Rudolf Kiefer

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Extremely small cameras and many cell phones simply do not have enough room to allow users to move a rigid lens the distance required for a varying range of focal lengths. An adaptive liquid lens, however, enables small cameras to focus without needing extra room. An autofocus liquid lens provides several advantages over a traditional lens in terms of(More)
In this paper, we propose a new super resolution technique based on iterative interpolation followed by registering them using back projection (BP). Firstly the low resolution image is interpolated and then decimated to four low resolution images. The four low resolution images are interpolated and registered by using BP in order to generate a sharper high(More)
BACKGROUND Biochar amendment is a promising tool to improve the soil quality and, consequently, higher crop yield has received more attention during last decades. The positive effects of biochar have been attracting more attention especially in the areas with low precipitation rates, such as the Middle East, due to low soil organic carbon content, higher(More)
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These days micro lenses are used in many optical devices such as micro camera, cell phone and endoscopic medical imaging. In this work a passive autofocus system for a liquid lens with Dielectric Elastomer Actuator (DEA) which can easily achieve the function of auto focus without any active component such as ultrasonic or infrared in comparison with the(More)
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