Clemar Schurrer

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In mammals, photoreceptors located in the inner retina convey photic information to the brain, regulating diverse non-image-forming tasks such as pupillary light reflexes and photic synchronization (entrainment) of daily activity rhythms. In nonmammalian vertebrates, the retina, deep brain photoreceptors, and pineal organ may be photoreceptive. Here we(More)
—External visual interfaces for high precision measuring devices are based on the segmentation of images of their measuring reticle. In this paper, a method for subpixel straight lines detection is presented and tested on images taken from the reticle of a dark field autocollimator. The method has three steps, the sharpening of the image using a version of(More)
PURPOSE The vertebrate inner retina has a subset of intrinsically photosensitive retinal ganglion cells (ipRGCs) that express the nonvisual photopigment melanopsin. The intrinsically photosensitive retinal ganglion cells send light information from the environment to the brain to control, among other parameters, the amount of energy entering the eyes(More)
INTRODUCTION Chronic daily headache (CDH) is a chronic painful clinical condition that is frequently found in neurological practice. Diagnosis is clinical and the therapeutic approach is complex. Its mechanism of production is still not altogether clear, but a genetic component is acknowledged as a predisposing factor. Numerous areas are involved in the(More)
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