Abstract: An object detection device may include: a converter configured to convert a transmission signal radiated towards an object into a digital transmission signal and a received signal reflected from the object into a digital received signal, according to a predetermined sampling period; and at least one processor configured to: interpolate between elements of the digital transmission signal and the digital received signal that have the predetermined sampling period, to obtain an interpolated transmission signal and an interpolated received signal; remove noise from each of the interpolated transmission signal and the interpolated received signal; generate a cross-correlation signal between the interpolated transmission signal from which the noise is removed and the interpolated received signal from which the noise is removed; and acquire a three-dimensional (3D) image of the object based on at least one peak value of the cross-correlation signal.

Abstract: A method of operating a light detection and ranging (LiDAR) device includes obtaining receiving signals corresponding to reference laser pulses generated from a reference signal; obtaining a main receiving signal having a maximum value among the receiving signals with respect to a time point; correcting a value of a sub-receiving signal included in the receiving signals at the time point based on the maximum value of the main receiving signal; and obtaining a time of flight (ToF) of a laser pulse corresponding to the sub-receiving signal based on a correlation between the corrected value of the sub-receiving signal and the reference signal.

Abstract: A method of operating a light detection and ranging (LiDAR) device includes obtaining receiving signals corresponding to reference laser pulses generated from a reference signal; obtaining a main receiving signal having a maximum value among the receiving signals with respect to a time point; correcting a value of a sub-receiving signal included in the receiving signals at the time point based on the maximum value of the main receiving signal; and obtaining a time of flight (ToF) of a laser pulse corresponding to the sub-receiving signal based on a correlation between the corrected value of the sub-receiving signal and the reference signal.

Abstract: An object detection device and an operating method thereof are provided. The object detection device detects light and outputs a received signal, which is an electrical signal, time-delays a part of the received signal with respect to a rest of the received signal, converts the rest of the received signal into a digital signal, converts the time-delayed part of the received signal into one or more time-delayed digital signals, and determines a distance to an object based on the digital signal and the one or more time-delayed digital signals.

Abstract: Provided are non-uniform light-emitting lidar (light detection and ranging) apparatuses and autonomous robots including the same. A lidar apparatus may include a light source configured to emit light, an optical unit arranged on an optical path of light emitted from the light source and configured to change an optical profile of the light to be non-uniform, and a 3D sensor configured to sense location of an object by receiving reflection light from the object.

Abstract: Provided are non-uniform light-emitting lidar (light detection and ranging) apparatuses and autonomous robots including the same. A lidar apparatus may include a light source configured to emit light, an optical unit arranged on an optical path of light emitted from the light source and configured to change an optical profile of the light to be non-uniform, and a 3D sensor configured to sense location of an object by receiving reflection light from the object.

Abstract: A distance measuring device and a method of operating the same are provided. The distance measuring device may include a transmitter configured to emit a sensing signal toward a target object based on a transmission signal; a receiver configured to detect the sensing signal and output a reception signal corresponding to the sensing signal; and a processor configured to correct the reception signal using a baseline having a peak value that varies according to a time index, and determine a distance to the target object based on a cross-correlation signal indicating a cross-correlation between the corrected reception signal and the transmission signal.

Abstract: An object detection device may include: a converter configured to convert a transmission signal radiated towards an object into a digital transmission signal and a received signal reflected from the object into a digital received signal, according to a predetermined sampling period; and at least one processor configured to: interpolate between elements of the digital transmission signal and the digital received signal that have the predetermined sampling period, to obtain an interpolated transmission signal and an interpolated received signal; remove noise from each of the interpolated transmission signal and the interpolated received signal; generate a cross-correlation signal between the interpolated transmission signal from which the noise is removed and the interpolated received signal from which the noise is removed; and acquire a three-dimensional (3D) image of the object based on at least one peak value of the cross-correlation signal.

