Per-Pixel Coded Exposure for High-Speed and High-Resolution Imaging Using a Digital Micromirror Device Camera

Feng, Wei; Zhang, Fumin; Qu, Xinghua; Zheng, Shiwei

doi:10.3390/s16030331

Cited by 14 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The novel camera architecture provides a compelling combination of features, including a minimal data volume, extensive dynamic range, and exceptional imaging quality, making it highly potential for various HDR imaging applications, such as machine vision, autonomous driving, and industrial inspection. Unlike iterative methods [78][79][80][81] based on a specific scene, the exposure mask is optimized based on a HDR dataset during the training phase. In the inference phase, the mask remains static and can be flexibly implemented with existing cameras such as using neutral density filters, making it more suitable for dynamic HDR imaging.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Pixel-wise exposure control for single-shot HDR imaging: A joint optimization approach

Liang,

Huang,

et al. 2024

APL Photonics

View full text Add to dashboard Cite

Dynamic range is one of the primary limitations that restricts digital image sensors from acquiring more visual information. Current high dynamic range (HDR) imaging techniques entail a trade-off between dynamic range and visual fidelity. In this work, we propose a HDR imaging method, termed PE-HDR, to achieve both a wide dynamic range and high visual fidelity without additional complex post-processing algorithms. Instead of merging a bracketed exposure sequence, the PE-HDR captures HDR images in a single shot using optical coded pixel-wise exposure control, enabling cost-effective and flexible HDR imaging. By incorporating a differentiable optical encoder and a neural network decoder, we jointly optimize the imaging pipeline from light irradiance to digital image signals, thereby refining the pixel-wise exposure control strategy and improving image fidelity. Both simulations and experiments demonstrate that the proposed method achieves a dynamic range of up to 120 dB and an excellent visual fidelity with spatial resolution of up to 2560 × 1600 pixels.

show abstract

Section: Conclusion and Discussionmentioning

confidence: 99%

Pixel-wise exposure control for single-shot HDR imaging: A joint optimization approach

Liang,

Huang,

et al. 2024

APL Photonics

View full text Add to dashboard Cite

show abstract

“…Spatial light modulation (SLM) technology can achieve the intensity modulation of incident light according to the computer control of the on/off state of each micro-mirror and generate various high-contrast accurate figures. The projection image, generated by DMD [13,14,15,16,17,18], is composed of “on” and “off” for the micro-lens. Generally speaking, the micro-mirror array on the DMD chip is divided into X direction and Y direction, which corresponds to two-dimensional detection points on the surface of the workpiece with high reflection rotation.…”

Section: The System For Visual Imagingmentioning

confidence: 99%

Smooth Surface Visual Imaging Method for Eliminating High Reflection Disturbance

Shao

Liu

Shao

et al. 2019

Sensors

View full text Add to dashboard Cite

At present, visual imaging is widely applied for surface defects such as bumps and scratches in the manufacture of precise parts with a highly reflective surface. However, the high light reflection and halo disturbance as a result of the illumination in visual imaging exert a direct influence on the accuracy of defect detection. In this regard, the present paper develops an adaptive illumination method based on space–time modulation for a visual imaging system. Furthermore, a digital micro-mirror device (DMD) is employed to realize the pixel-level spatiotemporal modulation of illumination. Then, in combination with the illumination intensity feedback of charge coupled device (CCD), the time-space ratio is adjusted automatically to achieve adaptive uniform illumination and effectively suppress the high light reflection and halo disturbance of highly reflective surfaces. The experimental results show that, in terms of restraining high light disturbance, the visibility and accuracy of visual imaging are improved.

show abstract

“…Thus, ultrafast encoding over each pixel is beneficial from the standpoint of improving reconstruction fidelity 34 . This pixel-wise coded exposure was implemented by using various techniques, such as spatial light modulators (e.g., a digital micromirror device 35 , 36 and a liquid-crystal-on-silicon device 37 ), a translating printed pattern 38 , 39 , and in-pixel memory in the CMOS architecture 40 . However, the imaging speeds enabled by these methods are clamped to several thousand fps by either the pattern refreshing rates of the spatial light modulators 41 , the moving speed of the piezo stages, or the readout electronics of the imaging sensor.…”

Section: Introductionmentioning

confidence: 99%

Swept coded aperture real-time femtophotography

Liu,

Marquez,

Lai

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Single-shot real-time femtophotography is indispensable for imaging ultrafast dynamics during their times of occurrence. Despite their advantages over conventional multi-shot approaches, existing techniques confront restricted imaging speed or degraded data quality by the deployed optoelectronic devices and face challenges in the application scope and acquisition accuracy. They are also hindered by the limitations in the acquirable information imposed by the sensing models. Here, we overcome these challenges by developing swept coded aperture real-time femtophotography (SCARF). This computational imaging modality enables all-optical ultrafast sweeping of a static coded aperture during the recording of an ultrafast event, bringing full-sequence encoding of up to 156.3 THz to every pixel on a CCD camera. We demonstrate SCARF’s single-shot ultrafast imaging ability at tunable frame rates and spatial scales in both reflection and transmission modes. Using SCARF, we image ultrafast absorption in a semiconductor and ultrafast demagnetization of a metal alloy.

show abstract

Per-Pixel Coded Exposure for High-Speed and High-Resolution Imaging Using a Digital Micromirror Device Camera

Cited by 14 publications

References 34 publications

Pixel-wise exposure control for single-shot HDR imaging: A joint optimization approach

Pixel-wise exposure control for single-shot HDR imaging: A joint optimization approach

Smooth Surface Visual Imaging Method for Eliminating High Reflection Disturbance

Swept coded aperture real-time femtophotography

Contact Info

Product

Resources

About