sift algorithm for feature detection and description

... Jenny Ran Wang, and Mr Xi Shao for many useful discussions and detailed comments Thanks to Mr Tze Sen Hay and Mr Chern-Horng Sim for his manual work and doing experiments for some algorithms in ... Tomasi, and J M Buhmann Emprical evaluation of dissimilarity measures for color and texture, Computer Vision and Image Understanding, vol 84, pp 25-43, 2001 154 RuAn2000 Rui Y and P Anandan Segmenting ... TRAJECTORY-BASED ALGORITHM FOR BALL DETECTION AND TRACKING WITH APPLICATION TO THE ANALYSIS OF BROADCAST SPORTS VIDEO YU XINGUO NATIONAL UNIVERSITY OF SINGAPORE 2004 AN EFFECTIVE TRAJECTORY-BASED ALGORITHM FOR...

Ngày tải lên: 15/09/2015, 21:56

... black-and-white rectangles divided into four basic feature sets as shown in Figure 1 [9], including line features, edge features, center around features, and diagonal features a, Tập đặc trưng đường b, Tập ... a problem for the system of national authorities to identify each object in society to store the security of personal information, govern, search and authenticate information quickly and immediate ... environment is also an extremely important aspect needed for each algorithm Pre-Viola-Jones algorithms such as SVM, K-NN, Nave Bayes, Random Forest, MLP search are based on the principle of extracting...

Ngày tải lên: 24/04/2022, 21:58

... notice below) For information about publishing your research in Fixed Point Theory and Applications go to http://www.fixedpointtheoryandapplications.com/authors/instructions/ For information about ... following conditions: (S1) T (0)x = x for all x ∈ H; (S2) T (s + t) = T (s)T (t) for all s, t ≥ 0; (S3) T (s)x − T (s)y ≤ x − y for all x, y ∈ H and s ≥ 0; (S4) for all x ∈ H, s → T (s)x is continuous ... distribution, and reproduction in any medium, provided the original work is properly cited Hierarchical convergence of an implicit double-net algorithm for nonexpansive semigroups and variational...

Ngày tải lên: 18/06/2014, 22:20

... avoidance, and alternative algorithms are being pursued http://www.jneuroengrehab.com/content/2/1/30 Yamaha Roland Frisch and Andrew Martin designed and fabricated... are both physically and ... number not for citation purposes) Journal of NeuroEngineering and Rehabilitation Open Access Research A prototype power assist wheelchair that provides for obstacle detection and avoidance for those ... visually-impaired Collisions for able-bodied participants, in courses 1 and 2Figure 8 Collisions for able-bodied participants, in courses 1 and 2. Journal of NeuroEngineering and Rehabilitation 2005,...

Ngày tải lên: 19/06/2014, 10:20

... following conditions: (S1) T(0)x = x for all xÎ H; (S2) T(s + t) = T(s)T(t) for all s, t≥ 0; (S3) ||T(s)x - T(s)y||≤ ||x - y|| for all x, y Î H and s ≥ 0; (S4) for all x Î H, s ® T(s)x is continuous ... implicit double-net algorithm for nonexpansive semigroups and variational inequality problems Fixed Point Theory and Applications 2011 2011:101. Submit your manuscript to a journal and benefi t from: ... AccessHierarchical convergence of an implicit double-net algorithm for nonexpansive semigroups and variational inequality problems Yonghong Yao1, Yeol Je Cho2*and Yeong-Cheng Liou3 * Correspondence: yjcho@gsnu.ac....

Ngày tải lên: 20/06/2014, 21:20

... ∀x ∈ Fix T 1.3 Some algorithms for solving the hierarchical fixed point problem 1.3 have been introduced by many authors For related works, please see, for instance, 1–9 and the references therein ... Cianciaruso, G Marino, L Muglia, and Y Yao, “On a two-step algorithm for hierarchical fixed point problems and variational inequalities,” Journal of Inequalities and Applications, vol 2009, Article ... Yao, Y.-C Liou, and J.-C Yao, “A new hybrid iterative algorithm for fixed-point problems, variational inequality problems, and mixed equilibrium problems,” Fixed Point Theory and Applications,...

