...
In many conventional lossless color image compression methods, the pixels or lines from each color component are interleaved, and then they are predicted and coded. Also, it has been reported that the reversible color transform (RCT) followed by a grayscale encoder gives higher coding gain than the independent compression of each channel does. In this paper, we propose a lossless color image compression...
Visual information on the web, in particular in form of images, is increasing at a rapid rate. Consequently, efficient and effective techniques to retrieve visual information are sought after, especially as it can be usefully employed to augment textual information. Since users rarely annotate images, this proves to be a challenging task, however much progress has been reported in the area of content-based...
This paper presents a block-based low-complexity screen compression scheme. In this scheme, the input screen is split into non-overlapping blocks which are classified as pictorial blocks and textual blocks. We design a low-complexity yet efficient algorithm to compress the textual blocks. We use base colors plus escape pixels to represent and quantize the text pixels, and such quantization mechanism...
Content-based image retrieval (CBIR) is a field of active research for almost 20 years. This timeframe has seen several generations of hardware and corresponding changes in computer usage patterns. It is therefore prudent to periodically reevaluate known methods in the context of modern hardware and usage patterns. Overall the issue of resource usage in CBIR is somewhat neglected. In this paper some...
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