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This paper reports a laser diffraction measuring system based on a lab made 26M (5120×5120) pixels image sensor with a pixel pitch of 0.95μm. The long distance required in the traditional method to match the surface of the image sensor with large pixels is shortened, and the image sensor with submicron pixels becomes the key to capture the patterns at short range which is still meet the condition...
Lens-free on-chip microscopy has many advantages compared with lens-based microscopy such as lightweight of hardware, low cost and improved resolution etc. A microscopy algorithm is proposed in this paper and its merits include high resolution, strong robustness, insensitivity to initial state of the object. Theories related to diffraction are introduced as the premise. 2D log-Gabor filters with different...
This paper reports a readout integrated circuit with embedded data compression function for image sensors. Data compression is realized by adding a comparator in a two-step incremental sigma-delta analog-to-digital converter (ADC) with a fully floating double sampling integrator. The output difference between two adjacent pixels is compared with a predefined threshold using the comparator to detect...
This paper presents a novel incremental Σ-Δ ADC using two-step conversion and the fully-floating double-sampling integrator to greatly reduce the converting time. With a special procedure to solve the accuracy loss problem, the resolution of ADC is improved by one bit at the same time. What's more, another comparison is added during the conversion to detect redundant pixels in the image so that data...
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