Ngày tải lên: 21/06/2014, 07:20

... implementation Kara Scott for her help with the evaluation of the algorithm, compilation, and fieldwork Jameson Lwebuga-Mukasa for asthma datasets and Anne Evens and Patrick MacRoy for BLL dataset Special ... is the most widely used and simplest form of clustering [14–16] The k-means algorithm is formally defined, for this study, as follows (1) Let k be the number of clusters and the input vectors defined ... the cluster patterns and point distributions for the MIL-SOM trained sets and the full versions for each dataset To further explore clusters and outliers, we did fieldwork and communal/housing...

Ngày tải lên: 21/06/2014, 16:20

... al for target aspect and motion and review the observation and clutter models focusing on the GMRf representation of the background and the derivation of the associated likelihood function for ... conjunction with more conventional algorithms for target detection/acquisition and data association For a review of alternative approaches to multitarget tracking, mostly for video applications, we refer ... targets with unknown and randomly changing aspect.The algorithms in [5– 7] were however limited by the need to use discrete-valued stochastic models for both target motion and target aspect changes,...

Ngày tải lên: 22/06/2014, 19:20

... the performance of the system 5.1 Event detection For evaluating automatic event detection, each of the videos was manually annotated and the start and end times of each dialogue, exciting and montage ... are intuitive for a viewer to understand and recognise whilst accounting for over 90% of the content of most movies To detect events we leverage traditional filmmaking prin-ciples and map these ... various genres and consistently obtains high precision and recall for all event classes A user experiment designed to evaluate the usefulness of an event-based structure for both searching and browsing...

Ngày tải lên: 22/06/2014, 19:20

... DS-CDMA, and perform numerical simulation to investigate its performance. For each run, the proposed algorithm in this paper, the direct eigen- decomposition method, the TTJ algorithm [15], and sam- ... k,m accounts for the overall effects of phase shifts and fading for the mth carrier of the kth user, P k and τ k ∈ [0, T) represent the power for each carrier of the transmitted signal and the delay ... symbol interval, and ψ(t) is the common chip waveform for all signals. We assume that the chip waveform ψ(t) is bandlimited, such as the square-root raised-cosine pulse [17], and nor malized so...

Ngày tải lên: 22/06/2014, 20:20

... mean and estimate of the variance, we suggest a threshold for detection of the preamble boundary and evaluating the probability of false and correct detections We also suggest a method for a ... variances, we select a threshold for detec-tion of the symbol boundary and evaluate the probability of false and correct detections A method for selecting a thresh-old and a detection strategy in practical ... select a threshold and detection strategy that works well for all channels and for SNRs above the lowest operating value For practical applications, we suggest the following detection strategy...

Ngày tải lên: 22/06/2014, 22:20

... my research and I am grateful to all of them Especially, I would like to sincerely thank my supervisors Prof Ariando and Prof T Venkatesan for educating and encouraging me Prof Ariando keeps me ... (reduced for h at 950 °C and 10-7 Torr vacuum) under zero and a perpendicular T field 87 Figure 3.9 In-plane transverse MR of the reduced STO (reduced for h) at and 10 K up to T The upper and lower ... pressures before and after oxygen-annealing in bar of oxygen gas flow at 600 °C for h (b) PL intensity of the 20 nm amorphous LAO/STO heterostructures fabricated at 10-6 Torr before and after oxygen-annealing...

Ngày tải lên: 10/09/2015, 09:11

... Well-defined, uniform, and large-area nanoscaled tips are of great interest for scanning probe microscopy and high-efficiency field emission An ultra-sharp nanotip causes higher electrical field and, hence, ... 1,000 V and measured the emission current Results and discussion The progress of transformation of the tips and photoresist at different etching time is displayed in Table From the eagle-view and ... increased and etched away Therefore, the sidewall of the silicon pillar is pared and transformed into tip (Figure 2b,c,d) Finally, the PR is fully etched away after 10-min etching, and a pyramid-like...

Ngày tải lên: 21/06/2014, 17:20

... thicknesses for the intrinsic aSi:H, µc-Si:H(n) and ZnO:Al are 3, 69 and 142 nm, respectively, for the conductive DBR For the standard case, the thicknesses for a-Si:H(n) and ZnO:Al are 20 and 80 ... substrate and (ii) standard μc-Si:H(n) and ZnO:Al thickness on an Al-coated substrate For the DBR stack, the μc-Si:H(n) and ZnO:Al layer thickness is chosen as 69 nm, and 142 nm respectively For the ... topics, and for providing the funds to present selected research work in reputable local and international conferences, and a chance to meet peers with similar interests in the photovoltaic field For...

