Abstract: An apparatus and method for simplifying 3-Dimensional (3D) mesh data are disclosed. The method includes measuring discrete curvature at each point of received 3D mesh data, calculating an error based on distance-curvature error metrics including the discrete curvature, first sorting a low curvature one of the calculated error values in a heap in ascending order, selecting a minimum error among the calculated errors, determining if the minimum error is less than a threshold, contracting an edge if the selected minimum error is greater than the threshold, and recalculating an error of a surface neighboring to a surface on which the contracted edge belongs and re-sorting the calculated error values.

Abstract: A panoramic picture photographing method permits more accurate photographing of an image, particularly a panoramic image of a subject, without additional equipment, or separate devices and hardware. The method includes projecting an image, which is successively inputted in every predetermined unit of time, to an imaginary surface having a same focal distance in photographing each image constituting a panoramic picture to obtain a projected image; confirming movement of a corresponding photographing apparatus so that the projected image is compared with a previous image in real time by using a motion estimation technique, to which exposure correction has been applied; determining a photographing time point of each image by confirming the confirmed movement of the corresponding photographing apparatus according to a photographing direction has reached a predetermined critical value; and photographing each image at the photographing time point of each image according to a passive input or automatically.

Abstract: A method and apparatus for generating a mosaic image by mosaic processing of an image are provided, in which an object to be used in a mosaic is acquired from a received image, the object is stored in a storage medium, a target image to be mosaic-processed is received, a mosaic block size is set, at least one object selected from among objects stored in the storage medium is received for use as a mosaic block, the target image is divided into a plurality of areas each having the mosaic block size, and the object is set as a mosaic block by reflecting a color of each divided area in the object.

Abstract: Disclosed is a method for generating a multi-resolution three-dimensional model, and for extracting feature lines using texture images and geometric data from a three-dimensional model. First, contours are detected for texture images using an image processing on the texture-mapped three-dimensional mesh data. With respect to geometric data, a discrete curvature is measured. The geometric data is parametrized into parameters in a two-dimensional domain, and contour images are detected using an image processing. The detected two contour images are generated into one model map, which is then reversely mapped to a reverse three-dimensional model, then next feature lines are extracted. Accordingly, a multi-resolution three-dimensional model can be generated while maintaining the extracted feature lines.

Abstract: A method for taking a panorama mosaic photograph includes displaying a partial image of a previously taken image as a guide image on a viewer of an image to be currently taken and taking a number of images constituting the panorama mosaic photograph according to a photography operation; projecting the taken images onto a common cylindrically curved surface; and joining the projected images into a single image.

Abstract: A method for taking a panorama mosaic photograph includes displaying a partial image of a previously taken image as a guide image on a viewer of an image to be currently taken and taking a number of images constituting the panorama mosaic photograph according to a photography operation; projecting the taken images onto a common cylindrically curved surface; and joining the projected images into a single image.

Abstract: A method and apparatus for generating a mosaic image by mosaic processing of an image are provided, in which an object to be used in a mosaic is acquired from a received image, the object is stored in a storage medium, a target image to be mosaic-processed is received, a mosaic block size is set, at least one object selected from among objects stored in the storage medium is received for use as a mosaic block, the target image is divided into a plurality of areas each having the mosaic block size, and the object is set as a mosaic block by reflecting a color of each divided area in the object.

Abstract: A method for recognizing a music score included in an image and various information included in the music score, which may be obtained through a camera provided in a mobile terminal without requiring a separate editing program. The method includes detecting a region with staff lines from the image including the music score; detecting a region with an accompaniment chord from the image by taking the region with the staff lines and a region with a musical note into consideration; extracting and removing the staff lines from the music score included in the image; recognizing the musical note by extracting the musical note from the image, from which the staff lines have been removed; recognizing the accompaniment chord by extracting the accompaniment chord from the image, from which the staff lines have been removed; and generating data for reproducing a sound source corresponding to the musical note and accompaniment chord.

Abstract: A method for coding three-dimensional (3D) data, and more particularly for coding geometry data included in the 3D data. The method includes: generating a bounding box including a vertex of the 3D data based on information included in the geometry data; dividing the bounding box into a plurality of partitions having an equal size; identifying a number of vertices included in each divided partition; appointing a divided partition as a leaf cell based on the identified number of vertices; and coding the geometry data using information on the dividing of the bounding box, information on vertices included in each divided partition, and information indicating the position of a vertex included in the leaf cell, when a divided partition is subdivided.

