Suggestion: Improve product functional value, upgrade product structure, and be cautious in large-scale expansion
Image Sensors World
News and discussions about image sensors
Monday, June 27, 2022
Reports argue that mobile phone camera market is slowing
Suggestion: Improve product functional value, upgrade product structure, and be cautious in large-scale expansion
Friday, June 24, 2022
Videos du jour - June 24, 2022
CASS Talks 2022 - Jose Lipovetzky, CNEA, Argentina - April 8, 2022. Viewing ionizing radiation with CMOS image sensors.
Distributed On-Sensor Compute System for AR/VR Devices: A Semi-Analytical Simulation Framework for Power Estimation (Jorge GOMEZ, Research Scientist, Reality Labs, Meta)
This video briefly introduces the Global Shutter product line of PixArt. It provides insights into the key competitiveness of PixArt's Global Shutter products by comparing their ultra-low-power consumption rates and advanced built-ins with other similar products in the market.
Thursday, June 23, 2022
Chronoptics compares depth sensing methods
In a blog post titled "Comparing Depth Cameras: iToF Versus Active Stereo" Refael Whyte of Chronoptics compares depth reconstructions from their indirect time-of-flight (iToF) "KEA" camera with active stereo using an Intel RealSense D435 sensor.
Depth data can also be overlaid on RGB to get colored point cloud visualizations. KEA provides much cleaner-looking results:
They show some limitations too. In this scene the floor has very low reflectivity in IR so the KEA camera struggles to collect enough photons there:
[PS: I wish all companies showed "failure cases" as part of their promotional materials!]
Full article here: https://medium.com/chronoptics-time-of-flight/comparing-depth-cameras-itof-versus-active-stereo-e163811f3ac8
Wednesday, June 22, 2022
BrainChip + Prophesee partnership
Tuesday, June 21, 2022
New image sensor in ARRI's latest Alexa 35 cine camera
ARRI has officially unveiled the ALEXA 35, a new Super 35 digital cinema camera with 17 stops of dynamic range and a host of new features that are all aimed to provide the best possible image quality.The ALEXA 35 has big shoes to fill as it is the first ARRI camera to feature a sensor that isn’t based on the ALEV-III. The ALEV-III has been used in various forms in every single ALEXA camera since 2010. The ALEXA 35 represents the next big step for ARRI in the evolution of the ALEXA family.
Monday, June 20, 2022
Recent Image Sensor Videos
Friday, June 17, 2022
PhD Thesis on Dynamic Range Improvements
A PhD thesis titled "Proposal of Architecture and Circuits for Dynamic Range Enhancement of Vision Systems on Chip designed in Deep Submicron Technologies" by from Universidad de Sevilla is now available to the public. The thesis is by Sonia Vargas Sierra who did this work at the Image Sensor group of Microelectronic Institute of Seville.
The work presented in this thesis proposes new techniques for dynamic range expansion in electronic image sensors. Since Dynamic Range (DR) is defined as the ratio between the maximum and the minimum measurable illuminations, the options for improvement seem obvious; first, to reduce the minimum measurable signal by diminishing the noise floor of the sensor, and second, to increase the maximum measurable light by increasing the sensor saturation limit.
In our case, we focus our studies to the possibility of providing DR enhancement functionality in a single chip, without requiring any external software/hardware support, composing what is called a Vision-System-on-Chip (VSoC). In order to do so, this thesis covers two approaches. Chronologically, our first option to improve the DR relied on reducing the noise by using a fabrication technology that is specially devoted to image sensor fabrication, a so-called CMOS Image Sensor (CIS) technology. However, measurements from a test chip indicated that the dynamic range improvement was not sufficient to our purposes (beyond the 100dB limit). Additionally, the technology had some important limitations on what kind of circuitry can be placed next to the photosensor in order to improve its performance. Our second approach has consisted in, first, designing a tone mapping algorithm for DR expansion whose computational needs can be easily mapped onto simple signal conditioning and processing circuitry around the photosensor, and second, designing a test chip implementing this algorithm in a standard CMOS technology.
This thesis is organized in five chapters. Chapter 1 describes the main concepts involved in image sensors focusing in High Dynamic Range (HDR) operation. Chapter 2 presents the study of an image sensor optimized technology in order to be considered for dynamic range improvement techniques. Chapter 3 describes an innovative tone mapping algorithm used to optimize the compression of HDR scenes. Chapter 4 introduces the image sensor chip that has been designed and fabricated, which implements the new tone mapping algorithm. Chapter 5 shows the experimental results and evaluation of the performance of the chip.
