ID: 58323
Title: Tropical dry deciduous forest stand variable estimation using SAR data
Author: Varghese Ouseph Alappat, Ashok Kumar Joshi, Y V N Krishnamurthy
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: SAR, forest and mensuration
Abstract: Optical remote sensing data have been extensively used to derive biophysical properties that relate forest type and composition. However, stand density, stand height and stand volume cannot be estimated directly from optical remote sensing data owing to poor sensitivity between these parameters and spectral reflectance. The ability of microwave energy to penetrate within forest vegetation makes it possible to extract information on both the crown and trunk components from radar data. The type of polarization employed determines the radar response to the various shapes and orientations of the scattering mechanisms within the canopy or trunk. This study mainly presents experimental results obtained with airborne E-SAR using polarimetric C and L bands over the tropical dry deciduous forest of Chandrapur Forest Division, Maharastra. A detailed documentation of the relationship between SARC & L bands backscattering and forest stand variables has been provided in the present study through linear correlation. Linear correlation of the single channel SAR derived estimates with the field measured means show a good correlation between L HV backscattering coefficient with stand volume (r2 = 0.71) and L HH backscattering coefficient with stand density (r2 = 0.75). The results imply that SAR data has significantly potential for stand menstruation in operational forestry.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58322
Title: Ground water quality maps of Paravanar river sub basin, Cuddalore district, Tamil Nadu, India
Author: Aravindan S, Shankar K
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Groundwater, quality, spatial interpolation, stiff diagram
Abstract: Ground water is an excellent solvent, which dissolves chemicals ions as it moves through rocks and subsurface soil. This leads to more mineralization in groundwater than surface water. The objective of the present study is to examine the groundwater quality of the Paravanar River Sub-basin, Cuddalore district, Tamil Nadu, India. The Electrical Conductivity (EC) values ranges between 160 and 2,580 ?S/cm in groundwater samples. The highest value of 2,580 ?S/cm was recorded in wells near the coast, pH values ranges from 7.2 to 8.6. NNE and southern part of the study area has low pH values, rest of the area represents the alkaline nature of groundwater. In south eastern part of the study area alkali values are slightly higher but it is within WHO ' s tolerable limits. The spatial distribution of chloride concentration shows that Meenatchipettai, Vazhisothani palayam and Allapakkam represents maximum Cl2 concentration of 527, 320 and 374 ppm, which is above ISI drinking standards of 250 ppm. Increase in isochlore is observed from the coast up to the Neyveli lignite mine. Nitrate concentration of groundwater samples ranges from 0.1 mg/l to 64 mg/l. As most of the study area is cultivated, fertilizers used for agriculture may be the cause for increase in concentration of nitrates in few concentrated locations.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58321
Title: Assessing the priorities for sustainable forest management in the Sikkim Himalaya, India: A remote sensing based approach
Author: Sandeep Tambe, M L Arrawatia, Narpati Sharma
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Eastern Himalaya, Spatial anlaysis, change detection, vegetation mapping, Oak forest
Abstract: Sikkim is a small, mountainous, Indian state (7,096 km2) located in the eastern Himalayan region. Though a global biodiversity hotspot, it has been relatively less studied. A detailed forest type, density and change dynamics study was undertaken, using SATELLITE remote sensing data and intensive field verification. The landscape was found to be dominated by alpine and nival ecosystems, with a large portion above the tree line, considerable snow cover, and a sizeable area under forest cover (72%, 5,094 km2). A total of 18 landscape components including 14 vegetation classes were delineated, with the major ones being oak forest, alpine meadow, alpine scrub, conifer forest and alder-cardamom agro-forestry. Of the 3,154 km2 of forests below the tree line, 40% were found to be dense (>40% tree canopy cover). A sizea portion of the non dense forests below the tree line was contributed by the degradation of oak forests, which was confirmed by change detection analysis. However on a positive front over the past decade, ban on grazing and felling of trees in forests has been implemented. In order to expand the extent of dense forests, further efforts are needed for the restoration of oak forests such as fire protection, providing alternatives to firewood use, promotion of alder-cardomom agro-forestry in the private lands and protection of the small-sized, fragmented forest patches in the subtropical belt.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58320
Title: Direct and indirect validation of potential fishing zone advisory off the coast of Uttara Kannada, Karnataka
Author: Sanjeev P Deshpande, K V Radhakrishnan, U Gopalakrishna Bhat
