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IIPTC

ITPC stands for the International Press Telecommunications Council. The ITPC came up with the Information Interchange Model or IIM file structure and metadata attributes that can be applied to images as well as text and other types of media files. It is almost universally accepted by photographers as the standard format for embedding metadata into an image file. Such embedded metadata could include the photographer's name, copyright information, or other descriptions. Almost all of the IIM attributes are supported by EXIF. ITPC data is found in the ITPC Header and is compatible with JPEG and TIFF files. In recent years, XMP (Extensible Metadata Platform) has taken over as the defacto standard format for embedding this data in an image file. 
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i-TTL Flash Control
Nikon's i-TTL (intelligent through-the-lens) flash system meters every exposure, setting the Nikon Speedlight's output to the precise level needed to balance the scene's ambient light. Find out more.
Image Authentication Software
Verify JPEG, TIFF and NEF (RAW) data taken using a compatible Nikon digital SLR. This secure software checks if an image has been processed or edited after capture.
Image Browser
An application that enables you to view digital photos. Some browsers also allow you to rename files, convert photos from one file format to another and add text descriptions.
iPhone App.
An application that works on the Apple Inc. iPhone, iPod Touch and iPad. The Nikon Learn & Explore app is free, and can be downloaded from the Apple App store. Find out more.
Infrared Film
Specially sensitized film that detects invisible infrared rays.
IPTC
ITPC stands for the International Press Telecommunications Council. Find out more.
IPTC Presets
In select Nikon D-SLR cameras, IPTC presets can be imported into the camera before shooting, so as images are saved, the IPTC data is written to them, saving editors and photographers a great deal of time doing this in post-production. Find out more.
In-Camera HDR
Select Nikon cameras have an in-camera HDR (High Dynamic Range) mode, in which the camera automatically combines two exposures to form a single image that captures a wide range of tones, from shadows to highlights. Find out more.
Incandescent
Incandescent light refers to the illumination produced from typical household light bulbs. Find out more.
Infrared Compensation Index
In infrared photography with most lenses, the plane of sharpest focus is slightly farther away than that in visible-light photography.
Infrared Photography
Refers to taking pictures in light beyond the visible spectrum.
Intervalometer
A timing device that is used to trigger the camera's shutter at pre-determined intervals. It is used in time lapse photography. It is also known as an interval timer.
Image Overlay
Image overlay combines two existing NEF (RAW) photos to create a single picture that is then saved as a separate file. Find out more.
Image Sharpening
A function that controls the sharpness of outlines in photographs.
Image Resolution
The number of pixels in a digital photo is commonly referred to as its image resolution.
ISO
Acronym for International Organization for Standardization. Refers to the international standard for representing the sensitivity to light of an imaging sensor or film by a numerical value.
Inverse Square Law
This law of physics indicates that when you increase the distance between a subject to twice as far away from a light source, it will then receive one quarter of the light. Find out more.
Incident-Light Exposure Meter
A type of hand-held meter that measures the light falling on a subject. Not affected by a subject’s reflective properties, it should be positioned near the subject.
I-frames
One of the three types of compressed frames used by the MPEG format. Find out more.
Inkjet
A printer that places ink on the paper by spraying droplets through tiny nozzles.
i-TTL Balanced Fill Flash
Nikon's i-TTL (intelligent through-the-lens) Balanced Fill-Flash automatically balances the output of the Nikon Speedlight and the scene's ambient light. Find out more.
Image Editor
A computer program that enables you to adjust a photo to improve or change its appearance.
Interpolation
The process whereby an image-editing program adds supplemental pixels that are created from the image's existing, neighboring pixels, in effect creating a file with more image data and thus producing better image output.
ISO Control
Selected Nikon D-SLRs offer auto ISO control, a feature that will maintain a selected shutter speed range. Find out more.
Indices/Index Marking
Index markers are used in editing. Select Nikon D-SLR cameras can place markers in the digital video file in-camera. Find out more.
Image Size
The dimensions of an image in pixels. Sometimes stated using abbreviations such as “L” (large), “M” (medium), or “S” (small).
IF Lens
A NIKKOR lens in which only the internal lens group shifts during focusing. These lenses will be designated with the abbreviation IF on the lens barrel. Find out more.