• Title/Summary/Keyword: Grad

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Face Recognition Network using gradCAM (gradCam을 사용한 얼굴인식 신경망)

  • Chan Hyung Baek;Kwon Jihun;Ho Yub Jung
    • Smart Media Journal
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    • v.12 no.2
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    • pp.9-14
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    • 2023

  • In this paper, we proposed a face recognition network which attempts to use more facial features awhile using smaller number of training sets. When combining the neural network together for face recognition, we want to use networks that use different part of the facial features. However, the network training chooses randomly where these facial features are obtained. Other hand, the judgment basis of the network model can be expressed as a saliency map through gradCAM. Therefore, in this paper, we use gradCAM to visualize where the trained face recognition model has made a observations and recognition judgments. Thus, the network combination can be constructed based on the different facial features used. Using this approach, we trained a network for small face recognition problem. In an simple toy face recognition example, the recognition network used in this paper improves the accuracy by 1.79% and reduces the equal error rate (EER) by 0.01788 compared to the conventional approach.

  • https://doi.org/10.30693/SMJ.2023.12.2.9 인용 PDF

Vibration Characteristics Analysis of Ultrasonic Levitation System according to the Disk-Type Stator (디스크형 스테이터 형상에 따른 초음파 부상장치의 진동특성 해석)

  • Jeong S.H.;Choi S.B.;Cha K.R.;Kim H.U.;Kim G.H.;Park J.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1527-1530
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    • 2005

  • In the semiconductor and optical industry the non-contact transportation is required for reducing the damages. The ultrasonic levitation is the solution of the problem. In this paper, the ultrasonic levitation system and 3 disk-type stator for levitation various object are proposed. The vibration modes of disks are analyzed with FEM and designed with the analysis results. The 3D vibration profiles of the disks are measured by Laser scanning vibrometer for verifying the vibration characteristics of the system. The amplitudes of the disks and the levitation heights of object are measured for evaluating the performance.

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A Study on the Mechanism of the Robot Hand based on the Segment Binary Control (구간분할 바이너리 제어기반 로봇핸드의 메커니즘에 관한 연구)

  • Jeong S.H.;Cha K.R.;Kim H.U.;Choi S.B.;Kim G.H.;Park J.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1232-1235
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    • 2005

  • In recent years, as the robot technology is developed the researches on the artificial muscle actuator that enable robot to move dextrously like biological organ become active. The widely used materials for artificial muscle are the shape memory alloy and the electroactive polymer. These actuators have the higher energy density than the electromechanical actuator such as motor. However, there are some drawbacks for actuator. SMA has the hysterical dynamic characteristics. In this paper the segmented binary control for reducing the hysteresis of SMA is proposed and the simulation of anthropomorphic robotic hand is performed using ADAMS.

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