Processing method for coded aperture sensor
First Claim
1. A method of locating/detecting a target in a scene comprising the steps of taking data acquired from a detector array arranged to receive radiation from the scene via a coded aperture array, and determining a likelihood for the position of a target assumed to be located in the scene using the acquired data and a statistical scene model, wherein the scene model comprises a set of possible states and a function that determines a probability that the particular signal would be obtained conditional upon the particular state.
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Abstract
A method of processing for a coded aperture imaging apparatus which is useful for target identification and tracking. The method uses a statistical scene model and, preferably using several frames of data, determines a likelihood of the position and/or velocity of one or more targets assumed to be in the scene. The method preferably applies a recursive Bayesian filter or Bayesian batch filter to determine a probability distribution of likely state parameters. The method acts upon the acquired data directly without requiring any processing to form an image.
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15 Claims
- 1. A method of locating/detecting a target in a scene comprising the steps of taking data acquired from a detector array arranged to receive radiation from the scene via a coded aperture array, and determining a likelihood for the position of a target assumed to be located in the scene using the acquired data and a statistical scene model, wherein the scene model comprises a set of possible states and a function that determines a probability that the particular signal would be obtained conditional upon the particular state.
- 14. A method of inferring scene attributes comprising the step of taking data acquired from a detector array arranged to receive radiation from the scene via a coded aperture array and performing Bayesian inference on said data directly to infer said attributes, wherein the attributes to be inferred comprise one or more of parameters describing one or more targets in the scene, motion of the scene, the scene background, parameters of other entities in the scene or aspects of the scene.
Specification