region based adaptive contrast enhancement

... respectively In the map, black regions are homogeneous, gray regions represent detail regions, while white regions manifest (a) (b) (c) (d) Figure Local scale -based classification map of the ... define the scale -based classification map R (x, y) as follows: Page of 19 ⎧ ˆ ⎨ homogeneous region if σ1 x, y ≥ σsmooth R x, y ∈ edge region if σ1 x, y ≤ σedge (24) ˆ ⎩ detail region otherwise ... range of blur and contrasts Using this concept, a MRS -based diffusivity function is proposed As a result, the proposed scheme can adaptively encourage strong smoothing in homogeneous regions, while...

Ngày tải lên: 21/06/2014, 02:20

... ⎜0 1 0 H=⎜ ⎜1 0 1 ⎜ ⎝1 0 1 001011 ⎞ 100000 0 0⎟ ⎟ 0 0 0⎟ ⎟ 0 0⎟ ⎟ 0 0 0⎠ 000001 III Feedback -based adaptive network coded cooperation(FANCC) A The traditional fountain codes In this section, before ... codes, which is in line with the classic information theory In this paper, we propose Feedback -based adaptive network coded cooperation (FANCC), which makes use of the indexed feedback from the ... others keep silent and decode what it hears, which is the same as that in ANCC Figure Feedback -based adaptive network coded cooperation(FANCC) protocol About m - l broadcast-packets can be allowed...

Ngày tải lên: 20/06/2014, 22:20

... or uplink-downlink fairness Another aspect is time -based fairness and throughput -based fairness as mentioned in [29] The objective of time -based fairness is to solve the ‘performance anomaly’ ... [14] introduces a wireless LAN adaptive traffic control (WLAN-ATC) scheme, which is enhanced from the original algorithm and is Page of 26 implemented on a PC -based wireless access router to ... bandwidth allocation mechanism to achieve throughputbased per-flow fairness between uplink and downlink flows for each wireless client as well as throughputbased per-station fairness when both UDP and...

Ngày tải lên: 20/06/2014, 22:20

... with a local contrast enhancement algorithm For local contrast enhancement, histogram equalization (HE) -based contrast enhancement algorithms, such as adaptive HE (AHE) [10] and contrast- limited ... processes, namely, adaptive luminance and adaptive contrast enhancements The adaptive luminance enhancement is employed to compress the dynamic range of the image and the adaptive contrast enhancement ... image enhancement However, the existent HE -based methods generally produce strong contrast enhancement and may lead to excessive artifacts when processing color images To achieve local contrast enhancement...

Ngày tải lên: 20/06/2014, 22:20

... with a local contrast enhancement algorithm For local contrast enhancement, histogram equalization (HE) -based contrast enhancement algorithms, such as adaptive HE (AHE) [10] and contrast- limited ... processes, namely, adaptive luminance and adaptive contrast enhancements The adaptive luminance enhancement is employed to compress the dynamic range of the image and the adaptive contrast enhancement ... image enhancement However, the existent HE -based methods generally produce strong contrast enhancement and may lead to excessive artifacts when processing color images To achieve local contrast enhancement...

Ngày tải lên: 21/06/2014, 00:20

... [15] Perturbation based on a deterministic perturbation vector set can avoid extensive signaling and feedback overhead [9] This article proposes a vector perturbation -based adaptive distributed ... important for such a vector perturbation based adaptive distributed precoding scheme The selected adjustment factor for the coordinated BSs should generate a better adaptive precoding vector to approximate ... the requirement on CSI feedback [4-7,9] For feedback overhead reduction, vector perturbation based adaptive precoding schemes are designed by perturbing the precoding/beamforming vectors [4-7,9,11-15]...

Ngày tải lên: 21/06/2014, 03:20

... 1, , p, l 1, , q guaranteeing the adaptive exponential synchronization for time delayed chaotic systems with unknown parameters An LMI -Based Fuzzy Adaptive Exponential Synchronization In ... chaotic drive and response systems Based on this fuzzy model, a new fuzzy synchronization controller is designed and an analytic expression of the controller with its adaptive laws of parameters is ... , p and φl t l 1, , q are the Definition 2.1 Adaptive exponential synchronization With nonzero initial conditions, the error system 2.6 is adaptively exponentially synchronized if the synchronization...

Ngày tải lên: 21/06/2014, 07:20

... for adaptive digital predistortion based on EDGE standard,” in Proceedings of IEEE MTT-S International Microwave Symposium Digest, vol 2, pp 1353–1356, May 2001 [11] B Widrow and S Stearns, Adaptive ... stringent timing requirements on the adaptation hardware Conclusions In this paper, an efficient LUT -based adaptive memoryless predistorter configuration, with minimized chip area, has been presented An ... an adaptivepredistorter for solid state power amplifier in wireless OFDM systems,” Research Letters in Signal Processing, vol 2009, Article ID 515797, pages, 2009 [3] K Waheed and S N Ba, “Adaptive...

Ngày tải lên: 21/06/2014, 16:20

... coefficient (dB) 0.03 1.5 Load -based adaptive hysteresis Speed -based adaptive hysteresis Service -based adaptive hysteresis Figure 4: AHFR by the proposed cost -based adaptive hysteresis scheme under ... Service type P2P References Fixed hysteresis Load -based adaptive hysteresis Speed -based adaptive hysteresis Service -based adaptive hysteresis Cost -based adaptive hysteresis Figure 6: HFR per service ... music WWW Service type P2P Fixed hysteresis Load -based adaptive hysteresis Speed -based adaptive hysteresis Service -based adaptive hysteresis Cost -based adaptive hysteresis Figure 7: HFR per service...

