This Discipline LDD is intended for metadata specific to Commercial Off The Shelf (COTS) cameras. It will often contain EXIF-type keywords specific to a given camera model. The intent is to hold metadata that does not fit elsewhere. For example, if the IMG LDD has a place to store the metadata, it should generally be used in preference to this LDD. ## CHANGE LOG ## 1.0.0.0 - Initial implementation with Nikon support considerations The Autofocus class contains attributes uses to identify or describe the algorithm and settings used to automatically focus the lens. This Discipline LDD is intended for metadata specific to Commercial Off The Shelf (COTS) cameras. It will often contain EXIF-type keywords specific to a given camera model. The intent is to hold metadata that does not fit elsewhere. For example, if the IMG LDD has a place to store the metadata, it should generally be used in preference to this LDD. This class contains the orientation of the camera derived from its internal sensors. These are usually from tilt sensors in the camera. Note that in non-terrestrial environments these values may be of limited use. For example, tilt sensors are of no use in microgravity, and while they might work on the Moon, yaw generally has to be determined by GPS which is unavailable there. These values are not in the Geometry LDD because of the difficulty of precisely defining the reference coordinate system. The Camera_Properties contains parameters describing various physical properties of the camera The Camera_Settings class contains parameters describing shooting mode, processing, and image correction controls. The Exposure class contains attributes identifying camera exposure configuration. This includes single shot, exposure bracketing, and burst mode operations. The File_Information class describes attributes pertaining to the image file location on disk storage and unique sequence identifier The Lens_Properties class contains attributes describing the physical properties, identification, and capabilities of the lens in use when the shot was taken. This section contains the simpleTypes that provide more constraints than those at the base data type level. The simpleTypes defined here build on the base data types. This is another component of the common dictionary and therefore falls within the common namespace. The size of the lens opening, or aperture value, which controls the amount of light entering the camera during autofocusing. Specifies the height of the autofocus box when the picture was taken Specifies the initial height in pixels of the square autofocus box. Specifies the initial width in pixels of the square autofocus box. Specifies the X (horizontal) coordinate of the starting point of the dynamic autofocus area. Specifies the Y (vertical) coordinate of the starting point of the dynamic autofocus area. Refers to the autofocus mode selected for focusing. Includes Single Point, Dynamic Area, and/or Auto Area AF. Mode availability depends on the capabilities of a specific camera model. Specifies the width of the autofocus box when the picture was taken Specifies the X (horizontal) coordinate of the dynamic autofocus area. Specifies the Y (vertical) coordinate of the dynamic autofocus area. Indicates whether the camera will prioritize achieving focus or shot capture while in continuous autofocus mode and if the subject cannot be quickly locked on. Focus Priority will only capture a photograph once the subject has been properly focused. Release Priority will take a shot regardless of whether or not focus has been achieved. Indicates whether or not autofocus coordinates are available. Refers to the method the autofocus system uses to detect focus. This can include methods such as Contrast Detection or Phase Detection, depending on the capabilities of the camera model. Details, typically expressed in micro-adjustments (e.g., +5 or -10), on any calibration made to the autofocus system to improve accuracy. Height of the image sensor, used in autofocus calculations Width of the image sensor, used in autofocus calculations Indicates the version number of the camera's autofocus information. Refers to the intensity of the indicator that shows which focus point(s) are selected. Indicates how many of the selected autofocus points achieved focus on the subject. Indicates how many autofocus points where actively engaged during the shot. Indicates whether the camera prioritizes on achieving a sharp focus before allowing the shutter to release in single autofocus mode. Focus Priority will only release the shutter once it has achieved focus on the subject. Release Priority will allow the shutter to be released even if focus has not been achieved. Refers to the specific mode used for exposure bracketing, often expressed in terms of settings. Could include modes like Exposure, Flash, or White Balance bracketing. Denotes the order in which bracketed images are taken, such as whether they are taken from underexposed to overexposed, or vice