HDigital? is an advanced image processing software for numerical reconstruction and processing of digitally sampled holograms (DSH). This software generates double exposure holographic interferograms and does numerical shearing to generate shearograms.

Features

• Numerical reconstruction using Fresnel transform method
• Process bitmap images
• Generate phase map, intensity map, interferograms and interference phase map
• Phase unwrapping, phase plot
• Low pass filter, medium pass filter and high pass filter
• Zoom, intensity plot, histogram plot, equalisation, intensity multiplication, image addition, subtraction, contrast variation, interference phase, calculate hologram construction parameters, image cropping, etc
• Numerical shearing and shearograms
• Automatic generation of interferograms from a set of DSH
• Automatic storage of interferograms

HDigital Output

• DSH Hologram Interferogram
• Shearing Shearogram
• Applications: Research on digital holography (DH); DH data storage; DH interferometry for NDT; DH contour generation; DH deformation measurement; and DH shape measurement.
• Stand-alone package
• Multi windows
• Toolbar menus
• Dialog boxes
• Windows platform

HDigitalRT

• Real time digital holography version of Hdigital
• Records and reconstruct holograms in real time
• Process 8, 10, 12 and 16 bit images
• Generates interferograms and shearograms simultaneously
• Save interferograms in video/bitmap format
• Retrieval and analysis are very fast
• LabVIEW environment in Windows platform
• Access IEEE camera, and
• Control of camera/video parameters

(Contact: Head, TT & IC, ISRO PO, Thiruvananthapuram, Kerala 695 022, Tel: 0471-2562222. Fax: 91-471-2562222. Email: ttic@vssc.gov.in)