2011
DOI: 10.1109/tbcas.2010.2075929
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Pulse-Modulation Imaging—Review and Performance Analysis

Abstract: In time-domain or pulse-modulation (PM) imaging, the incident light intensity is not encoded in amounts of charge, voltage, or current as it is in conventional image sensors. Instead, the image data are represented by the timing of pulses or pulse edges. This method of visual information encoding optimizes the phototransduction individually for each pixel by abstaining from imposing a fixed integration time for the entire array. Exceptionally high dynamic range (DR) and improved signal-to-noise ratio (SNR) are… Show more

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Cited by 63 publications
(32 citation statements)
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“…6 shows the architecture of the chip. Its core is a QCIF (176×144) resolution array of pixels, which are digital pixel sensors (DPS) with Pulse Width Modulation (PWM) [36], including a 2-pixel wide peripheral ring of dummy pixels. The functionality of the chip is supported by several blocks, which are responsible for biasing, generation of analog and digital references, digital control, and high-speed image I/O.…”
Section: Chip Architecture and Pixelsmentioning
confidence: 99%
“…6 shows the architecture of the chip. Its core is a QCIF (176×144) resolution array of pixels, which are digital pixel sensors (DPS) with Pulse Width Modulation (PWM) [36], including a 2-pixel wide peripheral ring of dummy pixels. The functionality of the chip is supported by several blocks, which are responsible for biasing, generation of analog and digital references, digital control, and high-speed image I/O.…”
Section: Chip Architecture and Pixelsmentioning
confidence: 99%
“…By changing its program, we can switch between PWM and PFM. Each of these two modulation schemes has its own strengths and weaknesses that are detailed in [2]. Notably, PFN architectures have the property to average out the noise, leading to a better SNR.…”
Section: Complete Systemmentioning
confidence: 99%
“…In this context, Pulse Modulation (PM) imaging appears as an interesting alternative [2]. By representing the image data in the time domain, PM takes advantage of the faster operation and steeper rail-to-rail transitions that characterize deep submicron technologies, leading to a higher resolution in the time domain.…”
Section: Introductionmentioning
confidence: 99%
“…But in order to ensure enough signal swing, the supply voltage (Vdd) of these analog pixels cannot be scaled too much [9]. Recently, various approaches concerning the use of the pulse-width-modulation (PWM) technique have been investigated [11]. In PWM imaging, the incident light intensity is represented by the width of the pixel output pulse in digital level instead of analog voltages or currents.…”
Section: Introductionmentioning
confidence: 99%