A 1/2inch 48M All PDAF CMOS Image Sensor Using 0.8µm Quad Bayer Coding 2×2OCL with 1.0lux Minimum AF Illuminance Level

Okawa, T.; Ogasahara, Takayuki; Kitano, Yasuyuki; Tatani, Keiji; Ooki, Susumu; Yamajo, Hiroaki; Kawada, M.; Tachi, Masayuki; Goi, K.; Yamasaki, Tokiwa; Iwashita, Hikaru; Nakamizo, Masahiko

doi:10.1109/iedm19573.2019.8993499

Cited by 19 publications

(11 citation statements)

References 1 publication

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“…To maximize sensitivity, a back-side illumination (BSI) sensor was developed and commercialized, 3−5 and structural improvements of BSI sensors are ongoing. 6,7 In addition, another approach using a CMOS image sensor (CIS) with an organic photoconductive film (OPF) laminated on pixel circuits was reported. 8−11 Moreover, from the viewpoint of the pixel arrangement, the use of a Bayer CFA reduces the resolution, owing to the demosaicing process and some loss of incident light, as shown in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, pixel size miniaturization reduces the sensitivities of sensors through a decrease in the number of incident photons per pixel. To maximize sensitivity, a back-side illumination (BSI) sensor was developed and commercialized, − and structural improvements of BSI sensors are ongoing. , In addition, another approach using a CMOS image sensor (CIS) with an organic photoconductive film (OPF) laminated on pixel circuits was reported. − …”

Section: Introductionmentioning

confidence: 99%

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Color-Filter-Free Three-Layer-Stacked Image Sensor Using Blue/Green-Selective Organic Photoconductive Films with Thin-Film Transistor Circuits on CMOS Image Sensors

Sakai¹,

Takagi²,

Imamura³

et al. 2021

ACS Appl. Electron. Mater.

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In this paper, we describe a three-layer-stacked color image sensor comprising two organic photoconductive films (OPFs) with thin-film transistor-based readout circuits and a complementary metal–oxide–semiconductor (CMOS) image sensor. In this three-layer-stacked sensor, a blue-sensitive OPF selectively absorbs blue light, a green-sensitive OPF selectively absorbs green light, and a CMOS image sensor (CIS) receives red light. Color video imaging operation at 60 frames per second was confirmed for a prototype sensor having 320 × 240 pixels with a pixel pitch of 20 μm without a color filter array, and good color separation and a linear response of the sensor were achieved owing to the combination of the CIS and color-selective OPFs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Color-Filter-Free Three-Layer-Stacked Image Sensor Using Blue/Green-Selective Organic Photoconductive Films with Thin-Film Transistor Circuits on CMOS Image Sensors

Sakai¹,

Takagi²,

Imamura³

et al. 2021

ACS Appl. Electron. Mater.

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“…This is a division-of-focal-plane sensor, in which each pixel senses one spectral channel and one polarization channel. The filter arrays are composed of three spectral channels (c ∈ R; G; B) spatially organized in a Quad-Bayer arrangement 34 and four polarization channels (p ∈ f0;45;90;135g deg) arranged in a Chun pattern 35 [see Fig. 1(b)].…”

Section: Hardwarementioning

confidence: 99%

Snapshot spectropolarimetric imaging using a pair of filter array cameras

et al. 2022

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Spectral and polarization imaging (SPI) is an emerging sensing method that permits the analysis of both spectral and polarization information of a scene. The existing acquisition systems are limited by several factors, such as the space requirement, the inability to capture quickly the information, and the high cost. We propose an SPI acquisition system with a high spatial resolution that combines six spectral channels and four polarization channels. The optical setup employs two color-polarization filter array cameras and a pair of bandpass filters. We define the processing pipeline, consisting of preprocessing, geometric calibration, spectral calibration, and data transformation. We show that, around specular highlights, the spectral reconstruction can be improved by filtering the polarized intensity. We provide a database of 28 spectropolarimetric scenes with different materials for future simulation and analysis by the research community.

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“…2. It uses a Quad Bayer Coding (QBC) [52], for the arrangement of its CFA elements instead. Then, the superpixel array configuration for the raw image, can be obtained by adding the PFA to the QBC arrangement, see Fig.…”

Section: Color Polarization Image Pre-processingmentioning

confidence: 99%

Polarization Image Laser Line Extraction Methods for Reflective Metal Surfaces

2022

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In this work, we propose a novel pipeline method for laser line extraction from images with a polarization image sensor. The proposed method is specially developed for strong laser beam reflections from metal surfaces. For the pre-processing stage, we propose a demosaicing algorithm for color polarizer filter array (CPFA) sensors. This can be implemented by using either one quarter or full resolution of the sensor. In addition, we propose two methods for optimizing the information available in a 12-channel color polarization image: The first method, is based on the minimum linearly polarized irradiance, and the second method, is based on the linear polarization intensity. These preprocessing, and optimization methods are combined with laser line extraction methods. The laser line extraction is done with either the Polarized Finite Impulse Response (FIR) Center Of Gravity (COG), where the laser line coordinates are computed from the filtered laser intensity distribution, or with the Polarized FIR-Peak, where the laser line coordinates are calculated from the first derivative of the filtered laser signal. The performance of the proposed algorithms is studied experimentally using a laser line scanner assembly, made of a polarization camera, and a laser line projector operating in the blue wavelength range.

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A 1/2inch 48M All PDAF CMOS Image Sensor Using 0.8µm Quad Bayer Coding 2×2OCL with 1.0lux Minimum AF Illuminance Level

Cited by 19 publications

References 1 publication

Color-Filter-Free Three-Layer-Stacked Image Sensor Using Blue/Green-Selective Organic Photoconductive Films with Thin-Film Transistor Circuits on CMOS Image Sensors

Color-Filter-Free Three-Layer-Stacked Image Sensor Using Blue/Green-Selective Organic Photoconductive Films with Thin-Film Transistor Circuits on CMOS Image Sensors

Snapshot spectropolarimetric imaging using a pair of filter array cameras

Polarization Image Laser Line Extraction Methods for Reflective Metal Surfaces

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