Real-time non-uniformity correction system and method for large-scale infrared focal plane

Abstract

The invention relates to a real-time non-uniformity correction system and method for a large-scale infrared focal plane. The correction system comprises a large-capacity non-volatile memory, a parameter memory SRAM and a logic time sequence control circuit; the logic time sequence control circuit comprises a main control module as well as a non-volatile memory read / write control module, an SRAM read / write control module, a parameter up-pouring module and a correction operation module which are connected with the main control module; the correction system further comprises an image data input interface and an image data output interface which are connected with the correction operation module; the large-capacity non-volatile memory is connected with the parameter memory SRAM and the non-volatile memory read / write control module; and the parameter memory SRAM is also connected with the SRAM read / write control module and the correction operation module. Compared with the prior art, the system and method of the invention can effectively ensure correction speed while ensuring operation precision and have the advantages of large parameter storage capacity, high operation real-time performance and the like, and can be applied to the real-time correction of large-scale area array detectors.

Description

technical field [0001] The invention relates to the technical field of infrared imaging, in particular to a large-scale infrared focal plane real-time non-uniformity correction system and method thereof. Background technique [0002] Infrared detectors are the core of infrared detection systems. With the development of current detection technology, infrared imaging detection systems, especially infrared hyperspectral imaging detection systems, increasingly need to use large-scale infrared focal plane detectors. However, due to many Due to control factors and technological level limitations, the responsivity and DC bias of each photosensitive element of the infrared focal plane detector cannot be completely consistent. This non-uniformity of response and bias will make the imaging system Inconsistencies in the output at different degrees, manifested as spots or stripes with uneven brightness and darkness on the image, that is, nonuniformity of the image (Nonuniformity), also ...

AI Technical Summary

Problems solved by technology

However, since the DSP has only one set of address and data buses, and the non-uniform correction involves the reading of two sets of correction coefficients and image data, the DSP is required to multiplex its address bus, which is connected to the memory storing the correction coefficients and original image data, and then time-sharing Correction coefficients and image data alone require a higher operating frequency of the DSP to reach up to Ghz, which is difficult to achieve in practical applications

Images