A pixel-parallel image sensor readout technique is demonstrated for CMOS active pixel sensors to facilitate a range of applications where the high-speed detection of the presence of an object, such as a laser spot, is required. Information concerning the object’s location and size is more relevant that a captured image for such applications. A sensor for which the output comprises the numbers of pixels above a global threshold in both rows and columns is demonstrated in 0.18 μm CMOS technology. The factors limiting the ultimate performance of such a system are discussed. Subsequently, techniques for enhancing information retrieval from the sensor are introduced,including centroid calculations using multiple thresholds, multi-axis readout, and run-length encoding.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.