An Event-based Vision Sensor (EVS) realizes high-speed, low latency data output by detecting luminance changes, which each pixel senses asynchronously, and only outputting the differential data after combining with the coordinate and time information. This functionality can be leveraged in recognition processing systems to enhance the efficiency of data provision, ideal for various applications in the industrial field such as detection of fast-moving objects, equipment monitoring, movement detection analysis, and image recognition.
Compact with high resolution, high-speed, and high temporal resolution
The industry’s smallest*1 pixel size of 4.86 μm can read out event data efficiently at high temporal resolution.
Sony Semiconductor Solutions Corporation’s original miniaturization technology based on the structure of stacked CMOS image sensor together with Cu-Cu connection makes it possible to realize the industry’s smallest pixel with a large fill factor. This technology has produced a small Event-based Vision Sensor with high image resolution, high speed, and high temporal resolution (an image sensor that continuously detects movements and luminance changes).
*1) Among stacked event-based vision sensors. According to Sony research (as of announcement on September 9, 2021).
Capable of high-speed output at low power consumption
Sony's original stacked structure realizes event-based technology that outputs data only based on the pixel luminance changes detected by all pixels asynchronously and combined with coordinate and time information. Handling only the required data this method can achieve fast output, in the order of microseconds, while keeping power consumption low. It operates much faster than the conventional frame-based method.
Filter function to remove unnecessary event data with high accuracy
In order to cater to various applications the sensor is equipped with several filter functions specifically designed for event data. They can be employed to remove unnecessary event data such as periodical events due to LEDs flickering and other events that are highly unlikely to be the outline of a moving object, etc.
|Model name||Image size||Effective pixels|
|IMX636||1/2.5-type||Approx. 0.92 megapixels|
|IMX637||1/4.5-type||Approx. 0.32 megapixels|
Approx. 0.92 megapixels
Approx. 0.32 megapixels
|Unit cell size||4.86μmx4.86μm|
|Image size||Diagonal 7.137mm（1/2.5-type）||Diagonal 3.983mm（1/4.5-type）|
|Color filter||Black and white|
|Package||Ceramic LGA Package(Exterior: 13 x 13 mm)|
|Nominal contrast threshold (ln)||25%|
|Latency||ROI*2||Less than 100 microseconds @ 1 Klux
Less than 1000 microseconds @ 5 lux
|Thinned read-out*3||Less than 220 microseconds @ 1 Klux
Less than 1000 microseconds @ 5 lux
|Maximum event rate||1.06 Geps(giga events per second)|
|Dynamic range||86 dB or more (5-100,000 lux) *4|
|Interface||Input: I2C (400 kHz / 1 Mhz), 4-wire SPI
Output: MIPI D-PHY(1.5 Gbps/lane)2lane, SLVS(800 Mbps/lane) 4lane
|Event signal processing function||Anti-flicker/ Event filter/ Event rate control|
*2) ROI 9x9=81pixels
*3) Thinned read-out, 1/5 (horizontal direction).
*4) 5 lux is the minimum light condition that guarantees imaging characteristics. Low-Light Cutoff(not guaranteed) is 0.08 lux with 50% of pixels respond to linear 100% contrast.
These two sensors were made possible through a collaboration between Sony and Prophesee, by combining Sony's CMOS image sensor technology with Prophesee's event-based method vision sensing technology.
As part of the collaboration between Sony and Prophesee on these products, Metavision® Intelligence Suite an event signal processing software optimized for sensor performance, is available from Prophesee. Combining Sony’s event-based vision sensors with this software will enable efficient application development and provide solutions for various use cases.
*) Metavision® is a registered trademark of PROPHESEE S.A.
A list of cameras with Event-based Vision Sensor (EVS)
Download a list of cameras that incorporate Sony's Event-based Vision Sensor
Find out more about Event-based Vision Sensor (EVS).
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