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Miniature faking, also known as diorama effect or diorama illusion, is a process in which a
photograph A photograph (also known as a photo, image, or picture) is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor, such as a CCD or a CMOS chip. Most photographs are now created ...
of a life-size location or object is made to look like a photograph of a miniature
scale model A scale model is a physical model which is geometrically similar to an object (known as the prototype). Scale models are generally smaller than large prototypes such as vehicles, buildings, or people; but may be larger than small prototypes ...
. Blurring parts of the photo simulates the shallow
depth of field The depth of field (DOF) is the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image captured with a camera. Factors affecting depth of field For cameras that can only focus on one object dis ...
normally encountered in close-up photography, making the scene seem much smaller than it actually is; the blurring can be done either optically when the photograph is taken, or by digital postprocessing. Many
diorama A diorama is a replica of a scene, typically a three-dimensional full-size or miniature model, sometimes enclosed in a glass showcase for a museum. Dioramas are often built by hobbyists as part of related hobbies such as military vehicle mode ...
effect photographs are taken from a high angle to simulate the effect of looking down on a miniature. Tilt–shift photography is also associated with miniature faking. For video sequences, a way of strengthening the miniature impression is to run the video at higher speed than it was recorded. This appears to reduce the inertia which would normally limit the motion of large objects.


Some general characteristics of images

In a typical scene, objects close to the camera are at the bottom of the image, and objects far from the camera are at the top. This is less true if the image includes significant height as well as depth; a tall object near the camera can extend the height of the entire image. Only one plane can be in precise focus. Objects not in the plane of focus are blurred; the blurring increases with distance from the plane of focus. But blurring less than a certain amount is imperceptible under normal viewing conditions; objects for which blurring is imperceptible are within the ''depth of field'' (DoF). DoF decreases as magnification increases; in a close-up photograph of a miniature scene, the DoF is limited, and it often is impossible to have everything appear sharp even at the lens's smallest aperture. Consequently, the foreground and background are often blurred, with the blur increasing with distance above or below the center of the image. In a photograph of a full-size scene, the DoF is considerably greater; in some cases, it is difficult to have much of the scene ''outside'' the DoF, even at the lens's maximum aperture. Thus a difference in DoF is one characteristic by which a photograph of a full-size scene is readily distinguished from one of a miniature model. In typical photographs, there are no optical cues that specify the distance to objects (how far they are from the observation point) and so distance has to be inferred from the size of familiar objects in the scene. DoF blurring is a visual cue to distance. In a diorama illusion, the introduction of the blur cue appears to override this familiar information causing objects to appear miniature and toy-like.


Techniques

A common technique for making an image of a full-size scene resemble an image of a miniature model is to have the image progressively blurred from the center to the top or bottom, simulating the blurring due to the limited DoF of a typical image of a miniature. The blurring can be accomplished either optically or with digital postprocessing.