Abstract: An apparatus and method for simplifying 3-Dimensional (3D) mesh data are disclosed. The method includes measuring discrete curvature at each point of received 3D mesh data, calculating an error based on distance-curvature error metrics including the discrete curvature, first sorting a low curvature one of the calculated error values in a heap in ascending order, selecting a minimum error among the calculated errors, determining if the minimum error is less than a threshold, contracting an edge if the selected minimum error is greater than the threshold, and recalculating an error of a surface neighboring to a surface on which the contracted edge belongs and re-sorting the calculated error values.

Abstract: A method for photographing a panoramic picture, and for identifying motion of a photographing apparatus to automatically photograph respective images of a panoramic picture.

Abstract: A panoramic picture photographing method permits more accurate photographing of an image, particularly a panoramic image of a subject, without additional equipment, or separate devices and hardware. The method includes projecting an image, which is successively inputted in every predetermined unit of time, to an imaginary surface having a same focal distance in photographing each image constituting a panoramic picture to obtain a projected image; confirming movement of a corresponding photographing apparatus so that the projected image is compared with a previous image in real time by using a motion estimation technique, to which exposure correction has been applied; determining a photographing time point of each image by confirming the confirmed movement of the corresponding photographing apparatus according to a photographing direction has reached a predetermined critical value; and photographing each image at the photographing time point of each image according to a passive input or automatically.

Abstract: A method for photographing a panoramic picture includes the steps of checking motion of a corresponding photographing apparatus compares currently input images and previous images in real time through a motion estimation technique employing exposure compensation. Respective images constituting a panoramic picture are photographed, and image photography information is checked that includes focus distance and optical magnification to calculate actual photography range distance of the images. A pre-set threshold is set in consideration of a calculated actual photography range distance of the images. The checked motion is confirmed as to whether the pre-set threshold has been reached, and photography time points of the respective images are determined. The respective images are photographed according to a manual mode or an automatic mode at the photography time point of the respective images.

Abstract: Disclosed is a method for photographing a panoramic image including the steps of recognizing movement of a corresponding photographing apparatus by comparing a current real-time input image with a previous image through a motion estimation mechanism with exposure compensation, determining a time to photograph each next picture by determining whether movement in a photography direction reaches a preset threshold value, and photographing each next picture by manual or automatic operation at the determined time.

Abstract: A method for high-speed image processing based on graphic processing unit includes processing an input image for the image processing in a texture format of a 32 bit floating point, and performing a predetermined algorithm for the image processing on the input image through at least one or more Framebuffer Object (FOB) and outputting the result as texture data.

Abstract: Disclosed is a method of extracting ridge and valley lines from three-dimensional point data, the method including the steps of: receiving undefined point data obtained from a three-dimensional scanning system; estimating a normal vector by principal component analysis so as to calculate a normal vector with regard to each received point; and on the basis of such information, creating a moving least squares (MLS) surface of points approximation with regard to each received point. Then, Delaunay edge is created by a Voronoi diagram with regard to each point from the created MLS surface of points; and ridge (or valley) points are extracted by measuring zero-crossing on each Delaunay edge. Ridges and valleys as lines are created by connecting the extracted ridge points in a principal curvature direction. The extraction of ridge and valley lines is used as a pre-processing step for creating three-dimensional points into mesh data, and is advantageous for identifying general model features.

Abstract: Disclosed is a method for generating a multi-resolution three-dimensional model, and for extracting feature lines using texture images and geometric data from a three-dimensional model. First, contours are detected for texture images using an image processing on the texture-mapped three-dimensional mesh data. With respect to geometric data, a discrete curvature is measured. The geometric data is parametrized into parameters in a two-dimensional domain, and contour images are detected using an image processing. The detected two contour images are generated into one model map, which is then reversely mapped to a reverse three-dimensional model, then next feature lines are extracted. Accordingly, a multi-resolution three-dimensional model can be generated while maintaining the extracted feature lines.

Abstract: A method for simplifying the maintenance of a feature of three-dimensional mesh data includes: receiving an input of three-dimensional mesh data from a three-dimensional range scanning system; creating a surface approximated with regard to points of the mesh data; measuring the curvature and curvature derivative value for respective points on the created surface; measuring zero-crossing at the edge of the mesh data so as to extract feature points; connecting the feature points in the curvature direction so as to create a feature line; and calculating the edge and quadric error metric regarding the feature line so as to simplify the maintenance of the feature of the model. A complicated three-dimensional mesh model is simplified at a level desired by a user so as to reduce the time and cost related to manual treatment of a three-dimensional geometric model by a designer.

Abstract: A method for taking a panorama mosaic photograph includes displaying a partial image of a previously taken image as a guide image on a viewer of an image to be currently taken and taking a number of images constituting the panorama mosaic photograph according to a photography operation; projecting the taken images onto a common cylindrically curved surface; and joining the projected images into a single image.