(Out of) Focus
نویسندگان
چکیده
منابع مشابه
Detection of Out-Of-Focus Digital Photographs
One of the first criteria that a user uses in deciding to use and consume a photograph is whether it is in focus or not. We have developed an effective and efficient algorithm to detect out-offocus photographs. In this paper, we describe an algorithm that automatically determines if the captured photograph is out-offocus through image analysis. It uses several global figure-ofmerits which are c...
متن کاملMethod for out-of-focus camera calibration.
State-of-the-art camera calibration methods assume that the camera is at least nearly in focus and thus fail if the camera is substantially defocused. This paper presents a method which enables the accurate calibration of an out-of-focus camera. Specifically, the proposed method uses a digital display (e.g., liquid crystal display monitor) to generate fringe patterns that encode feature points ...
متن کاملOut-of-focus Blur: Image De-blurring
Image de-blurring is important in many cases of imaging a real scene or object by a camera. This project focuses on de-blurring an image distorted by an out-of-focus blur through a simulation study. A pseudo-inverse filter is first explored but it fails because of severe noise amplification. Then Tikhonov regularization methods are employed, which produce greatly improved results compared to th...
متن کاملImpact of out-of-focus blur on iris recognition
Iris recognition has expanded from controlled settings to uncontrolled settings (on the move, from a distance) where blur is more likely to be present in the images. More research is needed to quantify the impact of blur on iris recognition. In this paper we study the effect of out-of-focus blur on iris recognition performance from images captured with out-of-focus blur produced at acquisition....
متن کاملPartially Blind Deblurring of Barcode from Out-of-Focus Blur
This paper addresses the nonstationary out-of-focus (OOF) blur removal in the application of barcode reconstruction. We propose a partially blind deblurring method when partial knowledge of the clean barcode is available. In particular, we consider an image formation model based on geometrical optics, which involves the point-spread function (PSF) for the OOF blur. With the known information, w...
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ژورنال
عنوان ژورنال: Change: The Magazine of Higher Learning
سال: 2020
ISSN: 0009-1383,1939-9146
DOI: 10.1080/00091383.2020.1693811