Proceedings of the 12th annual ACM symposium on User interface software and technology
CyberCode: designing augmented reality environments with visual tags
DARE '00 Proceedings of DARE 2000 on Designing augmented reality environments
An Algorithm for Data-Driven Bandwidth Selection
IEEE Transactions on Pattern Analysis and Machine Intelligence
Vision-Based Multi-Robot Simultaneous Localization and Mapping
CRV '04 Proceedings of the 1st Canadian Conference on Computer and Robot Vision
Single-Chip Eye Tracker Using Smart CMOS Image Sensor Pixels
Analog Integrated Circuits and Signal Processing
A CMOS image processing sensor for the detection of image features
Analog Integrated Circuits and Signal Processing
A new CMOS multimode digital pixel sensor dedicated to an implantable visual cortical stimulator
Analog Integrated Circuits and Signal Processing
Asynchronous demodulation technique for use in vision sensor image classification and segmentation
International Journal of Circuit Theory and Applications
Variational learning for Gaussian mixture models
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
An analog motion field detection chip for image segmentation
IEEE Transactions on Circuits and Systems for Video Technology
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Detection of modulated light signals transmitted by active image markers can be used in object localization tasks and machine vision applications. The asynchronous demodulation pixel is able to detect the signal transmitted by these modulated markers. The modulated marker position in a two-dimensional pixel array can be used to identify the marker location in the field. In this paper the asynchronous demodulation pixel is analyzed and its operation is investigated in the presence of non-ideal effects such as parasitic elements, device mismatches and process variations. The effect of demodulator bias conditions and different switch pulsing techniques are examined and a modified demodulator controlling method is presented to increase the dynamic range and sensitivity of the pixel compared with the common operation schemes. The different demodulator structures are also simulated as 64 脳 64 pixel array sensors using a 0.18 μm standard CMOS process and their operation is compared regarding sensitivity, filter transfer function, pixel size and power consumption.