Abstract: In order to output an image to a user, an electronic device may include loading a plurality of basic image tiles with a first resolution, the plurality of basic image tiles being preset for a graphic space set based on a virtual coordinate system, determining a target basic-image tile among the plurality of basic image tiles based on a coordinate of a virtual camera set on the virtual coordinate system, transmitting information on a target basic-image tile to a server, receiving a plurality of detailed image tiles with a second resolution corresponding to the target basic-image tile from the server, and outputting an image with the second resolution based on the plurality of detailed image tiles when the virtual camera zooms in on the target basic-image tile.

Abstract: A mobile device which operates in conjunction with a mobile device cradle is provided. The mobile device is a mobile device which is held by a mobile device cradle and controls the mobile device cradle to be driven, and may include at least one camera which captures a forward image, a display, and at least one processor which executes an application which detects a subject from the forward image and controls the mobile device cradle to be driven so that a forward direction of the mobile device follows the subject according to movement of the subject.

Abstract: Provided is a method performed in a portable terminal mounted on a rotatable terminal cradle to generate a 360° captured image by controlling operations of the terminal cradle. The 360° captured image is used generate a virtual space corresponding to a captured real space. Communication is established with the terminal cradle; an image generation input is received from a user; a first captured image is generated by imaging in an imaging direction that the terminal faces; driving commands are transmitted to the terminal cradle to rotate the imaging direction of the terminal clockwise or counterclockwise; a second captured image is generated by imaging in the changed imaging direction when the terminal cradle rotates according to the driving command; and presence of a human object is determined by recognizing objects in the first and second captured images, and re-imaging is performed in the imaging direction when a human object is present.

Abstract: According to a technical aspect of the present application, a texturing method, performable on a computing device, for creating a 3D virtual model based on a plurality of data sets, each of which is created from a plurality of shooting points in an indoor space and includes a color image and a depth image, may comprise: creating a 3D mesh model based on the created plurality of data sets; texturing each of the plurality of faces included in the 3D mesh model based on an association between the face and the color image; identifying a hole face that is displayed as a hole due to the absence of the association; and confirming a plurality of associated vertices associated with the hole face and setting a color of the hole face based on the colors of the confirmed plurality of associated vertices.

Abstract: A hole filling method for providing a virtual three-dimensional (3D) model, the hole filling method being executable on a computing device and including: acquiring an original learning image and a hole generation learning image for the original learning image, wherein the hole generation learning image is an image in which at least one hole is generated based on the original learning image; generating a hole filling learning image by performing hole filling on the hole generation learning image by using a neural network; performing a spherical transformation on each of the hole filling learning image and the original learning image; and training the neural network based on a difference between the spherically-transformed hole filling learning image and the spherically-transformed original learning image.

Abstract: A hole-filling method, performable on a computing device, for providing a three-dimensional virtual model according to a technical aspect of the present application may comprises the operations of: acquiring an original training image and a hole creation training image, wherein the hole creation training image is an image in which at least one hole is created based on the original training image; creating a hole-filling training image by performing hole-filling on the hole creation training image using a neural network; performing spherical transformation on each of the hole-filling training image and the original training images; and training the neural network based on the difference between the spherically transformed hole-filling training image and the spherically transformed original training image.

Abstract: A system for providing a virtual three-dimensional (3D) model according to a technical aspect of the present application includes a user terminal and a server. The user terminal derives relative movement information from a previous capturing point to each of a plurality of capturing points in a real indoor environment to generate location information about the corresponding capturing point and generates a 360-degree color image and a 360-degree depth map image on the basis of the corresponding capturing point to generate a capture dataset of the corresponding capturing point. The server receives a plurality of capture datasets each corresponding to the plurality of capturing points in the real indoor environment from the user terminal, relates a 360-degree color image to a 360-degree depth map image generated at each of the plurality of capturing points in accordance with locations of unit pixels, and sets a distance value and a color value per unit pixel to generate point groups.

Abstract: An automatic topology mapping processing method and system. The automatic topology mapping processing method includes the steps of: obtaining, by the automatic topology mapping processing system, a plurality of images, wherein at least two of the plurality of images include a common area in which a common space is captured; extracting, by the automatic topology mapping processing system, from respective images, features of the respective images through a feature extractor using a neural network; and determining, by the automatic topology mapping processing system, mapping images of the respective images on the basis of the features extracted from the respective images.

Abstract: The described technology is a technique related to an indoor localization method using deep learning. The indoor localization method comprises: opening a 3D tour comprising a plurality of panoramic images; receiving a first perspective image captured by a camera provided in the user device; calculating global features for the first perspective image and each of the plurality of panoramic images included in the 3D tour; selecting a most similar panoramic image to the first perspective image by using the calculated global features; computing an indoor location corresponding to a location of the camera on the 3D tour by using feature points included in the selected panoramic image and the first perspective image; and providing the computed indoor location to the user device.

