A Review on Digital Pixel Sensors
Md Rahatul Islam Udoy, Shamiul Alam, Md Mazharul Islam, Akhilesh, Jaiswal, Ahmedullah Aziz

TL;DR
This review comprehensively discusses digital pixel sensors, highlighting their advantages, challenges related to pixel pitch, and potential solutions like compact circuits and 3D integration, to advance imaging technology.
Contribution
It provides a detailed categorization, analysis, and comparison of DPS architectures, emphasizing design strategies to overcome pixel pitch limitations.
Findings
DPS offers high speed and image quality compared to analog sensors.
Pixel pitch increase due to ADC integration limits high-density applications.
Strategies like compact circuits and 3D integration can mitigate pixel size issues.
Abstract
Digital pixel sensor (DPS) has evolved as a pivotal component in modern imaging systems and has the potential to revolutionize various fields such as medical imaging, astronomy, surveillance, IoT devices, etc. Compared to analog pixel sensors, the DPS offers high speed and good image quality. However, the introduced intrinsic complexity within each pixel, primarily attributed to the accommodation of the ADC circuit, engenders a substantial increase in the pixel pitch. Unfortunately, such a pronounced escalation in pixel pitch drastically undermines the feasibility of achieving high-density integration, which is an obstacle that significantly narrows down the field of potential applications. Nonetheless, designing compact conversion circuits along with strategic integration of 3D architectural paradigms can be a potential remedy to the prevailing situation. This review article presents a…
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Taxonomy
TopicsCCD and CMOS Imaging Sensors
MethodsSPEED: Separable Pyramidal Pooling EncodEr-Decoder for Real-Time Monocular Depth Estimation on Low-Resource Settings
