• Title/Summary/Keyword: camera-phone

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Illuminance Dynamic Range Expansion using Gamma & Multi-Point Knee for Smart Phone Camera (감마 및 다중 포인터 니를 이용한 스마트폰 카메라의 광 다이나믹 영역 확장)

  • Choi, Duk-Kyu;Han, Chan-Ho
    • IEMEK Journal of Embedded Systems and Applications
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    • v.8 no.1
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    • pp.43-50
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    • 2013
  • The narrow dynamic range of most smart phone cameras is severely limited. It usually is narrower than the dynamic range of most scenes. So we proposes a illuminance dynamic range expansion using multi-point knee for smart phone camera. Such as logarithmic functions the proposed method compress the image sensor output signal. Additionally, the proposed method was merged into the gamma that is essential circuit for any cameras. To justifying multi-point knee effectiveness, we configure the control and quality evaluation system for smart phone camera module. Experimental results show that the lost information by cut off and saturated affectively reconstructed in darker and in brighter areas. Finally this methods have advantage to implement without any changing hardware for conventional smart phones.

Effects of Food Consumption Monitoring Using a Camera-Phone on Body Weight and Serum Lipid Level in Obese Female College Students (비만여대생을 대상으로 카메라폰을 이용한 음식섭취 모니터링 강화에 의한 체중 및 혈청지질 감소 효과)

  • Kim, Young-Suk;Kim, Yun-Joo;Hong, In-Sun;Kim, Seon-Hee;Chang, Un-Jae
    • Journal of the Korean Dietetic Association
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    • v.18 no.2
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    • pp.115-125
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    • 2012
  • This study was conducted to investigate the effects of food consumption monitoring using a camera-phone in a weight control program. Twenty-six female college students (>30% body fat) were randomly assigned to the camera-phone and diary (CD) group or diary (D) only group. During the 8-week weight control program, the CD group controlled their food consumption using a camera-phone, in which they took a food picture and uploaded it to the homepage. However, the D group used only a diary to record their food intake. The mean energy intake of the CD group during the program was 1451.9 kcal while that of the D group was 1524.3 kcal. The total energy intakes of both groups significantly decreased during the program. The CD group lost 5.2 kg of body weight and 3.1% body fat while the D group lost 2.2 kg of body weight and 1.1% body fat. The body weight and fat levels significantly decreased in the CD group compared to the D group. The triglyceride, total-cholesterol and LDL-cholesterol levels of the CD group as well as the total-cholesterol level of the D group significantly decreased during the program. The total-cholesterol and LDL-cholesterol levels both significantly decreased in the CD group compared to the D group. In this study, it was concluded that digital photography method using a camera-phone might influence weight control through trained consumption monitoring, which helps individuals reduce discrepancies between perceived and actual consumption levels.

Athermalized Design of Compact Optical System for Phone Camera (폰 카메라용 초소형 광학계의 온도보정 설계)

  • Park, Sung-Chan;You, Byoung-Taek;Lee, Jong-Ung
    • Korean Journal of Optics and Photonics
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    • v.20 no.3
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    • pp.148-155
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    • 2009
  • In this paper, we analysed what effect the design variables, such as refractive index, central thickness and radius of curvature, had on the first order properties and image quality of optical systems when temperature changed. The optical parameters were varied at each temperature, then the coupling and ruler methods were used to design an athermalized lens for a phone camera. This concept was first used to design the lens for a 1/3.2" 5M phone camera. The designed lens satisfies all the specifications for a phone camera, and the variations of the back focal length(${\Delta}BFL$) are reduced to $10{\mu}m$ for a temperature range of $-10^{\circ}C$ to $+60^{\circ}C$. Also, the TTL of 5.5 mm results in a compact system. All design concepts and results discussed in this paper are expected to be useful in development for the phone and CCTV camera.