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Remote sensing, chlorophyll, sea surface temperature, potential fishing zone, validation
Abstract: The technique of predicting Potential Fishing Zone using satellite derived sea surface temperature and chlolorphyll is becoming an important aspect for the fishermen. In the present study an attempt has been made to compare fish density/catch per unit effort in the areas predicted by Satellite imagery and available to fishermen via electronic display boards at the fish landing centers of Uttara Kannada district, Karnataka with those of non predicted areas. Direct and Indirect validation was done. Direct method means comparing the catch using fishing vessels simultaneously in the notified region with that of catch from non notified region. And in indirect method by comparing catch data from landing centers on notified days with that of non notified days. Direct validation off Karwar showed that catch was significantly higher in notified (PFZ) area with high densities as compared to non notified (non PFZ) regions. When comparisons of landing center data of Karwar, Tadadi and Bhatkal are done it is evident that in all the centers during the period under study, higher catches were observed on notified days than non notified days except in Bhatkal centre in 2009-10. There by validating the accuarcy of PFZ predictions and economic gains to fishermen.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58319
Title: Mapping of lateritic soils of midlands in Kerala using Resourcesat-1 LISS -III and SRTM DEM data
Author: Milind R Wadodkar, T Ravisankar
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Lateritic soils, soil-landscape model, remote sensing, SRTM DEM
Abstract: Lateritic soils of Mathamangalam, Kannur district, located in midlands of Kerala, were morphologically studies, characterized, classified and mapped at 1:50,000 scale using remote sensing techniques. The terrain of the study area being hilly and covered with perennial vegetation, soil-landscape model was applied. For this purpose physiographic information was inferred from SRTM DEM, Resourcesat-1 LISS-III satellite image and topographical maps. The interpreted units were validated in the field and characterized through soil-site examination, soil profile study and soil analysis. The study indicated that the lateritic soils of midlands of Kerala vary in physical, chemical and morphological properties in relation to micro-relief. Soils developed on moderately steeply sloping side slopes (15-30% slope) are deep, moderately well drained with gravelly clay textured, where as the soils developed on moderately slopping side slope (10-15% slope) are very deep and well drained. The soils of valleys are very deep, moderately well drained with fine texture. Very gently sloping (1-3%) laterite plateau tops have extremely shallow soils associated with rock outcrops. These soils mainly belong to Order Ultisols followed by Inceptisols and Entisols. These were further grouped up to Family and Series level by tentatively establishing seven soil series. This study helps in understanding the behaviour of lateritic soils of mid-lands of Kerala, which can be useful in generation of interpretative maps and in optimizing the land use.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58318
Title: Soil resource databse at village level of rdevelopment planning
Author: Milind R Wadodkar, T Ravisankar
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Large-scale soil mapoing, village development plan, crop suitability, fertility assessment, soil health card, high-resolution remote sensing data
Abstract: A study was carried out in village Mohamadabad, Nalgonda district, Andhra Pradesh to demonstrate the potential of high-resolution remote sensing data in generating soil resource database at village level that would facilitate natural resource developmental planning. For this study, detail soil resource database was generated by interpreting IRS Resourcesat-1 LISS-IV + Cartosat-1 merged data and by undertaking soil survey and soil analysis. This database was integrated with cadastral map and was analysed for preparation of an action plan for the village that included recommendation on suitable crops, soil and water conservation measures and distribution of soil health card to farmers. The study indicates that the LISS-IV + Cartosat-1 merged satellite data helps in mapping soils at phase level and in delineation of more number of pure soil mapping unis i.e consociations at 1:10,000 scale. The plot-wise resource potential and constraints reveals that significant inter and intra-field soil variability exists. Soil fertility assessment indicates that the soils of the village are low to medium in fertility (available NPK Content) and micronutrients like copper, manganese and iron content is above the critical level for optimum growth of crops while zinc content is less than the critical leval.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58317
Title: Synergistic application of optical and radar data for archaeologial exploration in the Talakadu region, Karnataka
Author: Mandyam B Rajani, Satadru Bhattacharya, A S Rajawat
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Archaeological exploration, Radar, Buried channel, Talakadu
