An Improved Electronic Image Motion Compensation (IMC) Method of Aerial Full-Frame-Type Area Array CCD Camera Based...

Area of Science:

• Optoelectronics
• Image Processing

Background:

• Conventional electronic image motion compensation (IMC) in time delay integration (TDI) mode using charge-coupled devices (CCDs) suffers from image degradation.
• The non-synchronous charge packet transfer during line-by-line exposure causes unsatisfactory compensation.

Purpose of the Study:

• To propose and analyze an improved electronic IMC method for CCDs.
• To enhance image compensation performance by minimizing charge packet transfer non-synchronicity.

Main Methods:

• Analysis using the optical injection formula for charge-coupled devices (CCDs).
• Development of an improved electronic IMC method utilizing a CCD multiphase structure with electrode-by-electrode charge packet driving during exposure.
• Design of a driver timing diagram and hardware implementation using a dual pulse pattern generator system.

Main Results:

• The improved method significantly reduces the mismatch between charge packet transfer velocity and image motion.
• The average modulation degree of the improved method is 47/96, compared to 1/3 for the conventional method.
• Computer simulations and indoor verification confirm superior compensation effects.

Conclusions:

• The improved electronic IMC method based on CCD multiphase structure offers enhanced image motion compensation.
• The proposed hardware implementation effectively achieves the improved IMC, outperforming conventional approaches.