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The Hollow-Face illusion (also known as Hollow-Mask illusion) is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. While a convex face will appear to look in a single direction, and the gaze of a flat face, such as the Lord Kitchener Wants You poster, can appear to track a moving viewer, a ...
Convex and strictly convex grid drawings of the same graph. In graph drawing, a convex drawing of a planar graph is a drawing that represents the vertices of the graph as points in the Euclidean plane and the edges as straight line segments, in such a way that all of the faces of the drawing (including the outer face) have a convex boundary.
The painting depicts the young artist (then twenty one) in the middle of a room, distorted by the use of a convex mirror. The hand in the foreground is greatly elongated and distorted by the mirror. The work was painted on a specially-prepared convex panel in order to mimic the curve of the mirror used.
This table shows the 11 convex uniform tilings (regular and semiregular) of the Euclidean plane, and their dual tilings. There are three regular and eight semiregular tilings in the plane. The semiregular tilings form new tilings from their duals, each made from one type of irregular face.
Japanese manga has developed a visual language or iconography for expressing emotion and other internal character states. This drawing style has also migrated into anime, as many manga are adapted into television shows and films and some of the well-known animation studios are founded by manga artists.
Emojis can be so helpful yet so confusing. Here's a breakdown of what the black heart emoji means and how and when it can be used.
Convex mirror lets motorists see around a corner. Detail of the convex mirror in the Arnolfini Portrait. The passenger-side mirror on a car is typically a convex mirror. In some countries, these are labeled with the safety warning "Objects in mirror are closer than they appear", to warn the driver of the convex mirror's distorting effects on distance perception.
Brown Heart. This was the least used heart emoji on Twitter in 2021, per Emojipedia. That said, it does have its own unique purposes: Emojipedia's data shows that words like "skin" and "Black" are ...