Visual Industry Guide
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The Sigma 105mm f2.8 DG DN Macro Art is the first macro lens in Sigma’s DN-series, designed for mirrorless cameras with Sony E or Leica L-mounts. Check out my complete review to find out how the all-new optical design measures-up!…
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ST publishes another presentation of its ToF sensors lineup and roadmap:
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MDPI paper "An Acquisition Method for Visible and Near Infrared Images from Single CMYG Color Filter Array-Based Sensor" by Younghyeon Park and Byeungwoo Jeon from Sungkyunkwan University, Korea, proposes color processing pipeline that converts CMYG image into RGB and IR:
"To acquire the NIR image together with visible range signals, an imaging device should be able to simultaneously capture NIR and visible range images. An implementation of such a system having separate sensors for NIR and visible light has practical shortcomings due to its size and hardware cost. To overcome this, a single sensor-based acquisition method is investigated in this paper. The proposed imaging system is equipped with a conventional color filter array of cyan, magenta, yellow, and green, and achieves signal separation by applying a proposed separation matrix which is derived by mathematical modeling of the signal acquisition structure.
The elements of the separation matrix are calculated through color space conversion and experimental data. Subsequently, an additional denoising process is implemented to enhance the quality of the separated images. Experimental results show that the proposed method successfully separates the acquired mixed image of visible and near-infrared signals into individual red, green, and blue (RGB) and NIR images. The separation performance of the proposed method is compared to that of related work in terms of the average peak-signal-to-noise-ratio (PSNR) and color distance. The proposed method attains average PSNR value of 37.04 and 33.29 dB, respectively for the separated RGB and NIR images, which is respectively 6.72 and 2.55 dB higher than the work used for comparison."
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BusinessWire: OmniVision announces the OH02A1S said to be the world’s first RGB-IR medical image sensor, which provides simultaneous white-light RGB captures and infrared monochrome captures in a single CMOS sensor.Image Sensors World Go to the original article...
Stanley Chan from Purdue University publishes a presentation of his ECCV 2020 paper "Dynamic Low-light Imaging with Quanta Image Sensors" by Yiheng Chi, Abhiram Gnanasambandam, Vladlen Koltun, and Stanley H. Chan:
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Samsung Strategy & Innovation Center publishes "Event-based Vision Algorithms" lecture by Kostas Daniilidis from Penn University:
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OSA Optics Express publishes "Single-pixel imaging 12 years on: a review" by Graham M. Gibson, Steven D. Johnson, and Miles J. Padgett from Glasgow University, UK.
"Modern cameras typically use an array of millions of detector pixels to capture images. By contrast, single-pixel cameras use a sequence of mask patterns to filter the scene along with the corresponding measurements of the transmitted intensity which is recorded using a single-pixel detector. This review considers the development of single-pixel cameras from the seminal work of Duarte et al. up to the present state of the art. We cover the variety of hardware configurations, design of mask patterns and the associated reconstruction algorithms, many of which relate to the field of compressed sensing and, more recently, machine learning. Overall, single-pixel cameras lend themselves to imaging at non-visible wavelengths and with precise timing or depth resolution. We discuss the suitability of single-pixel cameras for different application areas, including infrared imaging and 3D situation awareness for autonomous vehicles."
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Espros publishes an interview given by its CEO Beat De Coi at AutoSens:Image Sensors World Go to the original article...
PRNewswire: Maxim introduces MAX25205 hand-gesture controls sensor claimed to be the industry's lowest cost and smallest size. Featuring integrated optics and a 6x10 IR sensor array, the MAX25205 detects swipe and hand-rotation gestures without the complexity of ToF cameras at 10x lower cost and up to 75% smaller size.
"Maxim Integrated's MAX25205 is a game changer for the automotive industry," said Szu-Kang Hsien, executive business manager for Automotive Business Unit at Maxim. "By offering the most dynamic gesture control for automotive applications at the lowest cost, automakers can avoid the prohibitive costs of time-of-flight camera solutions and offer gesture sensing in more car models. It offers a stylish, cool factor to cars, especially for laid back drivers who prefer to use gesture for control with the added benefit of keeping their touch screens dirt-free."
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Tobi Delbruk and Zhenming Yu from Zurich University publish a video presentation explaining their ISCAS 2020 paper "Self Calibration of Wide Dynamic Range Bias Current Generators ISCAS."