Ngày tải lên: 21/06/2014, 17:20

... approach consists in designing space-varying filter banks based on conventional adaptive linear mean square algorithms [9–11] Another solution is to adaptively choose the operators thanks to a nonlinear ... [17] More recently, adaptive QLS have been built without requiring any prior statistical model [8] and, in [18], a 2D orientation estimator has been used to generate an edge adaptive predictor ... which are further classified into several regions corresponding to different statistical features The QVLS operators are then optimally computed for each region The originality of our approach relies...

Ngày tải lên: 22/06/2014, 19:20

... blocks within a frame into foreground and background regions based on video scene analysis Parameters for motion characteristics for each region are extracted to identify a suitable search area ... novel adaptive fast block motion estimation algorithm based on center of mass (CEM), binary transform, subsampling, and horizontal/vertical projection techniques A preliminary MV is computed based ... some studies developed search techniques based on motion type to enhance speed and quality of BMAs For example, Jiancong et al [13] proposed the content adaptive search technique that clusters...

Ngày tải lên: 22/06/2014, 19:20

... estimation -based MIMO DFE for the first detection scenario was presented in [10] Moreover, adaptive schemes, which perform linear MIMO equalization directly have been recently developed in [11–13] An adaptive ... burst, adaptive channel estimation should be employed, and detection ordering needs to be updated quite frequently, thus leading to an overall prohibitive computational complexity An adaptive ... results To the best of our knowledge, in the limited literature on adaptive MIMO equalization, the proposed method is the only adaptive BLAST DFE for wideband systems The application of the idea...

Ngày tải lên: 22/06/2014, 20:20

... C-RLS OFFF-RLS 10−3 10 SNR (dB) 15 20 FLC-RLS (4 − e2 region, − Δe2 region) FLC-RLS (4 − e2 region, − Δe2 region) FLC-RLS (8 − e2 region, − Δe2 region) (b) (b) Figure 9: BER performance versus the ... convergence of an adaptive MMSE receiver is undesirable for the dynamic multipath fading channels In this paper, a robust adaptive MMSE array receiver based on the fuzzy-inference -based RLS algorithm ... et al proposed an adaptive blind LMS implementation of the MMSE-type receiver based on the concept of the constrained minimum output energy (CMOE) for multiuser detection An adaptive blind RLS...

Ngày tải lên: 22/06/2014, 23:20

... Semantic annotation for specific domains High Keyword -based Region- based QbE supervised segm Ontology -based with relevance feedback Region- based QbE unsupervised segm Global image QbE Low Manual ... The adopted region- based approach employs still image segmentation tools that enable the time-efficient and unsupervised analysis of still images to regions, thus allowing the “content -based access ... indexing features for each region To take further advantage of the human-friendly aspects of the region- based approach, the low-level indexing features for the spatial regions can be associated...

Ngày tải lên: 23/06/2014, 01:20

... NEURAL NETWORK -BASED ADAPTIVE CONTROLLER DESIGN control approaches have the potential to overcome the difficulties in robot control experienced by conventional adaptive and nonadaptive controllers ... presented in Theorem with SUN et al.: NEURAL NETWORK -BASED ADAPTIVE CONTROLLER DESIGN 59 Fig Adaptive controller with an observer C Observer -Based Controller Design Using Multilayer NNs where can ... designing such an observer -based adaptive controller for robots using multilayer NNs with sigmoidal activation functions For performance comparison with the conventional adaptive algorithm as on-line...

Ngày tải lên: 27/06/2014, 18:20

... stimulus is relayed by olfactory receptor cells (ORCs) in the male’s antennae [17] to a specialized region of the antennal lobe (AL; the analog of the olfactory bulb in vertebrates) - the male-specific ... 1d) One potential consequence of the bicuculline-caused prolonged excitation was to decrease the contrast between the excitatory phase and the I2 period, thus resulting in a compromised coding ... directly correspond to the inter-pulse interval of the odor stimuli Furthermore, an autocorrelogram -based pulse-following index (PFI) was calculated to reflect the ratio between the peak correlation...

Ngày tải lên: 06/08/2014, 18:21

... Line-Field Based Adaptive Image Model 34 3.1 Introduction 34 3.2 Markov random field and image modeling 37 3.3 Line field with variant distribution 39 3.4 Line-Field based ... interest to use an adaptive image model in the deblurring problem in order to carefully treat the edge areas in the deblurring problem This thesis will propose a new adaptive image model based on the ... each pixel of the captured image may end up as a combination of adjacent regions in the actual scene instead of a single region When this happens, we get a blurred image of the captured scene and...

Ngày tải lên: 11/09/2015, 10:06

... Web -based Adaptive Tutoring System IES Intelligent Educational System ITS Intelligent Tutoring System MATS Motivational -based Adaptive Tutoring System PEG Partial Experimental Group WAE Web -based ... student based on adaptive presentations and adaptive navigation technologies [56] Adaptive presentation technology adapts the content to the user model Pages presented to students in a system with adaptive ... and Y Lian, “Web -based Authoring Environment for Building Adaptive Tutoring System”, IEEE Transaction on Education, under preparation [11] Y.P Hu and Y Lian, “Developing web -based adaptive tutoring...

Ngày tải lên: 14/09/2015, 08:26

Ngày tải lên: 30/09/2015, 10:12