Abstract: An optical imaging system includes a first lens having a negative refractive power, a second lens, a third lens having a convex image-side surface, a fourth lens, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, and a seventh lens having a convex object-side surface. The first to seventh lenses are sequentially disposed from an object side, and TTL/IMH<1.2 is satisfied, where TTL is a distance on an optical axis from an object-side surface of the first lens to an image plane, and IMH is a height of the image plane.

Abstract: The present technology provides 3,3-difluoroallylamines or pharmaceutically acceptable salts thereof, preparation processes thereof, pharmaceutical compositions comprising the same, and uses thereof. The 3,3-difluoroallylamines or their pharmaceutically acceptable salts exhibit potent inhibitory activity on VAP-1 and therefore can be usefully applied, e.g., for the treatment and prophylaxis of nonalcoholic hepatosteatosis (NASH).

Abstract: Disclosed is video encoding/decoding method and apparatus using a correlation of YCbCr. According to an aspect of the present disclosure, the video decoding method for predictively decoding a target block includes, receiving a bitstream and generating a residual block for a chroma block, generating reconstructed information in a luma block corresponding to the chroma block and reconstructed neighboring information about the luma block, generating reconstructed neighboring information about the chroma block, determining a scaling value and an offset value based on the reconstructed neighboring information about the chroma block and the reconstructed neighboring information about the luma block, generating a prediction block for the chroma block by applying the determined scaling value and offset value to the reconstructed information in the luma block, and generating a reconstructed block for the chroma block based on the residual block for the chroma block and the prediction block for the chroma block.

Abstract: A camera module is provided. The camera module includes a first lens module including at least one lens and having light incident thereinto, a second lens module including at least one lens, and a reflection module having a reflective member configured to guide light that has passed through the first lens module to the second lens module, and perform an optical image stabilization operation. A light blocking member is disposed between the first lens module and the reflection module, and the first lens module is coupled to the reflection module and is configured to move together with the reflection module.

Abstract: An optical imaging system includes a first lens group, a second lens group, a third lens group, and a fourth lens group sequentially disposed in ascending numerical order along an optical axis of the optical imaging system away from an object side of the optical imaging system toward an imaging plane of the optical imaging system, at least one lens group among the first to fourth lens groups being configured to be movable along the optical axis; and a reflective member disposed on an object side of the first lens group and including a reflective surface configured to change an optical path, wherein the first lens group has a positive refractive power, and 0.45?fG1/L?0.8 is satisfied, where fG1 is a focal length of the first lens group, and L is a distance from an object-side surface of the reflective member to the imaging plane.

Abstract: The present disclosure relates to video encoding or decoding and, more specifically, to an apparatus and a method for applying an artificial neural network (ANN) to video encoding or decoding. The apparatus and the method of the present disclosure are characterized by applying a CNN-based filter to a first picture and at least one of a quantization parameter map and a block partition map to output a second picture.

Abstract: The present disclosure relates to video encoding or decoding and, more specifically, to an apparatus and a method for applying an artificial neural network (ANN) to video encoding or decoding. The apparatus and the method of the present disclosure are characterized by applying a CNN-based filter to a first picture and at least one of a quantization parameter map and a block partition map to output a second picture.

Abstract: The present disclosure relates to video encoding or decoding and, more specifically, to an apparatus and a method for applying an artificial neural network (ANN) to video encoding or decoding. The apparatus and the method of the present disclosure are characterized by applying a CNN-based filter to a first picture and at least one of a quantization parameter map and a block partition map to output a second picture.

Abstract: The present disclosure relates to video encoding or decoding and, more specifically, to an apparatus and a method for applying an artificial neural network (ANN) to video encoding or decoding. The apparatus and the method of the present disclosure are characterized by applying a CNN-based filter to a first picture and at least one of a quantization parameter map and a block partition map to output a second picture.

Abstract: Provided are a method and server for providing a content list. The method and server for providing a content list includes: providing source content to a chat room, receiving a request for providing a content list related to the source content from a first terminal of a first member; providing at least one of a first content list including at least one keyword-related content selected from among the entire contents stored in the server based on a keyword of the source content and a second content list including at least one group-related content belonging to the same group as a group of the source content among the entire contents, receiving information on selection content selected by the first member among the contents included in the at least one content list, from the first terminal, and providing the selection content to the chat room.