Camera-Module for Mobile-Phone View Point from Module Assembly Maker

  • Muraishi, Hiroaki
    • Proceedings of the International Microelectronics And Packaging Society Conference
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    • 2006.10a
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    • pp.37-45
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    • 2006
  • The mobile-phone which Camera was put on was released at the end of 2000 and dramatically puts up the deployment ratio because not only simple Camera but also a function that the photograph which I took is dispatched was added. It is the force that demand in this year presses 600,000,000 sale of a mobile-phone is estimated to be 960,000,000 of them in 2006, and to be able to include two errands with a support model after 3G. A person of entry to a camera-module appear much. In addition, the various kinds of products open markedly which a product comes to be known widely in the world, and the application range has opened widely, and considered QCDT come to be key issues for answer to market demand. By manufacturing industry, there is peculiar culture to each industry, camera-module is the composition the various industries. The construction of true Supply-chain becomes unavoidable to make a good product. I describe the point that the situation of each supply-chain and the direction for the future by the view point of module assembly maker.

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Change the structure of VCM Actuator AUTO Focusing the camera module performance optimization through (VCM(Voice Coil Motor) Actuator변경구조를 통한 AUTO Focusing 카메라모듈 성능최적화)

  • Kwon, Tae-kwon;Kim, Young-Kil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.6
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    • pp.1381-1385
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    • 2011
  • Hand-phone in the recently released high-end applied to the Camera Module is equipped with the most features Auto Focusing Camera Module and much greater importance of the pixel count is much more precise and reliable AF-powered products are being demanded by consumers. This paper is available now apply the Camera Module VCM (Actuator) for Auto Focusing Lens focal point of the problem location and resolution of positional deviation occurs Module Warranty and stable resolution of the improved structure for Actuator Drive Change the structure VCM is proposed

Design for a Defective Product Inspection Device for the Curved Glass used in Smart-phones (스마트폰 곡면 강화유리의 불량품 검사장치 설계)

  • Kim, Han-Sol;Lee, Kyung-Jun;Jung, Dong-Yean;Lee, Yeon-Hyeong;Park, Jea-Hyun;Kim, Gab-Soon
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.8
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    • pp.794-800
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    • 2015
  • This paper describes the design for a defective product inspection device for the curved glass used in smart-phone. Cameras are used as inspection devices to find cracks in LCDs (Liquid Crystal Displays), PDPs (Plasma Display Panels), etc. The devices used to inspect the curved glass used in smart-phone consist of a camera, two back-light apparatus, an inspection apparatus main body, and an image processing program. Camera image calibration was performed to smooth an image taken with the camera, and as a result, the average error was less than 0.12 pixels. And the image of a smart-phone's curved glass taken with the camera was processed using the produced program. As a result, the program could correctly extract the cracks on the curved glass. Thus, it is thought that the designed inspection device can successful detect cracks in curved tempered glass.

Design of Smart Phone Camera Lens Using Forbes Aspherical Surface (Forbes 비구면을 사용한 스마트폰 카메라렌즈의 설계)

  • Rim, Cheon-Seog
    • Korean Journal of Optics and Photonics
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    • v.28 no.4
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    • pp.141-145
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    • 2017
  • We design an F/1.8 smart -phone camera lens utilizing he Forbes aspherical-surface equation, which can effectively create a strong asphere, compared to the conventional, standard aspherical equation. We also describe the principal methodology and procedural steps of optical design to achieve specifications.

Improved dynamic range of the camera image by using double-exposure image processing method for mobile phone cameras

  • Jang, Won-Woo;Kwak, Boo-Dong;Ha, Joo-Young;Kang, Bong-Soon;Lee, Gi-Dong
    • Journal of information and communication convergence engineering
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    • v.7 no.3
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    • pp.323-329
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    • 2009
  • In this paper, we propose the improvement method of the camera images regardless of exposure environments. By using a double-exposure method, we could improve camera images with clear recognition. We applied the improvement method on the mobile phone. For the feasibility of the proposed algorithm, we compared simulated camera images with the proposed method to conventional images by using auto-exposure image. Experimental results are also shown in this paper.