Abstract: A method and apparatus for compensating for illumination of a reference block and a method and apparatus for encoding an image, using the illumination compensation method and apparatus, are provided. The method of compensating for illumination of a reference block includes: predicting the mean values of pixels of a current block and a reference block, based on restored values of pixels neighboring the current block, and restored values of pixels neighboring the reference block; and based on the predicted mean value of the pixels of the current block, the predicted mean value of the pixels of the reference block, and the values of the pixels of the current block and the reference block, determining an illumination compensation parameter.

Abstract: A bitrate control method and apparatus for video sequence coding by using only intra pictures are provided. The rate control method includes: separating a video sequence formed only with intra pictures, into picture group units, slice units, and macroblock units; and performing bitrate control so that a predetermined amount of bits can be generated when encoding is performed. According to the method and apparatus, overflow and underflow of a buffer can be prevented.

Abstract: Provided are an image encoding method and apparatus and an image decoding method and apparatus that are capable of canceling a correlation remaining in a residual image by predicting the residual image by using residual pixel values of restored neighboring pixels of a current block and then encoding only the difference between the residual image and a predicted image of the residual image, where the residual image is obtained using an inter color compensation algorithm that predicts one of a plurality of color component images constituting an image by using one of the remnants of the color component images.

Abstract: In a method of adaptively encoding input image data of a motion image in accordance with a temporal complexity of the motion image, and an apparatus therefore, the temporal complexity of the input image data is calculated. Next, an original frame rate of the input image data is converted into a converted frame rate based on the calculated temporal complexity. Thereafter, the input image data whose frame rate has been converted is encoded, and the encoding data of the encoded image data is controlled so that the encoded image data has information on the converted frame rate. Accordingly, the input image data is encoded at different frame rates in accordance with the temporal complexity of the input image data. Consequently, the encoded input image data is efficiently stored.

Abstract: An advanced noise estimation method is provided. The noise estimation method includes calculating motion compensation information of the input picture at a first resolution, calculating the motion compensation information of the input picture at a second resolution, and based on the motion compensation information at the first resolution and the motion compensation information at the second resolution, estimating the noise of the input picture.

Abstract: A mercury selective fluorescent chemosensor for detecting mercury ions (Hg2+) by a compound represented by formula 1 is provided. A novel fluorescent sensitive compound prepared by introducing two aminopyrene functions as a fluorescent sensitive moiety into a binding site of the compound represented by the formula 1, is used for selectively detecting mercury ions (Hg2+) is also provided. The mercury selective fluorescent sensitive chemosensor is a switch type chemosensor having ON-OFF-type Hg2+-selective fluorescence quenching behavior and is not affected by other coexistent metal ions. The changes in fluorescence of the compounds represented by formula 1 were analyzed by ratiometric approach using monomer and excimer emissions of the pyrene fluorophore to selectively signal the concentration of mercury ions (Hg2+). The chemosensor can detect mercury ions in a micromolar unit even in a solution including an excess of water.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: Provided is a method and apparatus for detecting a film source using Frequency Transform. The method includes: performing predetermined Frequency Transform on a predetermined reference pattern and storing a pattern of magnitudes of the resultant values of the predetermined Frequency Transform; receiving a predetermined number of similarity values that are measured between the same types of adjacent two fields of video including interlaced fields; performing predetermined Frequency Transform on the similarity values; and comparing magnitudes of the similarity values with the magnitudes of the predetermined reference pattern, and if differences between the magnitudes of the similarity values and the magnitudes of the predetermined reference pattern are within a predetermined range, determining the video as the film source.

Abstract: Provided are an illumination compensation method and apparatus and video encoding/decoding methods and apparatuses using the illumination compensation method. The illumination compensation method for a reference block used for motion estimation includes receiving pixel values of reconstructed neighboring pixels around a current block to be encoded and pixel values of reconstructed neighboring pixels around the reference block, and performing illumination compensation with respect to the reference block based on the input pixel values of reconstructed neighboring pixels around the current block and the input pixel values of reconstructed neighboring pixels around the reference block.