Abstract: Talakadu is a well known historic place situated on bank of the river Cauvery in Mysore district of Karnataka. The place is close to concave side of a prominent meander where large amount of sand has accumulated. It is believed that after construction of a reservoir upstream, sand was exposed to wind action burying the structures of Ganga dynasty and other later kingdoms. A number of buried sites have been identified by archaeological excavations conducted so far. Presently the area forms sand dunes with thick plantation cover. Analysis of RADAR data (fine beam RADARSAT and ENVISAT ASAR) led to identifying a hitherto unknown buried channel through the Old Talakadu town adjoining the excavated archaeological sites. The study suggests that RADAR penetration through the OId Talakadu town adjoining the excavated archaeological sites. The study suggests that RADAR penetration through the plantation canopy seems to have occurred as observed by comparing with corresponding optical data of LISS-IV. Below the canopy, sand and shrubs on top of the channel (topographically low area) are acting as smooth surface providing dark tone on radar imagery. During field validation GPS was extensively used to navigate through the forest canopy and located the buried channel, excavated archaeological sites as well as other anomalous pattens. Synergistic applciation of optical (RESOURCESAT-1 LISS-IV and CARTOSAT-1&2) and radar (fine beam RADARSAT and ENVISAT ASAR) data led to identifying remote sensing based guides for archaeological exploration . Integration of knwon archaeological sites with the identified anomalous patterns was done in GIS environment. This study adds on to the knowledge base of the site and compliments already known information and suggested new areas for further archaeological exploration.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58316
Title: Application of DEM, Remote senisng and Geomorphic studies in identifying a recent [or perhaps Neogene? ] upwarp in the Dibru river basin, Assam, India
Author: Jogendra Nath Sarma, Shukla Acharjee, Chandraditya Gogoi
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Geomorphic anomaly, morphotectonic, upwarp, Dibru river, valley incision
Abstract: The Dibru river basin of Assam is investigated to examine the influence of active structure by applying an integrated study on geomorphology morphotectonics, subsurface structure, Digital Elevation Model (DEM) using topographic map, IRS 1D LISS III, IRS P6 LISS III, SRTM, seismic and subsurface data. Seismic data reveals existence of an upwarmp and an important fault in the basement around the central and eastern parts of the Dibru basin, respectively. The infleunce of these structures is well observed on all the younger formations inferring their active nature possibly till the Recent Period. Existence of fluvial anomalies, viz. annular drainage pattern, lineaments, abrupt changes in the direction of river course, beheaded stream and valley incision infer role of structural control on the fluvial features of this basin. Most commonly used indices for morphotectonic analysis, viz. basin elongation ratio (Re), transverse topographic symmetry (T), asymmetric factor (AF), valley floor width to valley height ratio (Vf) have been used to identify the evidences of active structures in the area. The values of Re indicated tectonically active, T indicated an asymmetric nature, AF indicatred tilting and Vf indicated active incision in the Bibru basin. The DEM, profiles across the valley and superimposed longitudinal profiles of incised channel bed and valley shoulder of the Dibru clearly reveal valley incision by the river. Three large paleochannels located in different parts of the basin had their headwaters towards east at the common source, i.e, the Diyun river. These paleochannels had been resulted when their headwaters avulsed to create new rivers due to affect of the subsurface structures during Recent (or perhaps Neogene?) Period.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58315
Title: Hyperspectral radiometry to characterise dunite alteration and magnesite deposits of Salem, South India
Author: Satish Kumar Jayabal, Sanjeevi Shanmugam, Govindan Sukkiri
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Hyperspectral radiometry, Geochemistry, magnesite, carbonate, iron absorption, Salem, India
Abstract: This work reports the results of insitu surveys, hyperspectral-radiometry and geochemistry for dunite-alteration and magensite mapping in the Salem, southern India. Spectral parameters such as the strength of absorption in the 865 nm and 2,300 nm range for Fe2+ and CO32- respectively, and the position of absorption trough were derived from the laboratory spectra for 13 samples. It is observed that dunite alteration and conversion to magnesite produce measurable changes in teh VIS-NIR-SWIR spectra due to a tansition from the silicate-dominated rocky composition to carbonate-dominated industrial mineral composition. Relationship between the spectra and mineralogy suggests that we can identify the varieties of magnesite using hyperspectrla radiometry.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58314
Title: Macro landslide hazard zonation mapping - Case study from Bodi - Bodimettu Ghats section, Theni district, Tamil Nadu- India
Author: M Kannan, E Saranathan, R Anbalagan