"Many neuromorphic chips now include on-chip, digitally programmable bias generator circuits. So far, precision of these generated biases has been designed by transistor sizing and circuit design to ensure tolerable statistical variance due to threshold mismatch. This paper reports the use of an integrated measurement circuit based on spiking neuron and a scheme for calibrating each chip set of biases against the smallest of all the biases from that chip. That way, the averaging across individual biases improves overall matching both within a chip and across chips. This paper includes measurements of generated biases, the method for remapping bias values towards more uniform values, and measurements across 5 sample chips. With the method presented in this paper, 1σ mismatch of subthreshold currents is decreased by at least a factor of 3. The firmware implementation completes calibration in about a minute and uses about 1kB of flash storage of calibration data."
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I came across an article talking about CIS prices in China in the second half of 2018. This somewhat outdated info gives an indication of how low the prices can be for a fairly complicated device:
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Broadcom keeps quietly expanding its ToF sensors lineup:
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BusinessWire: Cepton announces its automotive-grade lidar – the Vista-X90, priced at less than $1000 for high volume applications. It is said to set a new benchmark for high performance at low power in a compact form factor. Weighing less than 900 g, the Vista-X90 achieves up to 200 m range at 10% reflectivity with an angular resolution of 0.13° and power consumption of <12W. The sensor supports frame rates of up to 40 Hz.
With a width of 120 mm, depth of 110 mm and a front-facing height of <45 mm, Vista-X90 is compact and embeddable. Its 90° x 25° field of view, combined with its directional, non-rotational design allows seamless vehicle integration - such as in the fascia, behind the windshield or on the roof.
Vista-X90 has a licensable design architecture powered by Cepton’s patented Micro Motion Technology (MMT) – a frictionless, mirrorless, rotation-free lidar architecture. Cepton has licensed its technology to the world’s largest automotive headlamp Tier 1, Koito, who has non-exclusive rights to manufacture and sell Cepton’s lidar technology for an automotive applications, using key modules supplied by Cepton.
“We are excited to disrupt the industry with the Vista-X90, which is the most cost-effective, high-performance lidar in the world for automotive applications,” said Jun Pei, Cepton’s CEO. “Automotive lidars have historically had either low performance at acceptable cost or claimed high performance while being too expensive for many OEM programs. The Vista-X90 fundamentally changes the game by bridging that divide and delivering the optimal mix of performance, power, reliability and cost. This is an integral part of our plan to make lidar available as an essential safety device in every consumer vehicle in the world.”
The Vista-X90 is targeted for production in 2022 and beyond, and samples can be made available upon request.
Yole publishes an interview with Ouster CEO Angus Pacala "A rising star in the LiDAR landscape – An interview with Ouster." Few quotes:
"Since our founding in 2015, Ouster has secured over 800 customers and $140 million in funding. Our headquarters is in San Francisco, and we have offices in Paris, Hamburg, Frankfurt, Hong Kong, and Suzhou.
At the time, nobody thought that you could use VCSELs and SPADs to make a high-performance sensor, but we figured out how to do it and patented our approach. The design relies on these two chips with the lasers and detectors, and a lens in front of each chip. In that way, digital lidar really resembles a digital camera."
Voyant Photonics publishes a Medium article "LiDAR-on-a-Chip is Not a Fool’s Errand" with bold claims on its FMCW LiDAR capabilities:
"With every pulse our FMCW LiDAR receives reflectance and polarization measurements that let it differentiate pavement from metal, hands from coffee mugs, street signs from rubber tires, and of course a pot hole from a plastic bag. We expect to read painted markings on asphalt, in total darkness, far past where cameras could. FMCW Lidar is like a sensor from Star Trek. It can tell you where something is, how fast it’s moving, and also what it is made of.
Voyant’s devices are not science fiction. They fit in your hand. They are real. We plan on producing more of them by the end of 2022 than Velodyne has sold across all its products in the last 13 years.
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SICK AG is working with Microsoft to enable the development of commercial industrial 3D cameras and related solutions, which will be compatible with a Microsoft ecosystem built on top of Microsoft depth, Intelligent Cloud, and Intelligent Edge platforms. Selected customers are already testing SICK cameras that incorporate Microsoft ToF depth technology.
SICK and Microsoft are expanding 3D ToF technologies in the context of Industry 4.0, to bring state of the art technologies to SICK’s 3DToF Visionary-T camera product line, and make it smarter, using Azure Intelligent Cloud and Intelligent Edge capabilities.
