81 research outputs found
ACM Based ROI Extraction for Pedestrian Detection with Partial Occlusion Handling
AbstractPedestrian detection in video surveillance systems is an integral part of Advanced Driver Assistance Systems (ADAS). In this paper, a new method for efficient pedestrian detection is proposed. The proposed method uses ACM (Active Contour Model) for efficiently locating pedestrian position in each video frame and thereby speeding up the detection time. This method uses a combination of HOG (Histogram of Oriented Gradients) and LBP (Local Binary Patterns) as features for training a two level linear SVM (Support Vector Machine). The proposed method handles partial occlusion using a two-level SVM classifier and eliminates multiple detection using Non Maximum Suppression (NMS) algorithm. The performance analysis is done using INRIA Person dataset and CVC Partial Occlusion dataset; and it is found that the proposed method gives promising results in terms of detection accuracy and detection speed
Reproduction in the deep-sea penaeoid shrimp Aristeus alcocki Ramadan, 1938 (Decapoda: Penaeoidea: Aristeidae) from southwestern India
The Arabian red shrimp, Aristeus alcocki Ramadan, 1938, is one of the targets of commercial
trawlers operating since 2000 along the Indian coasts at depths of 200тАУ850 m. We report
for the first time on the reproductive biology, insemination frequency, ovarian maturation,
gonadosomatic index (GSI), size at maturity, and fecundity of A. alcocki investigated macroscopically
and validated histologically using monthly trawl samples from the southwestern
coast of India. Females have an open thelycum with five gonad developmental stages (I to V)
and two stages (I and II) in males. A total of 4,170 specimens were examined and 68.6% of
the females had been inseminated (carapace length (CL) 22.0тАУ53.0 mm), predominantly during
January to May. Females in stage I (immature) measured on average CL 25.5 ┬▒ 0.87 mm,
those in stages IV and V (mature) CL 41.5 ┬▒ 0.62 mm. Immature males were smaller, mean
CL 20.5 ┬▒ 0.5 mm. Size at first sexual maturity for females was estimated as CL 35.07 mm
(total length (TL) 120тАУ170 mm) and the inseminated specimens (CL50is) were mature at CL
31.45 mm using a non-linear method. The smallest mature female was CL 35 mm, whereas
the size at maturity (CL50ms) of males was estimated as CL 19.6 mm (TL 75тАУ96 mm). We also
report synchronous oocyte development and continuous spawning activity with a peak during
January to April. Information on the reproduction of this deep-water shrimp will help fishery
managers estimate the stock sustainability and develop resource management measures
Electron beam induced deposition of silacyclohexane and dichlorosilacyclohexane: the role of dissociative ionization and dissociative electron attachment in the deposition process
We present first experiments on electron beam induced deposition of silacyclohexane (SCH) and dichlorosilacyclohexane (DCSCH) under a focused high-energy electron beam (FEBID). We compare the deposition dynamics observed when growing pillars of high aspect ratio from these compounds and we compare the proximity effect observed for these compounds. The two precursors show similar behaviour with regards to fragmentation through dissociative ionization in the gas phase under single-collision conditions. However, while DCSCH shows appreciable cross sections with regards to dissociative electron attachment, SCH is inert with respect to this process. We discuss our deposition experiments in context of the efficiency of these different electron-induced fragmentation processes. With regards to the deposition dynamics, we observe a substantially faster growth from DCSCH and a higher saturation diameter when growing pillars with high aspect ratio. However, both compounds show similar behaviour with regards to the proximity effect. With regards to the composition of the deposits, we observe that the C/Si ratio is similar for both compounds and in both cases close to the initial molecular stoichiometry. The oxygen content in the DCSCH deposits is about double that of the SCH deposits. Only marginal chlorine is observed in the deposits of from DCSCH. We discuss these observations in context of potential approaches for Si deposition.CWH likes to thank Luc van Kessel, Kerim Arat and Sebastiaan Lokhorst for their assistance with the Monte Carlo simulations of Figure 10. OI acknowledges supported from the Icelandic Center of Research (RANNIS) Grant No. 13049305(1-3) and the University of Iceland Research Fund. RKTP acknowledges a doctoral grant from the University of Iceland Research Fund and financial support from the COST Action CM1301; CELINA, for short term scientific missions (STSMs)Peer Reviewe
