Sep 12 – 17, 2021
University of Birmingham
Europe/London timezone

A Novel Ultra-High-Speed CMOS Image Sensor Implementation with Variable Spatial and Temporal Resolution using Temporal Pixel Multiplexing

Sep 16, 2021, 12:20 PM
15m
in-person

in-person

Speaker

Deividas Krukauskas (Science and Technology Facilities Council)

Description

Temporal Pixel Multiplexing (TPM) is a new imaging modality allowing one CMOS image sensor to do the job of both high-resolution still photography and high-speed video with equal ease. Based on the desired trade-off between the number of frames in a high-speed burst and the video resolution, the sensor splits the pixel array into multi-pixel sub-groups defined prior to image capture. The current TPM design provides a high degree of flexibility in setting the size of these sub-groups, e.g., 2x2, 3x3, etc., and evenly distributes the resulting pixel groups across the entire array. When acquiring a single image frame, all pixels are exposed with the same integration time using a global shutter operation. Data is then readout as in a standard CMOS image sensor. When high-speed video is to be acquired, each pixel in a sub-group is exposed with a different integration time. These times have the same length, but can be offset from each other, resulting in each pixel acquiring a different frame of the high-speed video. The sensor presented here can offset these times by as little as 100ns. Therefore, for example, a 9x9 sub-group can acquire 81 frames of 10Mfps video footage. The resulting output is a single high-resolution image that can be post-processed into a short movie, formed from an ultra-high-speed sequence of lower resolution frames, consisting of pixels which have been exposed at the same time and collected together. This demonstrates the key benefit of the TPM technique - the capability to retrieve both a high-resolution image and a high-speed image sequence from a single picture with no added readout noise.

We present the first silicon implementation of a CMOS sensor employing the TPM imaging technique. The presentation covers the TPM sensor architecture, performance and functionality test results, and application benefits of the TPM method.

Title Mr
Nationality Lithuanian
Your name Deividas Krukauskas
email deividas.krukauskas@stfc.ac.uk
Institute UKRI-STFC

Primary author

Deividas Krukauskas (Science and Technology Facilities Council)

Co-authors

Presentation materials