IMAGE FORGERY DETECTION USING DYADIC WAVELET TRANSFORM

In this paper, we propose a blind copy move image forgery detection method using dyadic wavelet transform (DyWT). DyWT is shift invariant and therefore more suitable than discrete wavelet transform (DWT) for data analysis. First we decompose the input image into approximation (LL1) and detail (HH1) subbands. Then we divide LL1 and HH1 subbands into overlapping blocks and measure the similarity between blocks. The key idea is that the similarity between the copied and moved blocks from the LL1 subband should be high, while the one from the HH1 subband should be low due to noise inconsistency in the moved block. We sort pairs of blocks based on high similarity using the LL1 subband and high dissimilarity using the HH1 subband. Using thresholding, we obtain matched pairs from the sorted list as copied and moved blocks. Experimental results show the effectiveness of the proposed method over competitive methods using DWT and the LL1 or HH1 subbands only

Influence of abiotic factors on behaviour and adult emergence pattern of coconut white grub, Leucopholis coneophora Burmeister (Coleoptera: Scarabaeidae)

Leucopholis coneophora Burmeister is a subterranean pest associated with coconut based cropping systems in south India. Feeding damage causes yellowing of fronds and yield reduction. To develop appropriate IPM strategy a basic knowledge on insect behaviour is essential. Four years studies indicated that, adult emergence of L. coneophora was commenced with summer shower in April in Kerala. Delay in summer shower delayed the emergence. After a pause in May, the emergence resumed with the setting of south west monsoon in June. The beetles did not emerge during dry spells in between the rainy days, when the soil temperature (at 10 cm depth) was ≥34.5 °C. Emergence of the beetles started at an illuminance of 124.37 ± 75.5 l in evening and remained active till 2 ± 0.4 l with a maximum swarming at 32.6 ± 15.1 l. Female emergence and mating occurred at 12.04 ± 8.1 l. Female based sex pheromone mediated communication is evident. Strong competition among the males for mating with emerging female, which was evident by a wider operational sex ratio in the initial period (1:10.11) that narrowed down to 1:4.33 in later days. The beetles neither congregate on any host plant nor exhibit phototaxis. Number of beetles entrapped in light traps varied from 1.5–16.5% and hand picking is highly significant over light trapping. Hence hand picking of beetles daily in the evening for 2 weeks commencing from the onset of south west monsoon in Kerala, in Indian subcontinent is suggested as a tool in IPM

Group dynamics effectiveness index- A Measure of Gender Centric Approach in Mussel Farming in Coastal Karnataka, India

Today’s extension trends represent a paradigm shift from top down approach to bottom up approach wherein the farmer is the central figure in the technology adoption and technology refinement process. Research and ex-tension organizations have moved from working with individual farmers to collaboration with groups. Members of a group collectively take part in accessing and sharing resources, in decision making, partaking of benefits, than while acting individually. The Participatory Action model (PAM) was used for the transfer of technology to Mussel farmers, through a six step process of planning and implementation. Mussel farming connotes the scien-tific culture of edible bivalves which belong to the family “Mytilidae”. The economic by product of mussel farming is the mussel meat which has considerable commercial value and fetches additional source of income for fisher-men during the lean fishing seasons. Mussel faming in India is carried out as individual ownership, family owner-ship and ownership by self-help groups. In the present study, the Participatory Action Model was used as a meth-od to organize the self-help groups involved in mussel farming. This model aims at development of group capaci-ties through involvement of the group members in planning, implementation, review and reflection process in mussel farming undertaken on a group basis. The study aimed at assessing the Group Dynamics Effectiveness of men and women mussel farmers in their respective groups. The findings revealed that the overall Group Effec-tiveness Index (G.E.I) was 63.03, which has been achieved, within a short period of three years of technology transfer. Results of Chi-square analysis revealed that there was significant association between men and women farmers in the groups with respect to group dimensions such as influence, styles of influence, decision making, task function, feelings, norms, interpersonal trust and group achievements at (P<0.05). The findings of the discri-minant analysis revealed that the group dimensions which significantly discriminated the men and women farm-ers, were achievements of group, norms, interpersonal trust and empathy. The study implies that there is tremen-dous potential for harnessing the group efforts for successful adoption of the technology and future participatory efforts should be directed at strengthening these specific dimensions which govern the group behaviour and which in turn accentuate the G.E.I

Major and minor fisheries harbours of India 2. Fisheries harbours and fishery in Uttara Kannada district of Karnataka and Goa States

Karnataka Is the fifth largest producer of marine fish In the country. The total coastal length of Karnataka is 300 km, and has got a rich continental shel

Major and minor fisheries harbours of India 3. The fisheries harbours and fishery in south Karnataka

The status of the fisheries harbours, number and type of fishing vessels operating from minor and major fisheries harbours in the region are given in Table 1. There are 3 major harbours and 4 minor harbours in the region

Study on the design and operation of a traditional winch in fishery technology

Majority of the non-mechanized craft in Karnataka are wooden and they are operated mainly in beach landing centers which hardly have any berthing facility. These boats are operating on daily basis and are hauled on to the beach after the operatio to protect it from fouling organisms. The fishermen of Karnataka came up with the idea of wooden winch/ capstan named “Dhowr” for hauling the boat on shore. The following paper documents and report for the first time, the use of such unique, eco-friendly wooden capstan, “Dhowr” which is in operation in traditional beach landing fishing village of Karnataka

Record of stranded whales along Karnataka coast

A whale was stranded in the beach of Guijerbettu, Udupi district, Karnataka on 21.12.2001 . The whale was found in live condition. Thelocal person tried to rescue it but was in vain and later it died. The whale was identified as Balaenopteramusculus (Blue whale). Few vertebrae have been collected and preserved in the museum of Mangalore Research Centre of CMFRI for future identification up to the species level. Another whale (genus : Balaenoptera) was stranded in Kota, Udupi district, Karnataka near the shore of Arama temple on 11.08.2004 in decayed condition

'Dhowr'- A Revisit to the design and operation of indigenous machinery in fishery technology

Traditionally, the fishing crafts are hauled on to the beach with manpower after the fishing cruise. Many of the beach-landing centers use manpower for hauling the boats. But the change in beach profile due to changing weather condition makes it extremely cumbersome for hauling the boat using manpower alone. Moreover, the labour force has also been getting scarce in many fishing villages. A wooden winch was developed by the fishermen of Dakshina Kannada, several decades back. The fishermen in Keni Village of Uttar Kannada District worked on this insight and came out with a modified manually working wooden winch/ capstan and named “Dhowr”. This device was widely accepted and number of units came up in most of the beach landing fishing villages of Uttar Kannada. With this background, it was felt necessary that a detailed study be conducted to document and report the construction and operation of unique and eco-friendly wooden capstan, “Dhowr” along with the benefits to the fishermen

Neoplasia in oil sardine from Palk Bay

During a routine fishery survey programme at Irumeni fishing village, Palk Bay on 03rd December 2016, a single specimen of oil sardine Sardinella longiceps with neoplasia, measuring 163 mm in total length (TL) and weighing 119 gram was collected from the gillnet landings. The specimen was a female with empty stomach

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