Fiducial marker A fiducial marker or fiducial is an object placed in the field of view of an imaging system which appears in the image produced, for use as a point of reference or a measure. It may be either something placed into or on the imaging subject, or a mark or set of marks in the reticle of an optical instrument. Accuracy[edit] In high-resolution optical microscopy, fiducials can be used to actively stabilize the field of view. Applications[edit] Snipers[edit] Snipers use fiducial markers to determine their targets' distance. Physics[edit] In physics, 3D computer graphics, and photography, fiducials are reference points: fixed points or lines within a scene to which other objects can be related or against which objects can be measured. Geographical Survey[edit] Airborne geophysical surveys also use the term "fiducial" as a sequential reference number in the measurement of various geophysical instruments during a survey flight. Virtual Reality[edit] Medical imaging[edit] ECG[edit] Cell Biology[edit]
Where do I find transparent coatings that show up in near-infrared photography? - IR nearinfrared paint I need a non-toxic coating that is transparent under visible light but appears much darker/lighter in near-infrared photography. My dear chemist, physicists, and material scientists, I am working on a project where I want to coat uniform surfaces with a substance that appears transparent or semitransparent in normal human vision but shows up really well under near-infrared photography. My infrared camera is a USB web cam with the IR filter replaced with some flavor of IR-Pass filter. I should be able to make my own paint if you can point me in the direction of a pigment that will have the desired results. I do computer vision work and I want to detect image features on substances that would otherwise look fairly featureless (like a wall, or a tabletop).
The next generation stylus - iPen 2 by Cregle Inc. Improvements of iPen 2 from iPen 1 iPen 2 is more than just an upgrade to iPen 1. From a completely new, beautiful and sleek design, to new technology from the inside out, we’ve completely rethought what a stylus can be. We have developed two versions, one that supports iPad and one for Apple Displays (glass) and iMacs (Mid 2007 and newer) running either Mac OS or Windows. Pressure Sensitive: iPen 2 recognizes up to 1024 levels of pressure. iMac model retails for $169 iPen 2 is a next generation stylus that enables you to write directly on your screen. iPad model retails for $119 iPen 2 for iPad brings the dream of accurate and expressive writing and drawing to your iPad. Due to iOS restriction, iPen 2 is not a universal stylus for iPad. iPen 2 uses different chipsets from iPen 1. iPad 5 compatibility iPad 5 is expected to hit the market this spring and we plan to have the iPen receiver case compatible with iPad 5. 12/2012 Complete engineering verification testing (EVT) About the video
Putting Pencil to Paper: FiftyThree debuts the best iPad stylus yet In the two years since Paper for iPad launched, creator FiftyThree has witnessed dozens if not hundreds of styluses compete for the crown of “best stylus.” Today, the company has finally thrown its hat in the ring with Pencil, a Bluetooth Low Energy (BLE) stylus for tablets. FiftyThree’s first hardware device ships today in two models: walnut hardwood, for $59.95, and aluminum “graphite,” for $49.95. Pencil, perhaps, is the first Bluetooth stylus that normal people will love. Thanks to BLE, the device can survive for a month of normal use without a charge, FiftyThree says. On the other hand, since Paper knows you’re using a stylus, it affords FiftyThree a new degree of flexibility when creating new features only accessible using your hands. Digital charcoal Digital charcoal Paper contains a tasteful mix of real-world metaphors, like a virtual notebook to hold your sketches and uniquely digital interactions like Rewind, which lets you undo by swiping two fingers in a circle.