• Title/Summary/Keyword: 반도체 영상

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A Study on Illumination Mechanism of Steel Plate Inspection Using Wavelet Synthetic Images (이산 웨이블릿 합성 영상을 이용한 철강 후판 검사의 조명 메커니즘에 관한 연구)

  • Cho, Eun Deok;Kim, Gyung Bum
    • Journal of the Semiconductor & Display Technology
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    • v.17 no.2
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    • pp.26-31
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    • 2018
  • In this paper, surface defects and typical illumination mechanisms for steel plates are analyzed, and then optimum illumination mechanism is selected using discrete wavelet transform (DWT) synthetic images and discriminant measure (DM). The DWT synthetic images are generated using component images decomposed by Haar wavelet transform filter. The best synthetic image according to surface defects is determined using signal to noise ratio (SNR). The optimum illumination mechanism is selected by applying discriminant measure (DM) to the best synthetic images. The DM is applied using the tenengrad-euclidian function. The DM is evaluated as the degree of contrast using the defect boundary information. The performance of the optimum illumination mechanism is verified by quantitative data and intuitive image looks.

Number Recognition of Dot Matrix LED Display Using Morphological Processing and Template Matching (영상 형태학적 처리와 원형 정합을 이용한 도트 매트릭스 LED 디스플레이의 숫자 인식)

  • Jung, Min Chul
    • Journal of the Semiconductor & Display Technology
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    • v.17 no.2
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    • pp.41-46
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    • 2018
  • This paper proposes a new method for the number recognition on dot matrix LED display. The proposed method uses morphological processing that dilates dots of numbers and connects the dots into strokes. The size of numbers is normalized using horizontal projection because the gaps of dots are different according to the size of numbers. The numbers are segmented by connected component analysis and finally, template matching method recognizes the segmented numbers. The proposed method is implemented using C language in Raspberry Pi system with a camera module for a real-time image processing. Experiments were conducted by using various dot matrix LED displays. The results show that the proposed method is successful for the number recognition on dot matrix LED display.

Design and Implementation of Kiosk System: Focused on Kiosk of Cosmetics Editorial Shop (키오스크 UI 디자인 설계 및 구현: 화장품 편집 샵의 키오스크를 중심으로)

  • Chung, HaeKyung;Ko, JangHyok
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.1
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    • pp.79-86
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    • 2019
  • In the recent industry, unmanned systems are expected to continue to spread throughout the economy. Especially in case of cosmetics, Users do not buy it right away. They look around, test it thoroughly, check the reviews, and decide on the purchase. Therefore, unmanned system using kiosk is more popular than face - to - face service of clerks. In this study, the persona analysis was completed based on the results obtained from the questionnaires and in - depth interviews. After sorting out the needs of the users, we applied them to the kiosk UI design of "Lalavela". The purpose of this study is to propose a kiosk UI design that helps many users who want to know information about the product though they are reluctant to ask directly to the clerk.

Analysis of Correction Displacements of the Projected Distortion Image (투사된 영상에 대한 화면 변위 보정에 관한 연구)

  • Chi, Yongseok
    • Journal of the Semiconductor & Display Technology
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    • v.20 no.3
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    • pp.18-21
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    • 2021
  • This paper analyzes the distortion correction of the in the micro DMD(digital micro mirror device) projector system using 0.25 or less optical throwing distance ratio. The distortion of projected image occurs depending on the performance of the optical lens, the installation location of the projection system, and the tilt of the screen. This study analyzed the physical tilt values influencing of the distortion of projected image, removed the tilt distortion of throwing distance ratio optical lens, and adjusted the distortion image by the simulation of calibration displacements. The results of this study demonstrated within 5% TV distortion reference. Moreover, the correction method reduced the pin-distortion correction of projection system.

Image Hashing based Identifier with Entropy Operator (엔트로피 연산자를 이용한 영상 해싱 기반 인식자)

  • Park, Je-Ho
    • Journal of the Semiconductor & Display Technology
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    • v.20 no.3
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    • pp.93-96
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    • 2021
  • The desire for a technology that can mechanically acquire 2D images starting with the manual method of drawing has been making possible a wide range of modern image-based technologies and applications over a period. Moreover, this trend of the utilization of image-related technology as well as image-based information is likely to continue. Naturally, as like other technology areas, the function that humans produce and utilize by using images needs to be automated by using computing-based technologies. Surprisingly, technology using images in the future will be able to discover knowledge that humans have never known before through the information-related process that enables new perception, far beyond the scope of use that human has used before. Regarding this trend, the manipulation and configuration of massively distributed image database system is strongly demanded. In this paper, we discuss image identifier production methods based on the utilization of the image hashing technique which especially puts emphasis over an entropy operator.