- S. Vargas-Sierra et al., "A 151 dB high dynamic range CMOS image sensor chip architecture with tone mapping compression embedded in-pixel", IEEE Sensors J. Jan. 2015. https://ieeexplore.ieee.org/document/6860247
- Mori et al., "A 4.0 μm Stacked Digital Pixel Sensor Operating in a Dual Quantization Mode for High Dynamic Range," IEEE TED June 2022 issue. https://ieeexplore.ieee.org/
abstract/document/9762367/
Thursday, June 16, 2022
Evolution of Image Sensor Architectures With Stacked Device Technologies (IEEE TED June 2022)
In a paper titled "Evolution of Image Sensor Architectures With Stacked Device Technologies" in IEEE TED (June 2022) Y. Oike writes:
The evolution of CMOS image sensors and their prospects using advanced imaging technologies are promising candidates to improve the quality of life. With the rapid advent of parallel analog-to-digital converters (ADCs) and back-illuminated (BI) technology, CMOS image sensors currently dominate the market for digital cameras, and stacked CMOS image sensors continue to provide enhanced functionality and user experience in mobile devices. This article reviews the latest achievements in stacked image sensors with respect to the evolution of image sensor architecture for accelerating performance improvements, extending sensing capabilities, and integrating edge computing with various stacked device technologies.
Wednesday, June 15, 2022
AlpsenTek vision sensor startup raises nearly $30 million
Chinese vision sensor startup AlpsenTek raised nearly $30 million in Series A funding
AlpsenTek(锐思智芯), a Chinese machine vision sensor startup, announced on June 6 that it raised nearly RMB200 million($30 million) in Series A funding earlier this year.
The investment was was jointly led by Xunxing Investment - an investment company of Chinese smartphone brand OPPO and Cowin Capital.
AlpsenTek’s original investors ArcSoft Corp, Sunny Optical Industry Fund, Clory Ventures, Shenzhen Angel FOF, Lenovo Capital and Incubator Group, and Zero2IPO Group also participated in this round of funding.
Founded in 2019, AlpsenTek is a company engaged in the research and development of machine vision sensors and algorithms. The company is headquartered in Beijing and has offices in Shenzhen, Nanjing, and Switzerland.
AlpsenTek employs an international team of professionals from elite research firms worldwide with extensive expertise in developing algorithms, software, hardware, and chips, according to the company.
The core products of AlpsenTek are the ALPIX series hybrid biomimetic vision chips and integrated machine vision solutions. The company said that it holds a complete core set of intellectual property rights and in-house development capabilities to fill technology gaps in machine vision. The company also has begun to cooperate with leading players in the industry. Its products can be widely used in robots, smartphones, unmanned driving, drones, security, and other fields, with a potential market size of over RMB1 trillion ($150 billion).
Original article: https://jw.ijiwei.com/n/821276
Tuesday, June 14, 2022
Smartphone imaging trends webinar and whitepaper
From Counterpoint Research (https://www.youtube.com/watch?
Over the last few years, steady upgrades in CMOS image sensor (CIS) technology combined with the evolution of chipsets – and the improvements in AI they enable – are bringing step-change improvements to smartphone camera performance.
Counterpoint Research would like to invite you to join our latest webinar Smartphone Imaging Trends: New Directions Capturing Magic Moments which will be attended by key executives from HONOR, Qualcomm, and DXOMARK as well as a renowned professional photographer and director Eugenio Recuenco.
The webinar is a complement to an upcoming Counterpoint Whitepaper (also to be released on June 8) which will cover smartphone imaging trends, OEM strategy comparisons, the key components of a great camera and show how technology is helping to unlock creative expression.
The camera has always been a major component of the smartphone and a key selling point among consumers. In the past, smartphone cameras lagged far behind even the most basic DSLRs as form factor and size constraints impacted picture and video quality. But technology has now advanced to the point where today’s top flagship devices are capable of delivering DSLR-like performance.The rise of AI algorithms, advancements in multi-frame/multi-lens computational photography, more powerful processors, the addition of dedicated image signal and neural processing units and, of course, the compounding of R&D experience has resulted in today’s smartphone cameras rivalling dedicated imaging devices.In fact, the smartphone’s comparatively compact form factor is an advantage, as clicking pictures and recording videos are becoming integrated into our daily lives through the growth of social media. The role of the camera has shifted to become a life tool, as end-users migrate from being simply consumers of content to creators.This new direction that imaging has taken warrants further advancements in smartphone cameras, as we lean on technology to make the experience easier while allowing all of us to be more creative.
Table of Contents:IntroductionSmartphone Imaging TrendsMegapixels: More is not necessarily betterMulti-camera modules: Covering all scenariosImage processing: Pushing the laws of physicsOEM Imaging ComparisonsAs hardware slows, innovation growsWhere the magic happensNew magic, new directionsMeasuring QualityComponents of an exceptional smartphone cameraImage processing innovationDXOMARK ReadoutCapturing Magic MomentsPowering art through technologyConclusion
Monday, June 13, 2022
Lucid Vision Labs discusses EMVA 1288 specs for Sony IMX492
Lucid Vision Labs has released a new video overview of Sony's rolling shutter 47MP IMX492 sensor.
The video discusses quantum efficiency (time stamp 2:02), saturation capacity (3:04), temporal dark noise (3:15), and dynamic range (3:27). It also compares it to some of other higher resolution sensors (31.4MP IMX342, 24.5MP IMX530, 20MP IMX183)