Passive radiometric imaging device and corresponding method

A passive radiometric imaging method for scanning a scene, said method comprising:

• detecting radiation emitted in a predetermined spectral range from a spot of said scene, and generating radiation signals based on the detected radiation,
• moving the spot, at which the radiation is detected, to various positions of said scene,
• controlling the movement of the spot so that the spot moves from one position to another position of the various positions after a random time interval, and
• processing the detected radiation signals to reconstruct an image of said scene using compressive sensing.

A passive radiometric imaging system for scanning a scene, said system comprising:

• radiation detection circuitry that detects radiation emitted in a predetermined spectral range from a spot of said scene, and that generates radiation signals based on the detected radiation,
• spot movement circuitry that effects movement of the spot, at which the radiation is detected, to various positions of said scene,
• control circuitry that controls said spot movement circuitry to effect the movement of the spot from one position to another position of the various positions after a random time interval, and
• processing circuitry that processes the detected radiation signals to reconstruct an image of said scene using compressive sensing.