versa. Describes the camera's autofocus behaviour when shooting in burst mode. This indicates whether focus is locked for the entire burst or adjusted between shots. Records the specific type of bracketing enabled in the camera Measures the overall lightness or darkness of the image as captured A number assigned to all expsoures in a burst group within a single press of the shutter. The name including model number of the camera. This should be sufficiently precise that someone could go purchase a similar camera (assuming they're still being sold). Specifies the camera vendor, make, or manufacturer. Defines the portion of the frame that the camera evaluates for exposure in Center-Weighted metering mode. This is typically expressed as a percentage. Continuous Low mode shooting speed indicates the frame rate at which the camera captures image in continuous low mode. Usually expressed in frames per second (fps). Indicates the setting adjustment of the midtone contrast of an image. This adjustment affects the perceived sharpness and detail, specially the midtones, enhancing the overall texture without significantly altering highlights and shadows. Indicates the version of the color balance adjustments or algorithms applied to the image. Reflects the difference in brightness between the darkest and lightest parts of the image. Numeric identifier representing the custom settings bank in use (e.g. Bank 1, Bank 2). The Custom Settings Bank allows users to store and select customized camera settings for specific shooting scenarios. Applies sharpening to mitigate the softening effects of diffraction at small apertures Designates the folder or directory within the memory card that contains the file Indicates whether distortion correction is applied Indicates whether the +/- button was needed to set exposure compensation with the main command dial Indicates the largest aperture (in terms of light-gathering ability) used during the exposure, which may differ from the physical maximum aperture due to verious settings or conditions. This is expressed as an f-stop (e.g., f/4.0). Indicates the location of the exit pupil relative to the camera body or lens mount. This is typically measured in millimeters, affecting how light enters the camera. Indicates the amount by which exposure is varied in a series of bracketed shots. Represented in stops (e.g., +/- 1.0) Exposure compensation is a setting that allows the photographer to adjust the standard exposure determined by the camera's metering system. The exposure compensation step size defines the increments used when moving the compensation value up (overexposure) or down (underexposure). Exposure correction increment per click of the dial when adjusting camera settings such as aperture, shutter speed, or exposure compensation increments. Indicates wether an exposure delay was employed prior to releasing the shutter. Records how much the exposure deviates from the camera's metered exposure. Often expressed in stops (e.g., +1.0 or -0.5) Indicates the version of the metadata structure of the file itself. Refers to the unique identifier assigned to the image file, typically a sequential number. Indicates the version of the flash-related metadata recorded. Specifies the specific settings for the flash during the exposure, such as Normal or Red-Eye Reduction. Refers to a feature that helps reduce the effects of flickering light sources, such as flourescent or LED lights, which can cause banding or unwanted color shifts in images. Flicker reduction aims to synchronize the camera's shutter speed with the frequency of flickering lights, minimizing artifacts and ensuring more consistent exposure and color balance. Indicates whether flicker reduction was used during the exposure, expressed as On or Off. Describes the arragements or pattern of selected autofocus points. Indicates whether focus points wrap around when reaching the edge of the selection grid. Typically On or Off. Indicates whether autofocus thinks the image is in focus or not Automates focus stacking by capturing a sequence of images at incrementally changing focus distances High-Speed Frame Capture mode Indicates the method used in applying High ISO Noise Reduction. A numeric scale or percentage of adjustment to the overall color tint of the image. Specifies the maximum ISO sensitivity that the camera will automatically adjust to when in Auto ISO mode. Indicates the maximum shutter speed that the camera will use when set to Auto ISO mode. This defines the slowest shutter speed at which the camera will operate to avoid motion blur when increasing ISO sensitivity. Indicates the increments made in changes to ISO sensitivity. Signifies the version of the lens information records which may include updates specifications or characteristics Refers to the maximum and minimum aperture settings available on the lens. This is expressed in f-stop values (e.g., f/2.8 to f/22) Indicates a unique numeric identifier corresponding to the lens model used