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A sketch (ultimately from Greek σχέδιος – schedios, "done extempore" [1] [2] [3]) is a rapidly executed freehand drawing that is not usually intended as a finished work. [4] A sketch may serve a number of purposes: it might record something that the artist sees, it might record or develop an idea for later use or it might be used as a ...
Figure drawing by Leonardo da Vinci. A figure drawing is a drawing of the human form in any of its various shapes and postures, using any of the drawing media. The term can also refer to the act of producing such a drawing. The degree of representation may range from highly detailed, anatomically correct renderings to loose and expressive sketches.
Dekeyzer gives its date as circa 1460, and remarks it can be dated to the last years of van der Weyden's career on the basis of style, the broad forehead and narrow heavy-lidded eyes of the Virgin bearing a marked resemblance to the one in the Diptych of Philip de Croÿ with The Virgin and Child, which can be dated to 1460 on historical grounds ...
The woman's eyes are half-closed and completely ignore the outside world and viewer, while her mouth is slightly shaped into an ambiguous smile, evocative of the Mona Lisa. [3] Other than her face that takes up most of the painting, the rest of the painting is barely even sketched in, with a primed, but unpainted, background. [ 4 ]
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An eyelid (/ ˈ aɪ. l ɪ d / EYE-lid) is a thin fold of skin that covers and protects an eye. The levator palpebrae superioris muscle retracts the eyelid, exposing the cornea to the outside, giving vision. This can be either voluntarily or involuntarily. "Palpebral" (and "blepharal") means relating to the eyelids.
The visual system is the physiological basis of visual perception (the ability to detect and process light).The system detects, transduces and interprets information concerning light within the visible range to construct an image and build a mental model of the surrounding environment.
Feature-based systems essentially rely on the selection of individual features in isolation. Individual facial features (eyes, nose, mouth, eyebrows, etc.) are selected one at a time from a large database and then electronically 'overlaid' to make the composite image. This allows images to be created when suitable artistic talent is not available.