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Title : Tetromino Binning vs Regular Binning in Low Light
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Tetromino Binning vs Regular Binning in Low Light

Univeristat Erlangen-Nurnberg, Germany, publishes Arxiv.org paper "Image Super-Resolution Using T-Tetromino Pixels" by Simon Grosche, Andy Regensky, Jürgen Seiler, André Kaup.

"For modern high-resolution imaging sensors, pixel binning is performed in low-lighting conditions and in case high frame rates are required. To recover the original spatial resolution, single-image super-resolution techniques can be applied for upscaling. To achieve a higher image quality after upscaling, we propose a novel binning concept using tetromino-shaped pixels. In doing so, we investigate the reconstruction quality using tetromino pixels for the first time in literature. Instead of using different types of tetrominoes as proposed in the literature for a sensor layout, we show that using a small repeating cell consisting of only four T-tetrominoes is sufficient. For reconstruction, we use a locally fully connected reconstruction (LFCR) network as well as two classical reconstruction methods from the field of compressed sensing. Using the LFCR network in combination with the proposed tetromino layout, we achieve superior image quality in terms of PSNR, SSIM, and visually compared to conventional single-image super-resolution using the very deep super-resolution (VDSR) network. For the PSNR, a gain of up to +1.92 dB is achieved."

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