Tata Consultancy Services Limited

Parama Pal

Beena Rai

Avik Ghose

Murali Poduval

Deepak Shyamsunder Jain

Rinu Chacko

Earu Banoth

Prajith Pillai

Renju Parappillil Baby

This disclosure relates to portable speckle imaging system and method for automated speckle activity map based dynamic speckle analysis. The embodiments of present disclosure herein address unresolved problem of capturing variations in speckle patterns where noise is completely removed and dependency on intensity of variations in speckle patterns is eliminated. The method of the present disclosure provides a correlation methodology for analyzing laser speckle images for applications such as seed viability, fungus detection, surface roughness analysis, and/or the like by capturing temporal variation from frame to frame and ignoring the intensity of speckle data after denoising, thereby providing an effective mechanism to study speckle time series data. The system and method of the present disclosure performs well in terms of time efficiency and visual cues and requires minimal human intervention.

Portable speckle imaging system and method for automated speckle activity map based dynamic speckle analysis

This disclosure relates generally to speckle image analysis, and, more particularly, to a system and method for imaging of localized and heterogenous dynamics using laser speckle. Existing speckle analysis techniques do not offer the capability to achieve both the dynamic phenomenon which carries over a specific time duration and localizing the extent of the activity at a single, chosen instant of time simultaneously. The present disclosure records an image stack consisting of N speckle images sequentially over a period, divides the image stack into a spatial window and a temporal window, converts the speckle intensity data comprised in the spatial window into a column vector. Construct a diagonal matrix and extract a singular value from the diagonal matrix, then defines a speckle intensity correlation metric using the plurality of singular values, defines a speckle activity and generates a speckle contrast image by graphically plotting the speckle activity values.

System and method for imaging of localized and heterogeneous dynamics using laser speckle

This disclosure relates generally to a sensor based wearable fabric design for identifying distortion in movements and quantifying range of motion. Accurate quantification of multi-axial range of motion involved in complex movements of human body parts is challenging. The disclosure discloses a system and method providing a wearable fabric comprising a plurality of honey-comb structure with a plurality of adjacently placed hexagon structures. An optical sensor unit is placed on each side of each hexagon structure comprised in the plurality of honey-comb structures. A deformation of the plurality of sides of hexagon structure is determined to generate signatures of movement patterns of one or more body parts of a subject. Further, a comparison of generated signatures with stored signatures of the movement patterns is performed to determine an error indicative of a distortion in the movement patterns. The system and method accurately quantify range of motion with increased measurement accuracy.

Sensor based wearable fabric design for identifying distortion in movements and quantifying range of motion

Artificially structured materials are created artificially and offer customizable properties. They are being used in various fields. A system and method for designing artificially structured materials have been provided. The system and method is based on neural networks for approximating the electromagnetic (EM) responses of the artificially structured materials. By treating the EM spectral data as time-varying sequences and the inverse problem as a single-input, multi-output model, the architecture is forced to learn the geometry of the designs from the training data as opposed to abstract features thereby addressing both the forward and the inverse design problems. The system is configured to provide end-to-end workflow from collating the requirement specifications from the user (based on the intended use case such as solar energy harvesting, biological sensing, thermos-photovoltaics, photo-detection, creation of imaging devices, absorption filtering and stealth technology) to generating a device design for the intended functionality.

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Bengaluru, India

Parama Pal