Abstract: A method of tracking an object performed in a portable terminal linked with a rotatable cradle so that a rotation of the rotatable cradle is controlled to track the object, and the method includes receiving frame images captured in a forward direction at a preset frame rate, and detecting whether an object exists in the frame image for each of the frame images, when the object is detected in the frame image for each of the frame images, calculating a reference distance in association with a position of the detected object in the frame image, calculating a rotational speed of the rotatable cradle for a first frame image based on accumulation of reference distances of a plurality of frame images included in a frame group including the first frame image, and controlling driving of the rotatable cradle based on the rotational speed.

Abstract: According to one technical aspect of the present invention, a locked-on target based object tracking method is a method that is performed in a portable terminal and provides an object tracking function to a recorded video captured for a forward view of the portable terminal. The locked-on target based object tracking method includes setting a tracking object, identifying an object which is existing in a frame image of the recorded video using a first artificial intelligence model and setting the object as a selected object, the object and the tracking object belong to the same, and determining whether the selected object set by the first artificial intelligence model and the tracking object belong to the same object using a second artificial intelligence model trained in a different way from the first artificial intelligence model.

Abstract: A software-based object tracking method according to a technical aspect of the present invention is a method of providing object tracking performed in a computing device including a camera module. The software-based object tracking method includes receiving a selected frame image captured at a first resolution from the camera module, setting a second resolution for a viewing window, identifying whether a tracking object exists in the selected frame image, and setting a partial area of the selected frame image including the tracking object as the viewing window on the basis of a location of the tracking object within the selected frame image. The second resolution of the viewing window may be a resolution lower than the first resolution of the selected frame image.

Abstract: In order to calculate an actual distance between coordinates in an image, a regular image for an original image may be generated based on an intrinsic parameter of a camera and pose information of the camera, based on first coordinates in the regular image that are received, first world coordinates corresponding to the first coordinates may be calculated in a world coordinate system, based on second coordinates in the regular image that are received, second world coordinates corresponding to the second coordinates may be calculated in the world coordinate system, and a distance between the first world coordinates and the second coordinates may be calculated.

Abstract: The described technology is a technique related to a 3D tour photographing apparatus and method. The 3D tour photographing apparatus comprising: a camera module for photographing a plurality of images for generating an around-view image for a particular point, a location tracking module for detecting a location change or direction change of the camera module, a tilt unit for changing a position or angle between the camera module and the location tracking module, and a control module for deriving a movement path based on data provided from the location tracking module, and for mapping the plurality of images provided from the camera module onto the movement path.

Abstract: The described technology is a technique related to a server and method for displaying additional information on a 3D tour. In this case, the method for displaying additional information on a 3D tour performed by a 3D tour management server linked to a user device, the method comprising: providing the user device with a floor plan for a particular space and an interface capable of inserting additional information based on the floor plan, receiving a plurality photographed images for configuring a 3D tour for the particular space from the user device, in a process of photographing the 3D tour performed by the user device, receiving additional information as input from the user device via the interface, combining a 3D tour configured based on the plurality photographed images and the additional information inputted via the interface, and displaying the additional information onto the 3D tour or the floor plan.

Abstract: Provided is a device cradle. The device cradle includes a fixer for fixing a device, a body portion including a main body and a penetrating groove which is formed to penetrate the main body from a top surface of the main body and accommodates at least a portion of the fixer, and a first driving portion for rotating the fixer by a specified angle around a horizontal axis with respect to the body portion, wherein the penetrating groove has a spherical shape, and wherein at least part of the fixer may be formed in a spherical shape.

Abstract: The described technology is a technique related to a system and method for displaying 3D tour comparisons. The method for displaying a 3D tour comparison including setting each reference point for first and second tours that are different from each other, and setting coordinate values for a plurality of image photographing points included in the first and second tours, respectively, in the first tour, setting a first point that is one of the plurality of image photographing points included in the first tour, in the second tour, selecting a second point closest to the coordinate value of the first point out of the plurality of image photographing points included in the second tour, and displaying an image related to the first point on a part of a split-screen of a split-screen, and displaying an image related to the second point on at least a part of the rest of the split-screen of the split-screen.

Abstract: The present inventive concept is a technique related to a system and method for displaying additional information on a 3D tour. In this case, the method for displaying additional information on a 3D tour performed by a server for providing a 3D tour service linked to a user terminal, the method includes providing a 3D tour comprising 3D information of a particular space to the user terminal, receiving coordinate information for a start point and an end point of an additional-information signpost to be created newly on the 3D tour displayed on the user terminal, creating an additional-information signpost connecting the start point and the end point, and overlappingly displaying the created additional-information signpost on the 3D tour.

Abstract: Provided is a method performed in a portable terminal mounted on a rotatable terminal cradle to generate a 360° captured image by controlling operations of the terminal cradle. The 360° captured image is used generate a virtual space corresponding to a captured real space. Communication is established with the terminal cradle; an image generation input is received from a user; a first captured image is generated by imaging in an imaging direction that the terminal faces; driving commands are transmitted to the terminal cradle to rotate the imaging direction of the terminal clockwise or counterclockwise; a second captured image is generated by imaging in the changed imaging direction when the terminal cradle rotates according to the driving command; and presence of a human object is determined by recognizing objects in the first and second captured images, and re-imaging is performed in the imaging direction when a human object is present.