Difference between revisions of "Glossary"

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Please add the entry alphabetically to the list.
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<!-- Please don't add entries here. Instead use the Glossary template on the respective page. For Details please see [[Category:Glossary]] -->
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{{GlossaryParagraph|A}}
== A ==
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{{GlossaryParagraph|B}}
'''[[Aliasing]]''' - less than optimal resampling that causes "jaggies" and Moire effects.
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{{GlossaryParagraph|C}}
 
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{{GlossaryParagraph|D}}
'''[[Alpha channel]]''' - an image channel containing a mask or selection.
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{{GlossaryParagraph|E}}
 
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{{GlossaryParagraph|F}}
'''[[Field_of_View|Angle of View]]''' The angle in degrees that a projection covers.
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{{GlossaryParagraph|G}}
 
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{{GlossaryParagraph|H}}
'''[[Aspect Ratio]]''' - the ratio (proportion) between height and width of an image.
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{{GlossaryParagraph|I}}
 
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{{GlossaryParagraph|J}}
== B ==
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{{GlossaryParagraph|K}}
 
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{{GlossaryParagraph|L}}
'''[[Banding]]''' Visible steps in smooth gradients.
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{{GlossaryParagraph|M}}
 
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{{GlossaryParagraph|N}}
'''[[Barrel distortion]]''' A distortion produced by the lens itself which causes straight lines to be bent outwards.
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{{GlossaryParagraph|O}}
 
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{{GlossaryParagraph|P}}
== C ==
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{{GlossaryParagraph|Q}}
'''[[CCD]]''' A type of image sensor used in digital cameras.
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{{GlossaryParagraph|R}}
 
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{{GlossaryParagraph|S}}
'''[[Chromatic aberration]]''' A type of lens error generating colored fringes.
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{{GlossaryParagraph|T}}
 
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{{GlossaryParagraph|U}}
'''[[Contrast Blending]]''' A technique to blend several exposure bracketed images in one image
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{{GlossaryParagraph|V}}
 
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{{GlossaryParagraph|W}}
'''[[Control points]]''' are used to identify matching features in adjacent images.
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{{GlossaryParagraph|X}}
 
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{{GlossaryParagraph|Y}}
'''[[Cropped TIFF]]''' TIFF flavor where the image canvas includes a smaller image at an offset within the larger area.
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{{GlossaryParagraph|Z}}
 