Abstract: A method of phase optimization of an optical phased array (OPA) includes: performing a phase optimization in a beam forming process with respect to a single focal point, wherein the performing the phase optimization in the beam forming process may include: performing a first phase optimization in a first method to obtain a first beam phase profile; and performing a second phase optimization on the first beam phase profile in a second method that is different form the first method.

Abstract: A method of operating a light detection and ranging (LiDAR) device includes obtaining receiving signals corresponding to reference laser pulses generated from a reference signal; obtaining a main receiving signal having a maximum value among the receiving signals with respect to a time point; correcting a value of a sub-receiving signal included in the receiving signals at the time point based on the maximum value of the main receiving signal; and obtaining a time of flight (ToF) of a laser pulse corresponding to the sub-receiving signal based on a correlation between the corrected value of the sub-receiving signal and the reference signal.

Abstract: A light detection and ranging (LiDAR) device may include: an optical phased array configured to modulate a phase of light incident on the optical phased array and emit the light; a first photodetector configured to detect, as a reference light, the light emitted from the optical phased array in a first direction toward the first photodetector, and generate a reference signal based on the reference light; a second photodetector configured to detect, as a target light including information about an object, the light emitted from the optical phased array in a second direction toward the object, and generate a target signal based on the target light; and a processor configured to determine a distance between the LiDAR device and the object based on a cross-correlation between the reference signal and the target signal.

Abstract: A method of phase optimization of an optical phased array (OPA) includes: performing a phase optimization in a beam forming process with respect to a single focal point, wherein the performing the phase optimization in the beam forming process may include: performing a first phase optimization in a first method to obtain a first beam phase profile; and performing a second phase optimization on the first beam phase profile in a second method that is different form the first method.

Abstract: A method of acquiring distance information is provided. The method includes determining a projecting order of different projected lights to be sequentially projected onto an object, based on a position of the object and/or an external input, sequentially projecting the different projected lights onto the object in the determined projecting order, obtaining modulated reflected lights by modulating the reflected lights reflected by the object; and acquiring information about a distance between the device and the object based on the modulated reflected lights.

Abstract: An image processing method for reducing distortion of a depth image may include: obtaining a plurality of original images based on light beams which are emitted to and reflected from a subject; determining original depth values of original depth images obtained from the plurality of original images, based on phase delays of the light beams, the reflected light beams comprising multi-reflective light beams that distort the original depth values; determining imaginary intensities of the multi-reflective light beams with respective to each phase of the multi-reflective light beams, based on regions having intensities greater than a predetermined intensity in the original depth images; correcting the original depth values of the original depth images, based on the imaginary intensities of the multi-reflective light beams; and generating corrected depth images based on the corrected original depth values.

Abstract: An image processing method for reducing distortion of a depth image may include: obtaining a plurality of original images based on light beams which are emitted to and reflected from a subject; determining original depth values of original depth images obtained from the plurality of original images, based on phase delays of the light beams, the reflected light beams comprising multi-reflective light beams that distort the original depth values; determining imaginary intensities of the multi-reflective light beams with respective to each phase of the multi-reflective light beams, based on regions having intensities greater than a predetermined intensity in the original depth images; correcting the original depth values of the original depth images, based on the imaginary intensities of the multi-reflective light beams; and generating corrected depth images based on the corrected original depth values.

Abstract: Provided are non-uniform light-emitting lidar (light detection and ranging) apparatuses and autonomous robots including the same. A lidar apparatus may include a light source configured to emit light, an optical unit arranged on an optical path of light emitted from the light source and configured to change an optical profile of the light to be non-uniform, and a 3D sensor configured to sense location of an object by receiving reflection light from the object.

Abstract: A method of acquiring distance information is provided. The method includes determining a projecting order of different projected lights to be sequentially projected onto an object, based on a position of the object and/or an external input, sequentially projecting the different projected lights onto the object in the determined projecting order, obtaining modulated reflected lights by modulating the reflected lights reflected by the object; and acquiring information about a distance between the device and the object based on the modulated reflected lights.