The St. Bernard or St Bernard is a breed of very large working dog from the western Alps in Italy and Switzerland. They were originally bred for rescue work by the hospice of the Great St Bernard Pass on the Italian-Swiss border. The hospice, built by and named after Italian monk Bernard of Menthon, acquired its first dogs between 1660 and 1670. The breed has become famous through tales of Alpine rescues, as well as for its large size. The St. Bernard is recognized internationally today as one of the Molossoid breeds. It is a giant dog. The coat can be either smooth or rough; the smooth coat being close and flat, while the rough is dense, flat, and more profuse around the neck and legs. The colour is typically a red shade with white, or a mahogany brindle with white. Black shading is usually found on the face and ears. The tail is long and heavy, hanging high. The eyes are usually brown, but sometimes can be icy blue, and should have naturally tight lids, with haws only slightly visible.
Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries. A color range in the foreground footage is made transparent, allowing separately filmed background footage or a static image to be inserted into the scene. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen – chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate the color used as the backing.
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