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Landslides, LHEF, TEHD, LHZ
Abstract: Landslide is a common natural hazard that usually occurs in mountinous areas. Rapid urban development and high traffic intensity movements have been hampered to a great extent by phenomenon of landslides. In Ghat section, vertical cuttings and steep slopes are induced sloped failures. An assessment of landslide hazards is therefore a prerequisite for sustainable development of the hilly region. In the present study, Macro Landslide Hazard Zonation was carried out in the Bodi-Bodimettu ghats section, Western Ghats, Theni district. The slope spreads over an area of about 10.09 sq km encompassing Puliuttu Ar. sub-watershed. The study was made with help of different types of data including Survey of India topographic map, geology map, important inherent factors like lithology, structure, slope morphometry, relative relief, land use/land cover and hydrogeological conditions using Bureau of Indian Standard (BSI 14496 (Part 2): 1998) and related thematic maps. Based on the thematic layers, landslide hazard evaluation factor (LHEF) and total estimated hazard (TEHD) were calculated and the macro hazard zonation map was prepared. Landslide Hazard Zonation (LHZ) of the terrain shows that out of 17 facets, facets 1 to 5 and 8 falls under Moderate Hazard zone category and facets 6, 7 adn 9 to 17 under the High Hazard zone category. The field study with further analysis for hazard concluded that about 68% of the total area falls in the high hazard zone.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58313
Title: Hyperspectral radiometry to quantify the grades of iron ores of Noamundi and Joda mines, Eastern India
Author: Magendran Thangavelu, Sanjeevi Shanmugam, Arya Kumar Bhattacharya
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Hyperspectral radiometry, spectral curves, Empirical model, Iron ore grade
Abstract: This paper present the results of a preliminary study to assess the potential of the visible, NIR and SWIR energy of the EMR in differentiating iron ores of different grades in a rapid manner using hyperspectral radiometry. Using different iron ore samples from Noamundi and Joda mines, Jharkhand and Orissa, states of India, certain spectro-radiometric measurements and geochemical analysis were carried out and the results have been presented. It was observed that the primary spectral characteristics of these iron ores lie in the 850 to 900 nm and 650-750 nm regions. The spectral parameters for each curve used for studying the iron ores are: (i) the slopes of the spectral curve in 685-725 nm region; (ii)position of the peak with respect to wavelength in 730-750 nm region and (iii) radius of curvature of the absorption trough in teh 850-900 nm region. Comparison of these spectral parameters and the geochemistry of the samples indicates that the position of the peak of the curve in 730-750 nm region shifts towards longer wavelength with increasing iron oxide content, while the slope of the curvature in the 685-725 nm region has a strong negative correlation with the iron oxide content of the samples. Similarly, a strong negative correlation is observed between the radius of curvature of the 850-900 nm absorption trough and the iron oxide content. Such strong correlations indicate that hyperspectral radiometry in the visible and NIR regions can give a better estimate and quantification of the grades of iron ores. This study has demonstrated that generation of empirical models using hyperspectral radiometric techniques is helpful to quantify the grade of iron ores with limited geochemical analysis.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58312
Title: Analysis of trophic state index of Nainital lake from Landsat-7 ETM data
Author: A K Mishra, Neha Garg
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Trophic state index, Secchi disk depth, ETM
Abstract: Trophic State Index (TSI) of Nainital lake has been determined using secchi disk transparency as well as using Landsat 7 ETM bands. The insitu water quality parameters like pH and dissolved oxygen (DO) have been measured using multiparameter water quality instrument TROLL 9500. Various interpolation techniques have been tested and the best one has been applied to prepare the water quality images of Nainital lake. The analysis of Landsat images have shown that the lake water is in eutrophic condition from the year 2000 to 2010. However, the trophic state index values are found to be relatively less during the year 2006 to 2008. This may be due to the lake restoration programmes undertaken by the Lake Development Authorities.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58311
Title: Comparison of inherent optical properties (IOPs) in open and coastal waters of Arabian sea using In-situ bio-optical data
Author: P V Nagamani, Prakash Chauhan, Nivedita Sanwlani
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Inherent optical properties (IOPs), bio-optical, in-situ data