Abstract: Disclosed herein is a method for decoding a video including determining a coding unit to be decoded by block partitioning, decoding prediction syntaxes for the coding unit, the prediction syntaxes including a skip flag indicating whether the coding unit is encoded in a skip mode, after the decoding of the prediction syntaxes, decoding transform syntaxes including a transformation/quantization skip flag and a coding unit cbf, wherein the transformation/quantization skip flag indicates whether inverse transformation, inverse quantization, and at least part of in-loop filterings are skipped, and the coding unit cbf indicates whether all coefficients in a luma block and two chroma blocks constituting the coding unit are zero, and reconstructing the coding unit based on the prediction syntaxes and the transform syntaxes.

Abstract: An optical imaging system includes a first lens group, a second lens group, a third lens group, and a fourth lens group sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an image side of the optical imaging system, at least one lens group among the first lens group to the fourth lens group being configured to be movable along the optical axis; and a reflective member disposed on an object side of the first lens group and comprising a reflective surface configured to change an optical path, wherein the first lens group has a positive refractive power, and 0.8?Fnot/Fnow?1.3 is satisfied, where Fnot is an F-number of the optical imaging system in a telephoto mode, and Fnow is an F-number of the optical imaging system in a wide-angle mode.

Abstract: A camera module includes a first lens group; a first optical path folding unit; a second lens group; and a second optical path folding unit. The first lens group, the first optical path folding unit, the second lens group, and the second optical path folding unit are sequentially disposed from an object side of the first lens group toward an imaging plane of the camera module. The first optical path folding unit includes a first fixed reflective member and a first movable reflective member configured to vary a length of an optical path between the first lens group and the second lens group, and the second optical path folding unit includes a second fixed reflective member and a second movable reflective member configured to vary a length of an optical path between the second lens group and an imaging plane.

Abstract: A lens module includes a first lens barrel in which at least one lens is disposed and including a first threaded portion and a first stepped portion on an outer circumferential surface of the first lens barrel; and a second lens barrel in which at least one lens is disposed and including a second threaded portion and a second stepped portion on an inner circumferential surface of the second lens barrel, wherein the first lens barrel and the second lens barrel are coupled to each other by fitting the first stepped portion and the second stepped portion to each other and screwing the first threaded portion and the second threaded portion to each other.

Abstract: An optical imaging system includes a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, wherein the second lens group and the third lens group are configured to move in an optical axis direction to adjust a focal length and magnification, and the following conditional expression is satisfied, FNOt?3.6, where FNOt is an F value at a telephoto end of the optical imaging system.

Abstract: A camera module includes a first lens group; a first optical path folding unit; a second lens group; and a second optical path folding unit. The first lens group, the first optical path folding unit, the second lens group, and the second optical path folding unit are sequentially disposed from an object side of the first lens group toward an imaging plane of the camera module. The first optical path folding unit includes a first fixed reflective member and a first movable reflective member configured to vary a length of an optical path between the first lens group and the second lens group, and the second optical path folding unit includes a second fixed reflective member and a second movable reflective member configured to vary a length of an optical path between the second lens group and an imaging plane.

Abstract: An optical imaging system includes: a first lens group including a plurality of lenses; a second lens group including a plurality of lenses; a first reflecting member disposed on an object side of the first lens group; and a plurality of second reflecting members arranged between the second lens group and an image sensor. One or both of the first lens group and the second lens group is movable along an optical axis, an interval along the optical axis between the first lens group and the second lens group is varied between a first interval and a second interval smaller than the first interval, and as at least one of the first lens group and the second lens group is moved, one or more of the second reflecting members are moved.

Abstract: An optical imaging system includes a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, wherein the second lens group and the third lens group are configured to move in an optical axis direction to adjust a focal length and magnification, and the following conditional expression is satisfied, FNOt?3.6, where FNOt is an F value at a telephoto end of the optical imaging system.

Abstract: An optical imaging system includes: a first lens group including a plurality of lenses; a second lens group including a plurality of lenses; a first reflecting member disposed on an object side of the first lens group; and a plurality of second reflecting members arranged between the second lens group and an image sensor. One or both of the first lens group and the second lens group is movable along an optical axis, an interval along the optical axis between the first lens group and the second lens group is varied between a first interval and a second interval smaller than the first interval, and as at least one of the first lens group and the second lens group is moved, one or more of the second reflecting members are moved.

Abstract: An optical imaging system includes a first lens group including at least one lens; a second lens group including at least one lens; and a third lens group including at least one lens, wherein the first lens group, the second lens group, and the third lens group are sequentially disposed in ascending numerical order along an optical axis from an object side toward an image side, each of the second lens group and the third lens group is configured to move along the optical axis relative to the first lens group, the at least one lens of the second lens group includes at least one glass lens and at least one plastic lens, an Abbe number of a glass lens of the second lens group is vg2_g, an Abbe number of a plastic lens of the second lens group is vg2_p, and |vg2_g?vg2_p| is greater than 25.