Avigilon Corporation

Guoqian Sun

Sina Afrooze

Colin Paul Janssen

Michael Neufeld

Piotr Zbigniew Celler

Jeremy Hale

Frederick Ramsay

Colin Janssen

A method for generating an infrared (IR) beam for illuminating a scene to be imaged comprises providing at least two IR emitters, including a first IR emitter operable to emit a wide beam component of the IR beam, and a second IR emitter operable to emit a narrow beam component of the IR beam, wherein the wide beam component has a linear profile that has a lower standard deviation than a linear profile of the narrow beam component. The method also comprises selecting a desired linear profile for the IR beam, and selecting a power ratio of power directed to the first IR emitter and power directed to the second IR emitter that produces the IR beam with the desired linear profile when the narrow beam component and wide beam component are combined.

Method and apparatus for generating an infrared illumination beam with a variable illumination pattern

A method adjusts an auto exposure target in an auto-exposure operation on a sequence of images, such as a sequence of infrared images. The method comprises: obtaining a histogram of at least one of the images; applying a weighted histogram table to the histogram to obtain weighted histogram bins wherein at least some bins in the histogram containing saturated pixels are assigned a higher weighting value and at least some bins in the histogram containing unsaturated pixels are assigned a lower weighting value, and summing the weighted histogram bins to obtain a saturation score and decreasing an auto exposure target for an auto exposure operation when the saturation score exceeds a first threshold value, and increasing the auto-exposure target when the saturation score is below the first threshold value and the image is underexposed.

Imaging apparatus with scene adaptive auto exposure compensation

A method for generating an infrared (IR) beam for illuminating a scene to be imaged comprises providing at least two IR emitters, including a first IR emitter operable to emit a wide beam component of the IR beam, and a second IR emitter operable to emit a narrow beam component of the IR beam, wherein the wide beam component has a linear profile that has a lower standard deviation than a linear profile of the narrow beam component. The method also comprises selecting a desired linear profile for the IR beam, and selecting a power ratio of power directed to the first IR emitter and power directed to the second IR emitter that produces the IR beam with the desired linear profile when the narrow beam component and wide beam component are combined; and directing power to the first and second IR emitters at the selected power ratio to generate the wide and narrow beam components, and combining the generated wide and narrow beam components to produce the IR beam.

Growing community of inventors

Vancouver, Canada

Guoqian Sun