Optical

Miniatures can be simulated optically by using lens tilt, although the effect is somewhat different from the shallow
depth of field The depth of field (DOF) is the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image captured with a camera. Factors affecting depth of field For cameras that can only focus on one object dis ...
(DoF) that normally results from
macro photography Macro photography (or photomacrography or macrography, and sometimes macrophotography) is extreme close-up photography, usually of very small subjects and living organisms like insects, in which the size of the subject in the photograph is grea ...
. In a normal photograph (i.e. one not using tilt): * The DoF extends between two parallel planes on either side of the plane of focus; the DoF is finite in depth but infinite in height and width. * The sharpness gradients on each side of the DoF are along the line of sight. * Objects at the same distance from the camera are rendered equally sharp. * Objects at significantly different distances from the camera are rendered with unequal sharpness. In a photograph using tilt: * The DoF extends between two planes on either side of the plane of focus that intersect at a point beneath the lens (see
Depth of field The depth of field (DOF) is the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image captured with a camera. Factors affecting depth of field For cameras that can only focus on one object dis ...
in the
Scheimpflug principle The Scheimpflug principle is a description of the geometric relationship between the orientation of the plane of focus, the lens plane, and the image plane of an optical system (such as a camera) when the lens plane is not parallel to the image ...
article for an illustration). * The DoF is wedge shaped, with the apex of the wedge near the camera, and the height of the wedge increasing with distance from the camera. * When the plane of focus is at a substantial angle to the image plane, the DoF can be small in height but infinite in width and depth. * The sharpness gradients are at an angle to the line of sight. When the plane of focus is almost perpendicular to the image plane, the sharpness gradients are almost perpendicular to the line of sight. * When the plane of focus is at a substantial angle to the image plane, objects at the same distance from the camera are rendered with unequal sharpness, depending on their positions in the scene. * Objects at greatly different distances from the camera are rendered sharp if they are within the DoF wedge. Despite the differences, for a scene that includes relatively little height, lens tilt can produce a result similar to that of a miniature scene, especially if the image is taken from above at a moderate angle to the ground. For a completely flat surface, the effect using tilt would be almost the same as that with a regular lens: the region of focus would be sharp, with progressive blurring toward the top or bottom of the image. The image of Jodhpur was made from such a scene; although the blurring was accomplished with digital postprocessing, a similar result could have been obtained using tilt. Diorama effect using tilt is less effective if a scene includes objects of significant height, such as tall buildings or trees, especially when photographed at a small angle to the ground, because there is a sharpness gradient along surfaces that are obviously the same distance from the camera. Though probably less common, similar difficulties arise if an object has significant extent along the line of sight, such as a long train receding from view, again photographed at a small angle to the ground, because parts of the train that are obviously at considerably different distances from the camera are rendered equally sharp. With a
view camera A view camera is a large-format camera in which the lens forms an inverted image on a ground-glass screen directly at the film plane. The image is viewed and then the glass screen is replaced with the film, and thus the film is exposed to exac ...
, tilt can usually be set with
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built into the camera; with a small- or medium-format camera, a tilt/shift lens or adapter is usually required.


Digital postprocessing

A miniature can also be simulated digitally, using an image editor to blur the top and bottom of the photograph, so that only the subject is sharp. With basic techniques, e.g., a tool such as
Adobe Adobe ( ; ) is a building material made from earth and organic materials. is Spanish for ''mudbrick''. In some English-speaking regions of Spanish heritage, such as the Southwestern United States, the term is used to refer to any kind of e ...
Photoshop Adobe Photoshop is a raster graphics editor developed and published by Adobe Inc. for Windows and macOS. It was originally created in 1988 by Thomas and John Knoll. Since then, the software has become the industry standard not only in raster ...
's Lens Blur filter, using sharpness
gradient In vector calculus, the gradient of a scalar-valued differentiable function of several variables is the vector field (or vector-valued function) \nabla f whose value at a point p is the "direction and rate of fastest increase". If the gradi ...
s extending from the middle of the image to the top and bottom, the effect is quite similar to that obtained using lens tilt. The simple techniques have limitations similar to those of lens tilt. In the image of Jodhpur, the diorama simulation is quite effective, because the scene includes relatively little height and was photographed at a fairly high angle to the ground. The simulation is less convincing in the image of the train and in the image of the large, low building, because these scenes include several tall objects and were photographed at fairly low angles to the ground. In the image of the train, there is significant sharpness variation from the bottom of the train to the top, and the same is true for many of the trees, even though the tops and bottoms of these objects are at nearly the same distances from the camera. Similar effects occur in the image of the large, low building; although the diorama simulation of the main subject is reasonable, there are noticeable sharpness differences from top to bottom on the nearest light poles and on the taller building in the background, even though the tops and bottoms of these objects are at nearly the same distances from the camera. More realistic simulation is possible using more advanced techniques. A simple ''
depth map In 3D computer graphics and computer vision, a depth map is an image or image channel that contains information relating to the distance of the surfaces of scene objects from a viewpoint. The term is related (and may be analogous) to ''depth bu ...
'' consisting of a linear gradient can be edited to give uniform sharpness to objects at the same distance from the camera. This effect cannot be achieved using lens tilt. Even simple digital techniques afford greater flexibility than optical techniques, including the ability to choose the region of sharpness and the amount of blur for the unsharp areas after the photograph has been taken. In addition, digital miniature faking does not require a camera with movements or a special (and usually very expensive) lens. Other techniques to enhance the impression of a diorama scene are increasing the contrast of the picture, simulating the darker, harder shadows of a miniature under a light, and increasing the
saturation Saturation, saturated, unsaturation or unsaturated may refer to: Chemistry * Saturation, a property of organic compounds referring to carbon-carbon bonds **Saturated and unsaturated compounds ** Degree of unsaturation **Saturated fat or fatty aci ...
of the picture to simulate the brighter colors of a painted miniature.


