Abstract
Based on bionic compound eye and human foveated imaging mechanisms, a hybrid bionic image sensor (HBIS) is proposed in this paper to extend the field of view (FOV) with high resolution. First, the hybrid bionic imaging model was developed and the structure parameters of the HBIS were deduced. Second, the properties of the HBIS were simulated, including FOV extension, super-resolution imaging, foveal ratio and so on. Third, a prototype of the HBIS was developed to validate the theory. Imaging experiments were carried out, and the results are in accordance with the simulations, proving the potential of the HBIS for large FOV and high-resolution imaging with low cost.
Highlights
Compound eyes and human eyes have been studied in regard to their remarkable properties for optical imaging [1,2,3,4,5]
Compound eye provides a large field of view (FOV), infinite depth of field (DOF), low aberrations and motion acuity, which can be used in many applications, such as high speed motion detection, large FOV surveillance and machine vision [6,7,8,9]
FOV extension ratio (FER) is viewed as the key indicator of hybrid bionic image sensor (HBIS), because we aim to demonstrate the capability of extending the FOV from one single aperture
Summary
Compound eyes and human eyes have been studied in regard to their remarkable properties for optical imaging [1,2,3,4,5]. PACE [10,11,12] are mainly designed for super-resolution imaging, which use the sub-pixel shifts among the ommatidia to resample the scene with a relatively high spatial sampling frequency. CACE [1,3,13] are mainly designed for FOV extension. Compared with PACE, the overlaps between FOVs of adjacent ommatidia of CACE are usually small enough to extend to the whole FOV while avoiding a blind zone
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