Results 261 to 270 of about 842,482 (293)

Efficient shadow map filtering

2008
Schatten liefern dem menschlichen Auge wichtige Informationen, um die räumlichen Beziehungen in der Umgebung in der wir leben wahrzunehmen. Sie sind somit ein unverzichtbarer Bestandteil der realistischen Bildsynthese. Leider ist die Sichtbarkeitsberechnung ein rechenintensiver Prozess.
openaire   +3 more sources

Shadow Bandpass Filter with Q-improvement

2019 5th International Conference on Engineering, Applied Sciences and Technology (ICEAST), 2019
A new architecture of the shadow bandpass filters with the quality factor improvement is proposed. The presented idea employs external amplifiers cooperating with the classical biquad cell resulting in convenient electronic tunability of the characteristic frequency and the quality factor.
Seangrawee Buakaew, Wipavan Narksarp, Chariya Wongtaychatham   +2 more
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Fuzzy Implicative Filters of Be-Algebras Based on the Theory of Falling Shadows [PDF]

Facta Universitatis Series Mathematics and Informatics, 2018
Based on the idea of falling shadows and fuzzy sets, the notion of a falling fuzzy implicative filter of a BE-algebra is introduced. Relations between fuzzy implicative filters and falling fuzzy implicative filters are provided.
Bijan Davvaz
exaly   +3 more sources

Ofcc Based Shadow Filter

i-manager's Journal on Circuits and Systems, 2016
An electronic filter is a linear two-port network, which is used for the purposes of frequency-selection or inversely frequency-rejection over a specified frequency range. Such networks ideally possess a frequency band over which the magnitude of transmission is unity (the filter passband) and a region where it is zero (the filter stopband) (Sedra &
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Filtered Stochastic Shadow Mapping Using a Layered Approach

Computer Graphics Forum, 2015
AbstractGiven a stochastic shadow map rendered with motion blur, our goal is to render an image from the eye with motion‐blurred shadows with as little noise as possible. We use a layered approach in the shadow map and reproject samples along the average motion vector, and then perform lookups in this representation.
Magnus Andersson, Jon Hasselgren, Jacob Munkberg, Tomas Akenine-Möller   +3 more
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Noise Reduction of Chaotic Systems by Kalman Filtering and by Shadowing

International Journal of Bifurcation and Chaos, 1997
We investigate two techniques for filtering signals from noisy nonlinear systems. Both the dynamics and the observed signals may be subject to noise. The first technique is a modified Kalman filter which accounts for the noise-amplification properties of chaotic systems and has less tendency to diverge than the usual Kalman filter.
Walker, David M., Mees, Alistair I.
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New CFOA-Based Shadow Banpass Filter

2016 International Conference on Electronics, Information, and Communications (ICEIC), 2016
This paper presents a new topology for implementing a bandpass shadow filter using the current-feedback operational amplifier (CFOA). The proposed circuit uses CFOAs, and avoids the use of external summing circuit to implement a shadow bandpass filter with controlled center frequency. Experimental results obtained using the AD844 CFOA are included.
Muhammad Taher Abuelma'Atti
exaly   +2 more sources

Filtering the shadows from poorly illuminated photos

Proceedings of the 2010 ACM Symposium on Applied Computing, 2010
This paper presents a new algorithm for filtering shadowy photos degraded by uneven light condition. The dark photos are harder to use for face recognition or even an analysis of the scene. Corrections can be made using commercial tools as Photoshop™ but this is done manually and it requires a specialized user.
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Shadowed non-local image guided filter

Ninth International Conference on Graphic and Image Processing (ICGIP 2017), 2018
Guided image filter has been widely used in image processing. Considering the Non-local model is an excellent method for global information accumulation, the non-local image guided filter has been proposed and shown good performance in many image processing tasks by utilizing the non-local similarity of the guidance image. In this paper, we introduce a
C. L. Philip CHEN, LONG CHEN, LI GUO
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MOSFET-C Shadow Filters Based on FDCCII for Cognitive Communications

Journal of Circuits, Systems and Computers, 2022
In cognitive communications, it is very important to be able to use data in different standards with a single receiver for reducing the cost. In order to achieve this, the application of shadow filters in cognitive communications provides an advantage in terms of having both a wide frequency range and an easy reconfiguration. In this paper, new MOSFET-
openaire   +2 more sources