Ngày tải lên: 09/09/2015, 11:15

... nm, and (e) λ = 1298 nm) and the dipole resonance ((b) λ = 1233 nm, (d) λ = 1599 nm, and (f) λ = 1887 nm) The lattice constants for nanorod array are 800 nm for (a) and (b), 1100 nm for (c) and ... and (e) λ = 1298 nm) and the dipole resonances ((b) λ = 1233 nm, (d) λ = 1599 nm, and (f) λ = 1887 nm) The lattice constants of the nanorod array are 800 nm for (a) and (b), 1100 nm for (c) and ... life I am grateful for time spent with my roommates and friends, for my backpacking buddies, and for many other people and memories Lastly, I am deeply thankful to my parents for giving birth to...

Ngày tải lên: 09/09/2015, 11:17

... design at core sizes of 24, 28, 32 and 34 µm and a constant gap of µm and (d) Hybrid design at gap sizes of 2, 4, and µm and a constant core size of 32 µm The insert for each image shows the SRR elements ... based terahertz devices outperform their conventional counterparts However, their performance is restricted to a narrow spectral band that is not suitable for the broadband terahertz system due to ... control and manipulate terahertz waves 1.4 Organization of thesis This thesis is directed towards to the design, fabrication, and characterization of terahertz metamaterials in 2D and 3D forms and...

Ngày tải lên: 10/09/2015, 08:40

... film formed on GaN The Ga-ON and Ga-N bond energies are located at 20 and 19.6 eV, respectively (a) Ga-ON peak is observed for the sample without VA and SiH4 treatment, and (b) is absent for the ... and characterized at (c) 300 K and (d) 460 K Similar measurements at (e) 300 K and (f) 460 K were performed for samples which received in situ 300 C vacuum anneal and 400 C SiH4 treatment For ... wafer and Si (111) substrate removal, and BCB stands for benzocyclobutene (c) GaN/AlGaN buffer bonded to a glass wafer (d) Final device structure after releasing the carrier wafer G, S and D stand...

Ngày tải lên: 10/09/2015, 09:11

... carrier drift velocity and mature design and fabrication technology for optical devices Therefore, integration of high performance III-V photodetectors onto the Si platform by flip-chip bonding ... SNDL students for their indispensable help for my research work and for the great academic atmosphere created My deepest love goes out to my parents who have given me their support and encouragement ... transit time  FW HM  d for Si/SiGe and SiGe  buffer are 3084 cm2/Vs and 377 cm2/Vs respectively Inset shows the impulse response under V reverse bias for Si/SiGe and SiGe buffer samples ...

Ngày tải lên: 10/09/2015, 15:47

... R-279-000-140-592, and R-279-000-184-112 Last but not the least, I must express my special thanks to my husband, Feng Zhao, for his unwavering and unconditional love and support My parents and parents’ ... choosing the membrane formation procedures 1.3.2 Membrane formation and modification 1.3.2.1 Membrane formation Membrane structure, another factor determining the membrane performance for specific separation, ... thickness for the fibers heat treated at 200oC for hours before coating……… ….… 168 Fig 7.9 He/N2, O2/N2 selectivity as function of the outer layer thickness for the fibers heat treated at 200oC for...

Ngày tải lên: 12/09/2015, 11:24

... (NPs) and the background film formed by laser annealing 68 Fig 3.11 PL from the background Si NC films before and after laser annealing at a laser fluence of 100 mJ/cm2 (a) PL spectra and (b) ... as-deposited and (b) after thermal annealing in high vacuum for 60 at a temperature of 800 °C 135 Fig 5.6 Optical bandgaps and PL peak energies of the SiOx nanostructured films formed by PLD ... analyzer and a nozzle jet can obtain uniform NCs with little size -9- Chapter 1: Introduction and Literature Survey deviation Thus, PLD is thought to be a matured method and is extensively used to form...

Ngày tải lên: 12/09/2015, 11:25