Abstract
Abstract. In this paper a virtual laboratory for the Satellite Image Processing and Analysis (v-SIPAL) being developed at the Indian Institute of Technology Bombay is described. v-SIPAL comprises a set of experiments that are normally carried out by students learning digital processing and analysis of satellite images using commercial software. Currently, the experiments that are available on the server include Image Viewer, Image Contrast Enhancement, Image Smoothing, Edge Enhancement, Principal Component Transform, Texture Analysis by Co-occurrence Matrix method, Image Indices, Color Coordinate Transforms, Fourier Analysis, Mathematical Morphology, Unsupervised Image Classification, Supervised Image Classification and Accuracy Assessment. The virtual laboratory includes a theory module for each option of every experiment, a description of the procedure to perform each experiment, the menu to choose and perform the experiment, a module on interpretation of results when performed with a given image and pre-specified options, bibliography, links to useful internet resources and user-feedback. The user can upload his/her own images for performing the experiments and can also reuse outputs of one experiment in another experiment where applicable. Some of the other experiments currently under development include georeferencing of images, data fusion, feature evaluation by divergence andJ-M distance, image compression, wavelet image analysis and change detection. Additions to the theory module include self-assessment quizzes, audio-video clips on selected concepts, and a discussion of elements of visual image interpretation. V-SIPAL is at the satge of internal evaluation within IIT Bombay and will soon be open to selected educational institutions in India for evaluation.
Highlights
At the user’s end all that is needed is an internet browser to perform these experiments. As part of this programme, a virtual laboratory is being developed at the Centre of Studies in Resources Engineering (CSRE), Indian Institute of Technology Bombay, India for satellite image processing and analysis (v-SIPAL) that enables the student to perform the same kind of image processing experiments that are typically done in a satellite image analysis laboratory using commercial software
This is achieved by providing a set of sample images, and a set of pre-defined inputs for each experiment with which the student is expected to obtain identical outputs that are shown in the interpretation module
EVALUATION OF THE VIRUTAL LABORATORY. This system is currently deployed on a, Intel Xeon server with Windows 2003 server operating system, 8 GB RAM and a Redundant Array of Independent Disks (RAID) 5 configuration with 1.5 TB storage
Summary
In order to reduce the gap between these groups of institutions, Government of India launched two major programmes called Virtual Laboratories and Technology Enhanced Learning. Through these programmes students get access to videos of lectures delivered at the Indian Institutes of Technology and course materials as well as web-enabled virtual laboratories using which experiments are performed as if they are done in the laboratory itself. At the user’s end all that is needed is an internet browser to perform these experiments As part of this programme, a virtual laboratory is being developed at the Centre of Studies in Resources Engineering (CSRE), Indian Institute of Technology Bombay, India for satellite image processing and analysis (v-SIPAL) that enables the student to perform the same kind of image processing experiments that are typically done in a satellite image analysis laboratory using commercial software. The coming sections discuss the structure and modules in this virtual laboratory
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