A brief note on portunid crab, Charybdis (Goniohellenus) omanensis septentrionalis from southwest coast of India
Crustacean Fisheries Division of ICAR-CMFRI, has
recently taken up a two year programme on
experimental trawling using fishing vessel F.V. Silver
Pompano. Samples were collected from different
bathymetric stations off Kochi and Alappuzha during
fortnightly intervals. Samples in the last fortnight
of August 2016, collected at a depth of 65m off
Alappuzha, included a good number of Charybdis
(Goniohellenus) smithii along with fishes and other
crustaceans. While segregating the samples of
swarming crab C. (G.) smithii, approximately 5 kg
of small sized Charybdis sp. was also collected. This
species was not included in the earlier samplings of
the programme as well as in the commercial fishery
landings. Hence detailed studies were carried out
and found the species is C.(G.) omanensis
septentrionalis, a new record in the Indian seas
Scope for light assisted fishing in Southeastern Arabian Sea
Scope for light assisted fishing in
Southeastern Arabian Se
Paralarva of the sharpear enope squid Ancistrocheirus lesueurii (Oegopsida: Ancistrocheiridae) in the southeastern Arabian Sea
First morphological description of an early stage paralarva of the
sharpear enope squid Ancistrocheirus lesueurii from southeastern
Arabian Sea is presented. The paralarva was collected at dusk by
using surface tows of zooplankton nets in February 2012. The
presence of paralarva A. lesueurii indicates that this species
completes its life cycle in this sea. A comparison of the arm
formula of paralarva and adult stages shows a major change in
the formula during metamorphosis to adult
Development of bivalve farming as a source of income generation for womenтАЩs self-help groups in coastal India
The existing technologies of mussel and oyster farming were converted into an income-generating
activity for coastal fishers, particularly for womenтАЩs self-help groups. As a result of a concerted
approach, coupled with novel extension techniques, commercial mussel and oyster farming
became established in the States of India, Kerala and susequently in Karnataka. Production in 2009
was over 20 000 tonnes making India one of the top ten bivalve farming countries in Asia.
Innovations in these bivalve farming technologies simplified them, which resulted in an increase
in profitability and made them attractive to farmers. During this process, the entire gamut of
bivalve farming operations such as site identification, seed and spatfall calendars, remote setting,
mechanization in seeding and harvesting, quality and depuration protocols, ready-to-eat and
ready-to-cook products, organic farming protocols and environmental impact assessments were
worked out. The success in commercializing the technologies was mainly a result of a unique
synergy that was actively pursued and developed by technology developers, promoters, and credit
advancers. This development scenario can serve as a role model for other states and developing
nations where a similar hydrological, social, and market environment exists
Know...The Master of the Arabian Sea Purple-back Flying Squid Sthenoteuthis oualaniensis
Sthenoteuthis oualaniensi
Observations on the monsoon prawn fishery in Kerala
The ban on trawling in Kerala from June 15th to
July 30th coincides with the southwest monsoon.
During the period fishermen venture into the sea
with their traditional/motorised crafts and gears
such as thermocol boats (Alapuzha) and
Thanguvallom (Ernakulam and Thrissur). The latter
is operated with outboard engines and operate up
to 8 km from the shore. The thermocol boats fish
very near the shore (up to 3 km). The gear operated
are ring seines or thangu vala and gill nets. The
unique phenomenon in the monsoon season known
as mud-bank or тАШchakaraтАЩ is characterised by calm
areas close to the shore
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