Abstract: Disclosed is a handheld laser-based perfusion imaging apparatus having a light source and an imaging device which are arranged in a fixed orientation to each other in the apparatus. The light source is configured for projecting a beam of coherent light onto a measurement field at a predetermined distance spaced apart from the apparatus. The imaging device is configured for recording speckle intensity maps of the measurement field and/or images of Doppler shifted light of the measurement field. The light source is configured to provide a substantially spherical wavefront or a substantial planar wavefront, at least at the measurement field. Preferably, the apparatus with the light source that provides a substantial planar wavefront, including a gimbal mount. Also disclosed is a method for measuring a perfusion in a tissue using the handheld laser-based perfusion imaging apparatus as described above.

Abstract: A method and system of indoor positioning associated with a smartphone includes installing one or more color LED identifiers on a ceiling associated with an indoor location and dividing the indoor location based on the one or more color LED identifiers into one or more cells. One or more images of the one or more color LED identifiers are captured through a camera associated with the smartphone. Further, accelerometer data associated with the smartphone is captured onto a memory associated with the smartphone. The accelerometer data and captured images are transmitted over a computer network to a computer processor and one or more of a location (two dimensional and/or three dimensional) in one or more cells, azimuth and tilt associated with the smartphone are calculated through closed form equations. The location of the smartphone is determined within the cell based on an identified cell of the one or more cells.

Abstract: A method and system of indoor positioning associated with a smartphone includes installing one or more color LED identifiers on a ceiling associated with an indoor location and dividing the indoor location based on the one or more color LED identifiers into one or more cells. One or more images of the one or more color LED identifiers are captured through a camera associated with the smartphone. Further, accelerometer data associated with the smartphone is captured onto a memory associated with the smartphone. The accelerometer data and captured images are transmitted over a computer network to a computer processor and one or more of a location (two dimensional and/or three dimensional) in one or more cells, azimuth and tilt associated with the smartphone are calculated through closed form equations. The location of the smartphone is determined within the cell based on an identified cell of the one or more cells.