Implementation of GPU Acceleration of Object Detection Application with Drone Video (드론 영상 대상 물체 검출 어플리케이션의 GPU가속 구현)

  • Park, Si-Hyun;Park, Chun-Su
    • Journal of the Semiconductor & Display Technology
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    • v.20 no.3
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    • pp.117-119
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    • 2021
  • With the development of the industry, the use of drones in specific mission flight is being actively studied. These drones fly a specified path and perform repetitive tasks. if the drone system will detect objects in real time, the performance of these mission flight will increase. In this paper, we implement object detection system and mount GPU acceleration to maximize the efficiency of limited device resources with drone video using Tensorflow Lite which enables in-device inference from a mobile device and Mobile SDK of DJI, a drone manufacture. For performance comparison, the average processing time per frame was measured when object detection was performed using only the CPU and when object detection was performed using the CPU and GPU at the same time.

Quantized CNN-based Super-Resolution Method for Compressed Image Reconstruction (압축된 영상 복원을 위한 양자화된 CNN 기반 초해상화 기법)

  • Kim, Yongwoo;Lee, Jonghwan
    • Journal of the Semiconductor & Display Technology
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    • v.19 no.4
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    • pp.71-76
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    • 2020
  • In this paper, we propose a super-resolution method that reconstructs compressed low-resolution images into high-resolution images. We propose a CNN model with a small number of parameters, and even if quantization is applied to the proposed model, super-resolution can be implemented without deteriorating the image quality. To further improve the quality of the compressed low-resolution image, a new degradation model was proposed instead of the existing bicubic degradation model. The proposed degradation model is used only in the training process and can be applied by changing only the parameter values to the original CNN model. In the super-resolution image applying the proposed degradation model, visual artifacts caused by image compression were effectively removed. As a result, our proposed method generates higher PSNR values at compressed images and shows better visual quality, compared to conventional CNN-based SR methods.

Refrigerator Food Ingredient Management System 'Pocket Scanner' Design and Implementation (냉장고 식재료 관리 시스템 '포켓스캐너' 디자인 및 구현)

  • Chung, HaeKyung
    • Journal of the Semiconductor & Display Technology
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    • v.20 no.1
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    • pp.42-47
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    • 2021
  • In this study, we developed an application that can efficiently store and manage food ingredients in refrigerators. Rather than purchasing a new smart refrigerator, a small 'pocket scanner' is inserted inside the refrigerator using an existing refrigerator to track the location of food entering and leaving the refrigerator to efficiently organize the refrigerator and save time searching for ingredients. In addition, since it can automatically record the distribution period and purchase date, it notifies users through an alarm when the distribution period expires or is shortly left. As for the research method, after discovering the needs of users through in-depth interviews, the reactions of users were investigated by adding functions that fit those needs. Users felt satisfied with managing food efficiently through the 'pocket scanner' attached to the refrigerator and answered that it was very economical because various smart functions could be used without changing to a smart refrigerator. In the next study, we will also examine the usability of the application through usability evaluation.

Bokeh Effect Algorithm using Defocus Map in Single Image (단일 영상에서 디포커스 맵을 활용한 보케 효과 알고리즘)

  • Lee, Yong-Hwan;Kim, Heung Jun
    • Journal of the Semiconductor & Display Technology
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    • v.21 no.3
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    • pp.87-91
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    • 2022
  • Bokeh effect is a stylistic technique that can produce blurring the background of photos. This paper implements to produce a bokeh effect with a single image by post processing. Generating depth map is a key process of bokeh effect, and depth map is an image that contains information relating to the distance of the surfaces of scene objects from a viewpoint. First, this work presents algorithms to determine the depth map from a single input image. Then, we obtain a sparse defocus map with gradient ratio from input image and blurred image. Defocus map is obtained by propagating threshold values from edges using matting Laplacian. Finally, we obtain the blurred image on foreground and background segmentation with bokeh effect achieved. With the experimental results, an efficient image processing method with bokeh effect applied using a single image is presented.

Customized NFT Production and Trading Service Design (맞춤형 NFT 제작 및 거래 서비스 디자인 개발)

  • HaeKyung Chung;JangHyok Ko
    • Journal of the Semiconductor & Display Technology
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    • v.22 no.1
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    • pp.99-103
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    • 2023
  • NFT technology is mostly used to create digital drawings, characters, and items, and to simply buy and sell, but research and development to spread to various contents of NFT are somewhat marginal. Therefore, this study aims to solve the above-described problems. Depending on the exercise performance, it allows users to create and trade custom NFTs. In addition, it supports users to own customized digital works through exercise performance or to make money by trading them. Through it, the aim is to enhance users' positive interest in exercise and provide devices and methods for providing customized NFT creation and trading services that can help them develop exercise habits.

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