SICK’s latest industrial 3DToF camera Visionary-T Mini is expected to be available for sales in early 2021, while prototypes are already available now. Visionary-T Mini incorporates another variant of Microsoft’s 3D ToF technology with an impressive dynamic range and a resolution of ~510 x 420 pixels. It will offer extended performance and advanced on-device processing infrastructure and tools not currently available with Azure Kinect DK, to include, but not limited to: 24/7 robustness, industrial interfaces, enhanced resolution with sharper depth images and enhanced depth quality.
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The Canon EOS C70 is the smallest and lightest member of the Cinema EOS range and the first to employ the RF lens mount. It’s aimed at documentary, news, corporate, social media and event videography, combining the pro capabilities of the Cinema EOS series with the compact form factor of the EOS R range. Find out more in my preview!…
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Tobi Delbruck from Zurich University, Switzerland, publishes a confession session "Lessons Learned the Hard Way" that he has organized at ISCAS 2020. Many of the confessions are related to the camera technology. Most of them are coverered in the video, but some appear only in the conference paper.Image Sensors World Go to the original article...
BusinessWire: Analog Devices announces a strategic collaboration with Microsoft to leverage Microsoft’s 3D ToF sensor technology.
“Our customers want depth image capture that ‘just works’ and is as easy as taking a photo,” said Duncan Bosworth, GM, Consumer Business Unit, Analog Devices. “Microsoft’s ToF 3D sensor technology used in the HoloLens mixed-reality headset and Azure Kinect Development Kit is seen as the industry standard for time-of-flight technologies. Combining this technology with custom-built solutions from ADI, our customers can easily deploy and scale the next generation of high-performance applications they demand, out of the box.”
“Analog Devices is an established leader in translating physical phenomena into digital information,” said Cyrus Bamji, Microsoft Partner Hardware Architect, Microsoft. “This collaboration will expand market access of our ToF sensor technology and enable the development of commercial 3D sensors, cameras, and related solutions, which will be compatible with a Microsoft ecosystem built on top of Microsoft depth, Intelligent Cloud, and Intelligent Edge platforms.”
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Edinbough University publishes an OSA Optica paper "High-speed 3D sensing via hybrid-mode imaging and guided upsampling" by Istvan Gyongy, Sam W. Hutchings, Abderrahim Halimi, Max Tyler, Susan Chan, Feng Zhu, Stephen McLaughlin, Robert K. Henderson, and Jonathan Leach.
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Ams publishes a couple of videos about its 3D sensing solutions:
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TaipeiTimes: Taiwan-based fingerprint sensor company Egis has filed a optical fingerprint patent infringement lawsuit with Beijing’s Intellectual Property Court against China-based world's largest fingerpint sensors manufacturer Goodix. Egis has requested the court to immediately stop Goodix’s practice and destroy all problematic products. It is also seeking 90M yuan (US$13.24M) in damages.
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Lynred starts publishing tutorials on IR imaging. The first part is Infrared detection basics.
Teledyne Princeton Instruments publishes a tutorial "The Fundamentals Behind Modern Scientific Cameras."
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LaserFocusWorld publishes an interview with Shauna McIntyre, the new CEO of Sense Photonics. Few quotes:
"We have core flash lidar technology in the laser emitter, the detector array, and the algorithms and software stack. The proprietary laser emitter is based on a large VCSEL array, which provides high, eye-safe optical output power for long-range detection and wide field-of-view at a low cost point that is game-changing. Because the emitter’s wavelength is centered around 940 nm, our detector array can be based on inexpensive CMOS technology for low cost, and we get the added benefit of lower background light from the sun for a higher signal-to-noise ratio. From an architecture perspective, we intentionally chose a flash architecture because of its simple camera-like global shutter design, scalability to high-volume manufacture, the benefit of having no moving parts, and most importantly, it enables low cost.
Our laser array is a network consisting of thousands of VCSELs interconnected in a way that provides short pulses of high-power light. In keeping with our philosophy of design simplicity and high performance for our customers, we actuate the array to generate a single laser flash rather than adding complexity and cost associated with a multi-flash approach."
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The INSTAX SQ1 is the latest instant camera from Fujifilm to use INSTAX square film. Like the hugely popular INSTAX Mini series, the SQ1 is a fully analogue camera, ejecting small prints which gradually develop before your eyes. Find out which INSTAX is best for you in my review!…
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QQ.com, DayDayNews: Will Semiconductor has quitely acquired Celepixel, a Shanghai-based developer of dynamic vision sensors (DVS). Will Semi already owns Omnivision and Superpix.