for the image capture. Indicates the type of lens mount Identifies the generation and techology of the attached lens, expressed as a numerical value which can be correlated to identifiers using specialized metadata types such as ExifTool. Indicates the widest aperture setting when the lens is at its maximum focal length, expressed as an f-stop (e.g., f/4.0) Indicates the widest aperture setting when the lens is at its minimum focal length, expressed as an f-stop (e.g., f/4.0) Specifies the maximum number of shots the camera can take in a continuous shooting burst. Indicates the longest distance, in millimeters, that the lens can focus on. Represents the version of the microcontroller unit (MCU) firmware in the camera body that processes the images. Indicates the specific memory card in the camera where the image was saved, particaraly in cameras with more than one card slots. Denotes the shortest distance, in millimeters, that the lens can focus on while still producing a sharp image. Indicates whether automatic gain control was applied to balance exposure across multiple exposures, typically On or Off. Indicates which multiple exposure mode was used. Series takes a series of multiple exposures per shot resulting in multiple files. Single Photo will create only a single combined image. Indicates how multiple shots are blended into a single final image Denotes the number of exposures combined into a single image. Indicates the version of the multi-exposure settings used in the camera. Refers to whether the camera applied noise reduction algorithms to high-ISO images. Typically shown as On or Off. Indicates how many autofocus points are available to the camera. Time zone offset for the general file modification date/time. Note that time zones may not be defined for space missions (generally UTC is used), but the camera may be set for some time zone. Time zone offset corresponding to the moment the digital file was created. Note that time zones may not be defined for space missions (generally UTC is used), but the camera may be set for some time zone. Time zone offset corresponding to the moment the photo was actually taken. Note that time zones may not be defined for space missions (generally UTC is used), but the camera may be set for some time zone. The pitch angle of the camera body, generally perpendicular to the lens axis. Indicates the trustworthiness of the pitch measurement. Possible values include "Fine", "Coarse", "Unusable". Note that unusable values may be simply omitted. Specifies which autofocus point was primary when autofocusing. Typically expressed as an X, Y coordinate or numerical identifier of the autofocus point in use. First coefficient (A) of a polynomial warp algorithm, similar to Brown's distortion model. Calculates the corrected radius (r') as a function of distortied radius from the center of the image (r) and the coefficients A,B,C via: r' = Ar^3 + Br^2 + Cr Second coefficient (B) of a polynomial warp algorithm, similar to Brown's distortion model. Calculates the corrected radius (r') as a function of distortied radius from the center of the image (r) and the coefficients A,B,C via: r' = Ar^3 + Br^2 + Cr Third coefficient (C) of a polynomial warp algorithm, similar to Brown's distortion model. Calculates the corrected radius (r') as a function of distortied radius from the center of the image (r) and the coefficients A,B,C via: r' = Ar^3 + Br^2 + Cr Specifies the coordinates of the center of the raw image as captired by the sensor TODO The roll angle of the camera body, generally about the lens axis. Indicates the trustworthiness of the roll measurement. Possible values include "Fine", "Coarse", "Unusable". Note that unusable values may be simply omitted. A numeric scale or percentage of intensity of colors in the image. Refers to the clarity and detail in the image expressed in a numerical scale (e.g., 0 to 100) Indicates the camera mode at the time of capture, affecting settings like focus and exposure. Includes Single Shot, Continuous, or Timer, depending on the capabilities of the camera. Indicates the version of detailed shooting parameters used for parsing specific camera settings. Indicates the number of times the camera's shutter has been actuated since it's first use. Indicates shutter mode (for example, mechanical vs. electronic) Specifies the method used for vibration reduction stabilization. This includes mechanisms such as lens-based (VR/Optical), in-body (IBIS), and synchro VR. First coefficient for vignette correction polynomial. Second coefficient for vignette correction polynomial. Third coefficient for vignette correction polynomial. Indicates whether the camera applied any correction for vignetting (brightness fall-off around corners). The yaw angle of the camera body, generally about the vertical axis at the camera location. Indicates the trustworthiness of the yaw measurement. Possible values include "Fine", "Coarse", "Unusable". Note that unusable values may be simply omitted.