VISUALLY PERCEIVED AREA CREATED EITHER BY AN ENCLOSING LINE OR COLOR

CONSISTS OF PREDICTABLE, PRECISE EDGES THAT APPEAR TO HAVE A MACHINE MADE QUALITY

CONSISTS OF NATURAL, CURVING, UNPREDICTABLE EDGES

HAVE DISTINCT EDGES CREATED BY ABRUPT CHANGES IN COLOR,VALUE,PATTERN, OR TEXTURE

CREATED BY GRADUAL OR INDISTINCT CHANGES IN COLOR,VALUE,TEXTURE,AND PATTERN