Circular scanning technique for large area imaging

A system for generating an image of a region of interest (ROI) of a target object, the system comprising:

• a camera;
• a target stage configured to receive the target object, the target stage configured to provide a translational movement and a rotational movement of the target object;
• and
• a controller configured to:
• control the camera and target stage to iteratively shift the target along scan trajectories of sample locations to capture images of each of a plurality of concentric rings and sub-rings of a predefined radial pitch over the ROI, the sample locations represented by polar coordinates defining sectors of each of the sub-rings;
• extract super resolution (SR) pixels from the images to reconstruct an SR image of each of the rings in the polar coordinates;
• and
• project the SR images into Cartesian coordinate images.

A method of generating an image of a region of interest (ROI) of a target object by an imaging system, the method comprising:

• determining a plurality of concentric circular rings over the ROI, each of the plurality of concentric rings having a radius incremented by a pitch value from an innermost concentric ring having a minimum radius to an outermost concentric ring having a maximum radius;
• uniformly dividing each ring into sub-rings, each sub-ring having a predefined pitch, and dividing the rings and sub-rings into sectors of predefined angular shifts;
• correlating the sectors with polar coordinates;
• determining scan trajectories with a plurality of sampling positions for an imaging system, the imaging system having a camera pixel array correlated to the polar coordinates to within a predetermined offset;
• iteratively shifting the target along the scan trajectories and capturing images at the sampling positions;
• interpolating polar coordinates from the captured images to form images of each ring;
• extracting super resolution (SR) pixels from the polar coordinate ring images to reconstruct an SR image of each of the rings in the polar coordinates;
• and
• projecting the SR images into Cartesian coordinate images.