Abstract: A method and apparatus for transmitting and receiving RGB codec-based moving pictures are provided. The RGB codec-based moving picture transmitting method includes performing RGB-encoding on an RGB image and generating an encoded RGB image; receiving an audio bit stream; and generating a transmission stream on the basis of the encoded RGB image and the audio bit stream, wherein the RGB-encoding is performed using intra prediction or inter prediction for encoding a current image on the basis of a previous RGB image. By receiving and transmitting RGB images without any color format conversion, picture quality deterioration is prevented.

Abstract: Provided are an apparatus and method for encoding and decoding an RGB image without color format conversion. The RGB image encoding method includes storing an RGB image and performing RGB-encoding on the stored RGB image, wherein the RGB encoding comprises performing intra prediction or inter prediction for encoding a current image on the basis of a previous RGB image. The apparatus includes an RGB decoding unit and an RGB image storage unit, which decoded and store RGB images, respectively, and inter/intra prediction unit performing inter-prediction or intra-prediction.

Abstract: Provided are an image encoding/decoding method and apparatus, in which one of a plurality of color component images of an input image is predicted from a different color component image using a correlation between the color component images and the encoding order of the plurality of color component images is adaptively determined according to the characteristics of the input image. In the image encoding method and apparatus, prediction errors or the amounts of generated bits for the remaining color component images predicted using a previously encoded color component image according to encoding orders are compared to determine the optimal encoding order and encoding is performed using a correlation between the color component images according to the determined encoding order.

Abstract: Disclosed are a novel 8-hydroxyquinoline acetamide compound, an 8-hydroxyquinoline thioamide and use thereof. More specifically, disclosed are a novel 8-hydroxyquinoline thioamide compound suitable for use as a selective chemodosimeter that shows considerably high detection sensitivity to mercury ions, an 8-hydroxyquinoline acetamide compound as an intermediate thereof, preparation thereof, and a chemodosimeter for mercury ion-selective detection, the chemodosimeter comprising the 8-hydroxyquinoline thioamide compound. The compounds as disclosed herein exhibit considerably effective fluorescence specificity of an off-on type, detect a micromole of mercury ions from chemical and biological aqueous systems, and allow 100% desulfurization within 5 minutes, thus being considerably useful in the chemical industry.

Abstract: Provided is a method and apparatus for determining whether an input mage is a film image. The method includes (a) receiving a predetermined number of similarity values of two adjacent fields of the same kind from an image having interlaced fields, (b) classifying the received similarity values into a first group and a second group, (c) converting the similarity values classified in the first group and the second group into values different from each other, and (d) determining whether the image is a film image according to a period of the converted values. Since input similarity values are classified using a grouping, a film image can be detected without setting a threshold value.

Abstract: Provided are a method and an apparatus for encoding and decoding a color image. The method of encoding a color image includes generating a color transformation function for color format transformation for each block of the color image, performing color transformation on each block of the color image using the generated color transformation function, and performing encoding on each block of the color-transformed image.

Abstract: Provided are an image encoding/decoding method and apparatus, in which one of a plurality of color component images is predicted from a different color component image reconstructed using a correlation between the plurality of color component images. Using a reconstructed image of a first color component image selected from among the plurality of color component images forming a single color image, the other color component images are predicted.

Abstract: An image encoding/decoding method and apparatus, in which at least one of a plurality of color component images except a first color component image is predicted from motion estimation information or a reconstructed color component image of the first color component images using correlation among the plurality of color component images. The image encoding method includes performing predictive-encoding on the first color component image among the plurality of color component images forming a single image using a general encoding method, and performing motion estimation and compensation on the at least one of the other color component images or predicting the at least one of the other color component images using a reconstructed first color component image.

Abstract: Image residue encoding and decoding methods and apparatuses are provided. In this method, a residue of a color component image is predicted from another color component image using a correlation between residues of the color component images, wherein the residues correspond to differences between input images and prediction images of the respective color component images constituting a single image, so that the encoding efficiency is improved.