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Phys.org: Physical Review paper "Molecular Platform for Frequency Upconversion at the Single-Photon Level" by Philippe Roelli, Diego Martin-Cano, Tobias J. Kippenberg, and Christophe Galland from EPFL and Max Planck Institute proposes a way to convert photons with wavelength of 60um to 3um to 0.5-1um ones.
"Direct detection of single photons at wavelengths beyond 2um under ambient conditions remains an outstanding technological challenge. One promising approach is frequency upconversion into the visible (VIS) or near-infrared (NIR) domain, where single-photon detectors are readily available. Here, we propose a nanoscale solution based on a molecular optomechanical platform to up-convert photons from the far- and mid-infrared (covering part of the terahertz gap) into the VIS-NIR domain. We perform a detailed analysis of its outgoing noise spectral density and conversion efficiency with a full quantum model. Our platform consists in doubly resonant nanoantennas focusing both the incoming long-wavelength radiation and the short-wavelength pump laser field into the same active region. There, infrared active vibrational modes are resonantly excited and couple through their Raman polarizability to the pump field. This optomechanical interaction is enhanced by the antenna and leads to the coherent transfer of the incoming low-frequency signal onto the anti-Stokes sideband of the pump laser. Our calculations demonstrate that our scheme is realizable with current technology and that optimized platforms can reach single-photon sensitivity in a spectral region where this capability remains unavailable to date."
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LetsGoDigital noticed that Samsung has registered ISOCELL Vizion trademark:
"Samsung ISOCELL Vizion trademark description: Time-of-flight (TOF) optical sensors for smartphones, facial recognition system comprising TOF optical sensors, 3D modeling and 3D measurement of objects with TOF sensors; Dynamic Vision Sensor (DVS) in the nature of motion sensors for smartphones; proximity detection sensors and Dynamic Vision Sensor (DVS) for detecting the shape, proximity, movement, color and behavior of humans."
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LetsGoDigital noticed that Samsung has registered ISOCELL Vizion trademark:
"Samsung ISOCELL Vizion trademark description: Time-of-flight (TOF) optical sensors for smartphones, facial recognition system comprising TOF optical sensors, 3D modeling and 3D measurement of objects with TOF sensors; Dynamic Vision Sensor (DVS) in the nature of motion sensors for smartphones; proximity detection sensors and Dynamic Vision Sensor (DVS) for detecting the shape, proximity, movement, color and behavior of humans."
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University of Florence, FORLAB, and AMPED Software, Italy, publish an interesting arxiv.org paper "A leak in PRNU based source identification? Questioning fingerprint uniqueness" by Massimo Iuliani, Marco Fontani, and Alessandro Piva.
"Photo Response Non Uniformity (PRNU) is considered the most effective trace for the image source attribution task. Its uniqueness ensures that the sensor pattern noises extracted from different cameras are strongly uncorrelated, even when they belong to the same camera model. However, with the advent of computational photography, most recent devices of the same model start exposing correlated patterns thus introducing the real chance of erroneous image source attribution. In this paper, after highlighting the issue under a controlled environment, we perform a large testing campaign on Flickr images to determine how widespread the issue is and which is the plausible cause. To this aim, we tested over 240000 image pairs from 54 recent smartphone models comprising the most relevant brands. Experiments show that many Samsung, Xiaomi and Huawei devices are strongly affected by this issue. Although the primary cause of high false alarm rates cannot be directly related to specific camera models, firmware nor image contents, it is evident that the effectiveness of PRNU-based source identification on the most recent devices must be reconsidered in light of these results. Therefore, this paper is to be intended as a call to action for the scientific community rather than a complete treatment of the subject."
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Melexis publishes an article on its history in automotive ToF imaging, starting from cooperation with Free University of Brussels (VUB), continuing with VUB spin-off Softkinetic that was acquired by Sony and renamed to Sony Depthsensing Solutions.
So far, Melexis has shipped 1M automotive ToF sensors:
"At Melexis, we are proud of having designed the first automotive qualified ToF sensor IC with our first generation MLX75023. This proves our capability to not only design but also produce the new technology in line with stringent automotive quality standards. It is therefore with great pleasure that we are the first to have reached in 2019 the impressive milestone of having more than 1 million ToF image sensor ICs on the road."
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Yole Developpement report "Artificial intelligence and mass surveillance are pushing the camera and computing market to $38B in revenue by 2025" says:
