• Title/Summary/Keyword: phone camera module

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Experimental realization of an imaging system using wavefront coding in mobile phone camera (휴대폰용 카메라 모듈에서 파면코딩을 통한 이미지 시스템 실험구현)

  • Kim, Jong-Pil;Lee, Sang-Hyuck;Park, No-Cheol;Park, Young-Pil;Park, Kyoung-Su
    • Transactions of the Society of Information Storage Systems
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    • v.5 no.1
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    • pp.36-40
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    • 2009
  • We describe the experimental realization of image system using wavefront coding in 3-Mega pixel mobile phone camera. We designed aspheric lens to extend the depth of field (DOF) using wavefront coding. In addition, through the aspheric lens and lens barrel manufacturing, we obtained a raw image from a camera module. In our method, the acquired images are restored in the spatial frequency domain using the proposed filter and the spatial frequency response (SFR) is calculated. The proposed filters are composed of image denoising filter using low band pass filter in frequency domain and restoration filter for image restoration. Finally, we achieve an enhanced image by super-resolution image processing. Visual examples are given to demonstrate the performance of the proposed filter.

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Design of Optical Image Stabilization Actuator for Compensating Hand Tremble (손 떨림 방지를 위한 OIS 액추에이터의 설계)

  • Hur, Young-Jun;Park, No-Cheol;Park, Young-Pil;Park, Kyoung-Su
    • Transactions of the Society of Information Storage Systems
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    • v.7 no.2
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    • pp.75-79
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    • 2011
  • Recently mobile phone camera become generally spread, it is required to develop high resolution, multi-functional camera module for obtaining high image quality. To satisfy this demand, number of pixels has been increased and pixel size decreased in small mobile phone cameras. As a result, image quality is seriously dropped by blur phenomena. Especially when hand tremble is occurred, image quality is dropped by camera shake. Therefore, to obtain high quality image, it is necessary to compensate user's hand tremble. In this paper, we propose voice coil actuator for compensating hand tremble, which can apply optical image stabilization (OIS) system. Sensitivity analysis and size optimization are performed to obtain high driving force. Finally, it is confirmed that the optimized electromagnetic circuit can be applied in OIS system.

Development of Retina Healthcare Service System Using Smart Phone

  • Park, Gi Hun;Han, Ju Hyuck;Kim, Yong Suk
    • International Journal of Advanced Culture Technology
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    • v.7 no.2
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    • pp.227-237
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    • 2019
  • In this paper, we have developed a Retina Healthcare Service System through which the patient himself/herself can manage his/her retina health. In the case of conventional portable ophthalmic cameras, patients cannot check their eye health on their own because most of them are used by doctor in environments where ophthalmography cannot be performed properly. This system consists of web, app and camera modules, and when a patient mounts a camera module for fundus photography on his / her smart phone and then photographs his / her fundus through the app, the image is transmitted to a server, and the transmitted image reads the fundus the patient's fundus image status in the fundus image reading model learned using deep learning. When the doctor expresses his/her opinions about the patient 's eye condition based on the reading result and the fundus photograph, the patient can check through the app and judge whether to receive ophthalmologic treatment.

Automatic Focus Control for Assembly Alignment in a Lens Module Process (렌즈 모듈 생산 공정에서 조립 정렬을 위한 자동 초점 제어)

  • Kim, Hyung-Tae;Kang, Sung-Bok;Kang, Heui-Seok;Cho, Young-Joon;Park, Nam-Gue;Kim, Jin-Oh
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.2
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    • pp.70-77
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    • 2010
  • This study proposed an auto focusing method for a multi-focus image in assembling lens modules in digital camera phones. A camera module in a camera phone is composed of a lens barrel, an IR glass, a lens mount, a PCB board and aspheric lenses. Alignment among the components is one of the important factors in product quality. Auto-focus is essential to adjust image quality of an IR glass in a lens holder, but there are two focal points in the captured image due to thickness of IR glass. So, sharpness, probability and a scale factor are defined to find desired focus from a multi-focus image. The sharpness is defined as clarity of an image. Probability and a scale factors are calculated using pattern matching with a registered image. The presented algorithm was applied to a lens assembly machine which has 5 axes, two vacuum chucks and an inspection system. The desired focus can be determined on the local maximum of the sharpness, the probability and the scale factor in the experiment.

Hybrid Stereoscopic Camera System (이종 카메라를 이용한 스테레오 카메라 시스템)

  • Shin, Hyoung-Chul;Kim, Sang-Hoon;Sohn, Kwang-Hoon
    • Journal of Broadcast Engineering
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    • v.16 no.4
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    • pp.602-613
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    • 2011
  • In this paper, we propose a hybrid stereoscopic camera system which acquires and utilizes stereoscopic images from two different camera modules, the main-camera module and the sub-camera module. Hybrid stereoscopic camera can effectively reduce the price and the size of a stereoscopic camera by using a relatively small and cheap sub-camera module such as a mobile phone camera. Images from the two different camera modules are very different from each other in aspects of color, angle of view, scale, resolution and so on. The proposed system performs an efficient hybrid stereoscopic image registration algorithm that transforms hybrid stereoscopic images into normal stereoscopic images based-on camera geometry. As experimental results, the registered stereoscopic images and applications of the proposed system are shown to demonstrate the performance and the functionality of the proposed camera system.

Design of a Voice Coil Type Actuator for Auto Focusing Module of Mobile Phone Camera (휴대전화기 카메라의 자동초점 기능을 위한 보이스 코일형 Actuator의 설계)

  • Jung, In-Soung;Seo, Jung-Moo;Hur, Jin;Sung, Ha-Gyeong;Kim, Yang-Sik
    • Proceedings of the KIEE Conference
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    • 2006.10d
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    • pp.107-109
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    • 2006
  • This paper presents the design and fabrication results of a voice coil type actuator for auto focusing(AF) functional module of mobile phone cameras. Axisymmetric FEM and 3-dimensional FEM is used to analyze and design the actuator, and the performance is verified by fabrication and evaluation of it. The size of the fabricated 2M pixel AF module is $10.5{\times}10.5{\times}7.9mm$, and the operating performance was satisfactory.

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Agile and Intelligent Manufacturing System for a Subminiature Lens Assembly Automation (초소형 렌즈 모듈의 조립 자동화를 위한 지능형 민첩 생산시스템)

  • Kim W.;Kang H.S.;Cho Y.J.;Jung J.Y.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.169-172
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    • 2005
  • Tiny camera module using in modern cellular phone requires precise assembly processes. Higher camera resolution and more functions such as zoom lens make the number of camera parts bigger. As market grows rapidly, automatic assembly process is required. However, diverse product line and short life cycle make it difficult. To attack this, a flexible and expandable lens assembly system is proposed. For the fast manufacturing line formation, modular concept is adopted. Also each module is designed to have intelligence to save system formation time. The assembly system is built up on the standard flat-form which provides vibration free base, air and electric supply, controllers, etc. Futhermore, the assembly cell has the capability of handling tiny, thin, or transparent parts which are very difficult to align with vision.

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Development of the Gripping System for Phone-camera Assembling (폰 카메라 조립용 그립퍼 시스템에 대한 연구)

  • Lee K.S.;Im D.H.;Choi J.S.;Song J.Y.;Lee C.W.;Kwak Y.K.;Kim S.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1853-1857
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    • 2005
  • This paper reports on the development of the gripping system for automation of phone-camera module assembling. If manual assembling is shifted by automation, it will increase the fabrication speed and reduce the defective rate. In the gripping mechanism design, we needs self-adjustable passive mechanism that minimize the number of the parts. The self-adjusting system compensates the positioning errors that have been made in translations. And also we need gripper system that can be modules of parts. That makes it easy to change or repair the parts. The forces put on the objects is another considerable in the system. It must not cause dropping, breakage, scratch, and large deformation. So final target of this reaseach is how to develop the system that is speedy, small, simple, and safe

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Wide-angle Optical Module Design for Mobile Phone Camera Using Recursive Numerical Computation Method (재귀적 수치 계산법을 적용한 모바일 폰용 광각 광학계 설계)

  • Kyu Haeng Lee;Sung Min Park;Kye Jin Jeon
    • Korean Journal of Optics and Photonics
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    • v.35 no.4
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    • pp.164-169
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    • 2024
  • We applied recursive numerical computation to create a basic design of a camera optical module for mobile phones. To enhance the resolution performance for a 38-degree field of view, we constructed the optical system with six non-spherical lenses. However, to increase its applicability to a compact mobile phone, we limited the overall length to 5 mm in the design. Using the data obtained from the basic design, we proceeded with optimization design using the Zemax design tool. The optimized optical system achieved a resolution performance with a modulation transfer function value of more than 19% for a 280 lines/mm pattern and image distortion within 1.0% for all wavelength rays. In this paper, we verify the feasibility of using recursive numerical computation for the basic design of a compact mobile phone camera.

A Simulation Study on the Development of Injection Mold for the Parts of Phone Camera Lens Module (시뮬레이션을 활용한 폰카메라 렌즈모듈 부품용 사출금형개발)

  • Kim, Hye Jeong;Kim, Jae Hoon;Kim, Yeong Gyoo;Song, Jun Yeob;Moon, Dug Hee
    • Journal of the Korea Society for Simulation
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    • v.22 no.4
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    • pp.83-92
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    • 2013
  • The demand of a camera-lens-module which is installed in mobile phone has been increased explosively as the increase of mobile phone market. Recently, two missions are given to the parts manufacturer of lens module, and they are how to keep the quality of injection moulding process as the increase of resolution, and how to decrease manufacturing cost. In this paper, a simulation study is introduced which is used for developing barrel and shield considering the double-cassette type of mould. At first, the simulation for injection process using Mold Flow$^{TM}$ is applied in the phase of mould design, and mechanical simulation using DPM Assembly$^{TM}$ is applied for collision detection between picking robot and mould. As a result, the productivity increased more than 300%.