Auto Focus Camera
نویسندگان
چکیده
منابع مشابه
A passive auto-focus camera control system
This paper presents a passive auto-focus camera control systemwhich can easily achieve the function of auto-focus with no necessary of any active component (e.g., infrared or ultrasonic sensor) in comparison with the conventional active focus system. To implement the technique we developed, the hardware system including the adjustable lens with CMOS sensor and servo motor, an 8051 image capture...
متن کاملAn Efficient Auto Focus Method for Digital Still Camera Based on Focus Value Curve Prediction Model
This paper models focus value curve from point light source to focus measure calculation. This model shows that focus values of one object in a scene will form a single peak bell-shaped curve in camera. Our proposed auto focus method adopts this model with focus sub-window selection to predict the peak of focus value curve. Accurate prediction for the best-focused lens position will greatly sho...
متن کاملJPEG color barcode images analysis: A camera phone capture channel model with auto-focus
As camera phones have permeated into our everyday lives, two dimensional (2D) barcode has attracted researchers and developers as a cost-effective ubiquitous computing tool. A variety of 2D barcodes and their applications have been developed. Often, only monochrome 2D barcodes are used due to their robustness in an uncontrolled operating environment of camera phones. However, we are seeing an e...
متن کاملA New Sampling Method of Auto Focus for Voice Coil Motor in Camera Modules
We present an effective and efficient sampling table for auto focus searching algorithms to phone camera modules. Many searching algorithms base on focus value curve, and they do not consider the correlation between sampling and image characterization. Proposed table is calibrated by the camera images to meet results of optical lens, sensor response, noise, image pipeline, compressed method, an...
متن کاملModified fast climbing search auto-focus algorithm with adaptive step size searching technique for digital camera
A practical real-time auto-focus algorithm for digital camera ispresented. and it improves the reliability and speed of auto-focus process, especially suitable for mega-pixel high definition camera. The proposed algorithm adopts threshold gradient and edge point count technique besides focus value function, instead of traditional two-stage climbing search algorithm that uses focus value functio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1979
ISSN: 0386-6831,1884-9652
DOI: 10.3169/itej1978.33.386