The quantity of an object or substance with respect to reflected by the object, usually determined visually by measurement of hue, saturation, and brightness of the reflected light, saturation chroma
In terms of art, line is considered to be a moving dot. It has an endless number of uses in the creation of Art, Line can control an viewer's eye. It can describe edges. It can indicate form as well as movement. It can also indicate value and a light source in drawing.
In art texture appeals to the sense of touch and is the tactile feeling of an art piece. Both two - dimensional art forms use texture to convey themes of the work. Three-dimensional art forms, including marble, clay, iron and wood sculptures, offer texture in the form of waxing, polishing, painting and sanding the surface. Other forms of art, such as public memorials like the Vietnam Veteran's Memorial in Washington D.C., are meant to be touched
Artists use this capability of the human brain to create optical illusions. For example, an object on a two-dimensional surface seems to exist in three dimensions, and a white and black drawing can seem colourful. Also, it can be difficult to distinguish between a figure and the ground in an image because both make sense and are recognizable objects
Shape is very two dimensional, while form adds a third dimension because of the volume of an object. The eye is immediately drawn to form in an image and the art of creating this form is achieved by showing the contours of a subject—the human body as in a sumo wrestler, or the bold contours of round rocks on the seashore.
Positive space refers to the main focus of a picture, while negative space refers to the background. When used creatively and intelligently, positive and negative space together can tell a story using visual composition alone. The term negative space is something of a misnomer. It emphasizes the idea that the viewer constructs his or her own meaning from the image. Negative space is never blank. It is designed to support the foreground of the picture.
Value is defined as the relative lightness or darkness of a color. It is an important tool for the designer/artist, in the way that it defines form and creates spatial illusions. Contrast of value separates objects in space, while gradation of value suggests mass and contour of a contiguous surface.
As a basic principle of art (specifically of design), the definition of balance refers to the ways in which the elements (lines, shapes, colors, textures, etc.) of a piece are arranged. Balance is one of those useful terms to know, if one is to employ Art Speak.
Unity and Variety
Unity occurs when all of the elements of a piece combine to make a balanced, harmonious, complete whole. Unity is another of those hard-to-describe art terms but, when it's present, your eye and brain are pleased to see it.
Harmony in visual design means all parts of the visual image relate to and complement each other. Harmony pulls the pieces of a visual image together. Harmony can be achieved through repetition and rhythm. Repetition reemphasizes visual units, connecting parts and creating an area of attention.
Pattern is an underlying structure that organizes surfaces or structures in a consistent, regular manner. Pattern can be described as a repeating unit of shape or form, but it can also be thought of as the "skeleton" that organizes the parts of a composition.
Scale is most often used in architectural sketches, paintings, drawings and other artistic mediums. Artists create scales for drawings to correctly show the size relationship between objects. For example, an artist may decide that 1 inch is equivalent to 10 feet. Establishing this scale will guide the artist in creating every objects with respect to this scale in order to avoid objects from appearing too tall or too short. In many fields, there are standards for scale. For example, in architecture, a one-quarter-inch scale means that one-quarter inch is equal to 1 foot.
Proportion refers to how one part of an object relates to whole object in size, such as the size of an arm in relation to the rest of the body. It is similar to scale. Scale refers to how one object relates to another in size, such as how a person relates to a house. In art, objects can be scaled up or down in size, although most often down, in size to emphasize a particular aspect. Making things out of proportion can be used to emphasize a particular part of an object.