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'''[[Cubic Projection]]''' A subcase of the [[Rectilinear Projection]] used as the input source projection for some fully spherical panorama viewers.
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'''[[Cylindrical panorama]]''' A panoramic image in [[Cylindrical Projection]]
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'''[[Cylindrical Projection]]'''  A projection capable of mapping 360 degrees horizontally by roughly 120 degrees vertically with acceptable distortion.
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== D ==
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'''[[Depth of Field]]''' The distance in front of and behind the focus distance where the image blur is not recognizable.
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'''[[DPI]]''' Dots Per Inch - Pixel density when printing images.
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'''[[DSLR spherical resolution]]''' What [[spherical]] panorama resolution can I obtain from a certain [[fisheyes|fisheye]]/camera combination.
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'''[[Dynamic range]]''' The ratio in brightness of the brightest highlight to the darkest shadow that are accurately captured in a scene.
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== E ==
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'''[[Entrance pupil]]''' The special point that you have to rotate your camera around, to avoid parallax errors.  Commonly referred to as the [[Nodal Point]] or better [[no-parallax point]], which see for more information.
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'''[[Equirectangular Projection]]''' A projection capable of mapping the entire sphere to a rectangle with 2:1 aspect ratio.
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'''[[EXIF]]''' Exchangeable Image File Format.  EXIF data allows camera, lens, exposure information, image description, copyright, etc. to be embedded in an image file.
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== F ==
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'''[[Field of View]]''' The angle in degrees that a projection covers.
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'''[[Fisheye Projection]]''' A projection where the distance from the centre of the image to a point is proportional to the equivalent spatial angle.
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'''[[FJPG]]''' is a [[JPEG]] flavor that supports display of high [[dynamic range]] images for [[PTViewer]] 3.x introduced by [[Helmut Dersch]].
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'''[[Focal Length]]''' the physical property of a lens which together with the sensor size determines the [[Field of View]]
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== G ==
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'''[[Gamma]]''' The relation between pixel values and visible brightness.
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'''[[GIF]]''' Graphics Interchange Format. An [[Image format]] introduced by compuserve.
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== H ==
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'''[[Halo]]''' Bright or dark areas along hard contrast edges introduced by certain image manipulations.
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'''[[HDR]]''' High [[dynamic range|Dynamic Range]]
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'''[[HDR compression]]''' The compression of the [[dynamic range|Dynamic Range]] in order to be displayed on a low dynamic range device like monitor or printer.
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'''[[Depth of Field#Hyperfocal_distance|Hyperfocal distance]]''' The distance on which you have to focus your lens if you want the [[Depth of Field]] to stretch to infinity.
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== I ==
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'''[[Interpolation]]''' A mathematical way to estimate a value in beetween two values. In image processing: The pixel color and brightness in between two pixels.
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== J ==
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'''[[JAR]]''' A file format for distributing [[Java]] software
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'''[[Java]]''' A programming language, program execution environment and executable program format
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'''[[JPEG]]''' Joint Photographic Experts Group widely used [[Image format]]
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== K ==
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== L ==
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'''[[Landscape]]''' Image orientation with the longer side in horizontal direction.
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'''[[Lens correction model]]''' A mathematical model that allows the correction of some [[Lens distortion|lens distortions]]
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'''[[Lens distortion]]''' A distortion produced by the lens itself which causes straight lines to be bent in some way.
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== M ==
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== N ==
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'''[[Nadir]]''' The point directly below
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'''[[No-parallax point]]''' Better name for 'Nodal Point' (see below).
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'''[[Nodal Point]]''' The special point that you have to rotate your camera around, to avoid [[parallax]] errors.  Also called "entrance pupil".  Click the term for more info.
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== O ==
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'''[[Object Movie]]''' "Inverted panorama" where you can move around an object.
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'''[[Optical axis]]''' The center longitudinal axis of an optical system.
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== P ==
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'''[[Panorama]]''' An image of a very wide or even surround scene or with a typical [[Aspect Ratio]]
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'''[[Parallax]]''' Foreground shift in two images shot from the same scene but from different points
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'''[[Philosphere]]''' A way to map a spherical panorama on the outside of an approximated sphere invented by [http://www.philohome.com/ Philo]
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'''[[Perspective distortion]]''' Image distortion caused by the fact that a 3-dimensional world is mapped to a 2-dimensional image.
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'''[[Pincushion distortion]]''' A [[lens distortion]] which causes straight lines outside the image center to be bent inwards (like a pincushion).
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'''[[Pitch]]''' Angle up-and-down (above and below horizon).  See also "[[Roll]]" and "[[Yaw]]".
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'''[[PNG]]''' Portable Network Graphics [[Image format]]
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'''[[Portrait]]''' Image orientation with the longer side in vertical direction.
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'''[[Projections]]''' Different possibilities to get a two-dimensional image of the three-dimensional world around us.
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'''[[PSD]]''' Photoshop Document format. A proprietary [[Image format]] used by Adobe [[Photoshop]]
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'''[[PTblender]]''' A command-line tool that implements just the colour and brightness correction
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functionality of [[PTmender]] (a replacement for [[PTStitcher]]).
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'''[[PTmender]]''' An Open Source replacement for [[Helmut Dersch]]'s [[PTStitcher]]
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'''[[PTOptimizer]]''' Panorama tools image position and correction parameters optimizer. Script driven.
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'''[[PTStitcher]]''' Main panorama tools stitcher application. Script driven.
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'''[[PTV]]''' PTViewer [[Image format]], supported by [[PTViewer]] version 2.8 from [[Fulvio Senore]]
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== Q ==
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'''[[Quicktime]]''' Apples multimedia technologie.
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'''[[QTVR]]''' '''QuickTime Virtual Reality''' A subset of the functionality of Apple [[Quicktime]]
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== R ==
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'''[[RAW]]''' A group of some hundred proprietary [[image format|image formats]] containg unprocessed sensor data from digital cameras.
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'''[[Rectilinear Projection]]'''  A projection in which every straight line in the world stays straight in the image.
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'''[[Reflection mapping]]''' Simulating a complex mirroring surface by means of a ([[spherical]]) panorama.
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'''[[Roll]]'''  Rotation angle around the lens axis.  See also "[[Pitch]]" and "[[Yaw]]".
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== S ==
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'''[[Spherical]]''' is a panorama  format that can contain the whole sphere around the viewer.
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'''[[DSLR spherical resolution|Spherical Resolution]]''' What resolution can I obtain from a certain fisheye/camera combination.
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== T ==
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'''[[TIFF]]''' Tagged Image File Format. A widely used [[Image format]] for storage and exchange of image files.
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'''[[Tone mapping]]''' Technique for reproducing the appearance of images having a higher [[dynamic range]] than the reproducing media (e.g. prints or standard monitors).
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== U ==
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== V ==
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'''[[Vignetting]]''' Light fall-off in the corners of images
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== W ==
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'''[[Wavy distortion]]''' A distortion produced by the lens itself which causes straight lines to be bent in waves.
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== X ==
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== Y ==
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'''[[Yaw]]'''  Panning angle, left-and-right.  See also "[[Pitch]]" and "[[Roll]]".
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== Z ==
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'''[[Zenith]]''' The point directly above.
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== 0 - 9 ==
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== others ==
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[[Category:Glossary]]
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Revision as of 21:01, 18 November 2007


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