摘要:
Provided are an image brightness controlling apparatus and method, and an adaptive brightness controlling apparatus and method based on the brightness degree and/or brightness range of an image. The image brightness controlling apparatus includes a brightness increment arithmetic unit for outputting a brightness increment for a pixel, and an individual component brightness increment arithmetic unit for outputting the brightness increments of individual components constituting the pixel in response to the brightness increment for a pixel. The individual component brightness increment arithmetic unit multiplies the brightness increment of the pixel by each of the unit vectors of the components constituting the pixel to obtain the brightness increments of the individual components. The image brightness controlling apparatus further includes an adder for adding the components constituting the pixel to the brightness increments of the components. The image brightness controlling apparatus and the adaptive image brightness controlling apparatus can maintain the sense of color of an image (e.g., the hue or chroma of an image) while increasing the brightness degree and brightness range of an image.
摘要:
A method and apparatus for generating a white signal component and for controlling the brightness of an image are provided. In the above method and apparatus, the brightness increases of Red, Green and Blue, the saturations of which are not decreased from an input image are calculated using a vector, and the minimum value of such increases is utilized as the input value for the white component. Further, by adding brightness control components of RGB color to the input RGB signals, brightness increases in the direction of the original colors instead of the achromatic one are possible, which is the way the white component is added so as to increase the luminance of color display devices representing a color using a color filter such a flat panel display. Accordingly, a color saturation of the image is not decreased even with addition of the achromatic color a component. In other words, in converting a signal from the three colors such as RGB into the four colors inclusive of white component, the present invention is capable of increasing the brightness without reduction of saturation as well as extracting the white component in an easy and efficient way, which enhances the performance of image processing apparatuses such as color display devices and the like.
摘要:
A generalized scan interleaving-based encoding/decoding method using context values of neighboring pixels and an apparatus therefore, and linear down/up-sampling apparatus used in the apparatus are provided. If the down-sampling ratio is m/n, the linear down-sampling apparatus divides the down-sampling ratio into two parts, [1/2K9 and [(m2K)/n], and performs linear down-sampling by applying the two parts sequentially. If the up-sampling ratio is n/m, the linear up-sampling apparatus divides the up-sampling ratio into two parts, [n/(m2K)] and [2K], and performs linear up-sampling by applying the two parts sequentially. By applying the linear down-sampling and up-sampling method to existing generalized an interleaving-based encoding using context values of neighboring pixels, continuously-scalable down-sampling is enabled and by using the down-sampled base layer, the current layer can be encoded and decoded.
摘要:
An image segmenting apparatus and method is provided. The image segmenting apparatus includes an initial image segmenting unit, a region structurizing unit and a redundant region combiner. The initial image segmenting unit converts color signals of an input image into a color space which is based on predetermined signals, and segments the input image into a plurality of regions according to positions of color pixels of the input image in the color space. The region structurizing unit classifies the plurality of regions into layers according to horizontal, adjacent relation and hierarchical, inclusive relation between the regions, and groups adjacent regions into region groups in each layer, so as to derive a hierarchical, inclusive relation between the region groups. The redundant region combiner determines the order in which adjacent regions are combined according to the horizontal, adjacent relation between regions and the hierarchical, inclusive relation between region groups. The redundant region combiner also determines whether to combine adjacent regions according to the determined combination order, and combines adjacent regions if the adjacent regions are determined to be substantially the same. Even if regions appears to be adjacent each other in a region adjacent graph (RAG), a structural inclusive relation between regions can be derived by excluding the combination of the regions or rearranging their combination order according to a hierarchical structure. Subsequently, the mutual relation between two regions can be inferred from the inclusive relation even if the color signals of the two regions, for example, a region in a highlighted area and a region in its surrounding area, are not similar to each other.
摘要:
A method and an apparatus for encoding a digital audio signal are provided. The method comprises the steps of: mapping the digital audio signal into a plurality of sub-bands and outputting the mapped sub-band signals; allocating a number of bits to each sub-band signal according to human psychoacoustic properties, on the basis of the mapped sub-band signals; compensating each sub-band signal by receiving a transmitted previous quantized error, quantizing the compensated sub-band signals according to the corresponding allocated bit number, and transferring the current quantized error to the next quantization; and forming a transmit bit stream in frame units from the quantized data. Therefore, the quantized error generated during encoding of the audio signal is can be minimized.
摘要:
The present invention relates to a color correction method for dividing a color space and producing a color correction coefficient for respective regions. The method comprises the steps of receiving image data, discriminating a region to which the input data pertains and selecting a color correction coefficient in accordance with the region so as to produce the selected one, performing color correction by operating the selected color correction coefficient and the input data, and outputting the color-corrected image data.
摘要:
A method of progressively coding/decoding 3-D mesh information, and an apparatus therefor are provided. The progressive 3-D mesh information coding method includes the steps of reconstructing an input 3-D mesh into a plurality of mesh components, coding each of the plurality of mesh components, and multiplexing the plurality of coded mesh components into a compressed bit stream and transmitting the compressed bit stream. The method of progressively decoding the transmitted, compressed bit stream which has been coded by the coding method, includes dividing the transmitted bit stream into a plurality of coded mesh components, decoding each of the plurality of coded mesh components, and reconstructing a 3-D mesh by synthesizing the plurality of decoded mesh components.
摘要:
Provided are an image brightness controlling apparatus and method, and an adaptive brightness controlling apparatus and method based on the brightness degree and/or brightness range of an image. The image brightness controlling apparatus includes a brightness increment arithmetic unit for outputting a brightness increment for a pixel, and an individual component brightness increment arithmetic unit for outputting the brightness increments of individual components constituting the pixel in response to the brightness increment for a pixel. The individual component brightness increment arithmetic unit multiplies the brightness increment of the pixel by each of the unit vectors of the components constituting the pixel to obtain the brightness increments of the individual components. The image brightness controlling apparatus further includes an adder for adding the components constituting the pixel to the brightness increments of the components. The image brightness controlling apparatus and the adaptive image brightness controlling apparatus can maintain the sense of color of an image (e.g., the hue or chroma of an image) while increasing the brightness degree and brightness range of an image.
摘要:
A 3D sound reproducing apparatus for multiple listeners includes an inverse filter module for filtering an input sound signal such that each of the listeners can have the same virtual sound source, time multiplexing module for sequentially selecting one of the sound signals filtered by the inverse filter module at a predetermined interval, and a plurality of speakers for outputting the sound signal selected by the time multiplexing means as sound. Thus, the 3D sound reproducing apparatus for multiple listeners can concurrently present the same 3D sound effect to multiple listeners.
摘要:
An image compression method employing a conditional quadtree split method includes inputting image data in frame or field units as blocks having a predetermined size; generating an average value for all of the pixels in each block and a sub-block code value for determining whether to perform sequential quad-splitting operations on the block into a suitable sub-block according to image type; and outputting a quadtree map drawn according to the sub-block code value and the average value of each block, as a bit stream. An apparatus employing the method can transmit good quality image data having no distortion at a high transmission rate.