Abstract: The two main inherent optical properties (IOPs) namely absorption and back scattering coefficients were estimated using a quasi analytical algorithm (QAA) for open and coastal ocean waters of Arabian Sea. Absorption due to gelbstoff and back scattering due to the particulate matter was calculated using the quasi analytical algorithm for all the in-situ measured reflectance spectra collected in the Arabian Sea. A comparative study was made to study the spectral variability of reflectance spectra in open as well as coastal waters of Arabian Sea. Spectral analysis was made for the absorption and back scattering coefficients calculated using the QAA for both open and coastal waters. The absorption coefficient in the open ocean waters vary from a minimum value of 0.029 to a maximum value of 0.445 and it varies from a minimum value of 0.081 to a maximum value of 4.000 for the coastal waters of Arabian Sea. Absorption due to gelbstoff or the CDOM ag( ? ), calculated for the Arabian Sea waters show a variation of 0.000202 to 0.112437 for open ocean waters and it varies from 0.002848 to 2.8936 for coastal waters of Arabian Sea. Particulate back scattering coefficient for opern ocean waters vary from 0.0000307 to 0.006575 whereas bbp( ? ) vary from 0.000167 to 0.026014 for coastal ocean waters. The minimum slope for the open ocean waters is 0.989 and maximum value of 2.147 (average value of 1.7) was observed; whereas a minimum value of 0.046 and a maximum value of 1.201 (average value of 0.6) were observed from the in-situ spectra for coastal waters of Veraval. The slope ' Y ' estimated from the model is 1.957 for opern ocean waters and 0.515 for coastal waters collected in the Arabian Sea.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58310
Title: Comparison of two data smoothing techniques for vegetation spectra derived from EO-1 hyperion
Author: Anshu Miglani, Shibendu S Ray, D P Vashishta, Jai Singh Parihar
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Hyperspectral, FFT, Savitzky-Golay, smoothing, vegetation spectra, noise
Abstract: Hyperspectral data are generally noisier compared to braodband multispectral data because their narrow bandwidth can only capture very little energy that may be overcome by the self-generated noise inside the sensors. It is desirable to smoothen the reflectance spectra. This study was carried out to see the effect of smoothing algorithms - Fast-Fourier Transform (FFT) and Savitzky-Golay (SG) methods on the statistical properties of the vegetation spectra at varying filter sizes. The data used in the study is the reflectance spectra data obtained from Hyperion sensor over an agriculturally dominated area in Modipuram (Uttar Pradesh). The reflectance spectra were extracted for wheat crop at different growth stages. Filter sizes were varied between 3 and 15 with the increment of 2. Paired t-test was carried out between the original and the smoothed data for all the filter sizes in order to see the extent of distortion with changing filter sizes. The study showed that in FFT, beyond filter size 11, the number of locations within the spectra where the smooth spectra were statistically different from its original counterpart increased to 14 and reaches 21 at the filter size 15. However, in SG method, number of statistically different locations were more than those found in the FFT, but the number of locations did not changing drastically. The number of statistically disturbed locations in SG method varied between 16 and 19. The optimum filter size for smoothing the vegetation spectra was found to be 11 in FFT and 9 in SG method.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58309
Title: Evaluating the sensitivity of Image fusion quality metrics to image degradation in satellite imagery
Author: Farhad Samadzadegan, Farzaneh DadrasJavan
Editor: Dr George Joseph
Year: 2011
Publisher: Indian Society of Remote Sensing, Vol 39, No42, December 2011
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of the Indian Society of Remote Sensing
Keywords: Image fusion, quality assessment, quality metrics, image registration accuracy, High resolution satellite imagery
Abstract: Referring to the high potential of topographic satellite in collecting high resolution panchromatic imagery and high spectral, multi spectral imagery, the purpose of image fusion is to produce a new image data with high spatial and spectral characteristics. It is necessary to evaluate the quality of fused image by some quality metrics before using this product in various applications. Up to now, several metrics have been proposed for image quality assessment; which are also applicable for quality evaluation of fused images. However, it seems more investigations are needed to inspect the potentials of proposed Image Fusion Quality Metrics
(IFQMs) to registration accuracy, especially in high resolution satellite imagery. This apper focuses on such studies and, using different image fusion quality metrics, experiments are conducted to evaluate the sensitivity of such metrics to a set of high resolution satellite imagery covering urban areas. The obtained results clearly reveal that these metrics sometimes do not behave robust in the whole area and also their obtained results are inconsistence in different patch areas in comparison with the whole images. These limitations are in minimum situation for an image quality metric such as SAM and are completely tangible for image quality metrics such as ERGAS in case of multi modal and DIV and CC from mono modal category.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None