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== Theory ==
Diagonals, the middle [[perpendiculars]], the [[Centre (geometry)|center]] and the corners of a square are said to comprise the force lines in a square, and are regarded by some as more powerful than other parts in a square.<ref>Arnheim, R. (1954). Art and visual perception: A psychology of the creative eye. Los Angeles: University of California Press.</ref>▼
According to the DM, details that are of interest (to the artist and the viewer) are placed on one or more diagonals of 45 [[Degree (angle)|degrees]] from the four corners of the image. Contrary to other rules of thumb involving composition, such as the rule of thirds and the golden ratio, the DM is not ascribing value to the [[Line-line intersection|intersections]] of its lines. Rather, a detail of interest can be located on any point of the four bisections, to which the viewer’s attention will be drawn.<ref>Westhoff, E. (2009). De diagonaal-methode. (The Diagonal Method.) Zoom.nl Digitale Fotografie & Video, 2009(10), 82-87.</ref> However, the DM is very strict about placing details exactly ''on'' the bisection, allowing for a maximum deviation of one millimeter on an A4-sized picture. Another difference with other rules of thumb is that the DM is not being used for improving a composition.
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The DM can only be applied on images where certain details are supposed to be emphasized or exaggerated, such as a [[portrait]] in which a specific body part deserves extra attention by the viewer, or a photograph for advertising a [[Product (business)|product]]. Photographs of [[landscapes]] and [[architecture]] usually rely on the composition as a whole, or have lines other than the bisections to determine the composition, such as the horizon.<ref>Elzenga, J. W. (2009). Digitale fotografie natuur: Tips en technieken voor het fotograferen van landschap en dieren. (Digital photography in nature: Tips and techniques for photographing landscapes and animals.) Amsterdam: Pearson Education. P. 49.</ref> Only if the picture includes details such as persons, (standalone) trees, or [[buildings]] is the DM applicable.
▲Diagonals, the middle [[perpendiculars]], the [[Centre (geometry)|center]] and the corners of a square are said to comprise the force lines in a square, and are regarded by some as more powerful than other parts in a square.<ref>Arnheim, R. (1954). Art and visual perception: A psychology of the creative eye. Los Angeles: University of California Press.</ref>
== References ==
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