Digital techniques for motion pictures

An advanced use of the diorama effect in a motion picture was a process developed by Clark James, dubbed Smallgantics, for "
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", a music video for
Thom Yorke Thomas Edward Yorke (born 7 October 1968) is an English musician and the main vocalist and songwriter of the rock band Radiohead. A multi-instrumentalist, he mainly plays guitar and keyboards and is noted for his falsetto. He has been describe ...
of
Radiohead Radiohead are an English rock band formed in Abingdon, Oxfordshire, in 1985. The band consists of Thom Yorke (vocals, guitar, piano, keyboards); brothers Jonny Greenwood (lead guitar, keyboards, other instruments) and Colin Greenwood (bass); ...
. The project was produced at Bent Image Lab in July 2006 and directed by filmmaker Chel White. In this instance, the false diorama effect was achieved digitally using helicopter footage of full-size vernal and urban landscapes that was broken down into separate planes. It involves hand creating as many as eight planes of
z-buffering A depth buffer, also known as a z-buffer, is a type of data buffer used in computer graphics to represent depth information of objects in 3D space from a particular perspective. Depth buffers are an aid to rendering a scene to ensure that the ...
over live-action footage, one frame at a time, resulting in an animated black and white matte (filmmaking) sequence. These mattes are then blended together with varying degrees of blur to create the effect of shallow depth of field.


In popular culture

* ''
The Late Show with Stephen Colbert ''The Late Show with Stephen Colbert'' is an American late-night news News is information about current events. This may be provided through many different media: word of mouth, printing, postal systems, broadcasting, electronic commun ...
'' uses tilt-shift photography in its opening credits sequence.newyorker.com
/ref> * The 2019 remake of ''The Legend of Zelda: Link's Awakening'' for the
Nintendo Switch The is a hybrid video game console developed by Nintendo and released worldwide in most regions on March 3, 2017. The console itself is a tablet that can either be docked for use as a home console or used as a portable device, making it a ...
utilizes a tilt-shift graphical effect. * The opening credits of the TV show '' Superstore'' use a tilt-shift clip of the interior of the store setting. * The entire episode ''"Night of the Mini Dead"'' from the third volume of the
anthology series An anthology series is a radio, television, video game or film series that spans different genres and presents a different story and a different set of characters in each different episode, season, segment, or short. These usually have a diffe ...
''
Love, Death & Robots ''Love, Death & Robots'' (stylized as ''LOVE DEATH + R⬮BOTS'', and represented in emoji form as ❤️❌🤖) is an adult animated anthology streaming television series created by Tim Miller and streaming on Netflix. Produced by Blur Studio ...
'' uses this effect.


Notes


References

* Gogel, W. C. 1969. The effect of object familiarity on the perception of size and distance. ''Quarterly Journal of Experimental Psychology'', 21 * * Merklinger, Harold M. 1996. ''Focusing the View Camera''. Bedford, Nova Scotia: Seaboard Printing Limited.
Available for download
(PDF). * Ray, Sidney F. 2000. The geometry of image formation. In ''The Manual of Photography: Photographic and Digital Imaging'', 9th ed. Ed. Ralph E. Jacobson, Sidney F. Ray, Geoffrey G. Atteridge, and Norman R. Axford. Oxford: Focal Press. * {{Photography Photographic techniques