ImageMD Extension Schema ImageMD contains technical metadata that describe a digital image. ImageMD: The ImageMD schema has the following top-level elements: 1. format: information about the segmentation (tile/strip) and orientation of the image; 2. spatial_metrics: information about the digital dimensions of the image; and 3. energetics: information about the pixel characteristics e.g. chromaticities, color map, response curve, etc.... ImageMDType: Complex Type for encapsulating within a single parent element the individual technical metadata elements that describe an image or portion of an image. But note that the top-level technical metadata elements that comprise the ImageMD schema can be used directly under a METS mdSec.dmWrap element. The individual elements are documented under their corresponding types. ImageMDType has a single attribute, ID (XML ID). formatType: The formatType complex type contains technical metadata about the format of an image. It has the following elements: 1. segment: information about the segmentation of the image; 2. planar_configuration: designates how the components of each pixel are stored; 3. orientation: information about the orientation of the image on disk and display. segmentType: Complex Type for recording information about image segments of an item or portion of an item. segmentType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - segment_form: specifies whether the image is stored in tiles or strips; - strip_offsets: the byte offset of a strip; - strip_rows: the number of rows per strip; - strip_byte_counts: the number of image data bytes stored within each strip after compression; - tile_width: the tile width in pixels; - tile_height: the tile height in pixels; - tile_offsets: the byte offset of a tile; - tile_byte_counts: the number of image data bytes stored within each tile after compression. planar_configurationType: Complex Type for recording how the components of a pixel in an item or portion of an item are stored. planar_configurationType has a single attribute, ID (XML ID). orientationType: Complex Type for recording orientation information about an item or portion of an item. orientationType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - orientation_disk: orientation of the image on disk; - orientation_display: orientation of the image on display. spatial_metricsType: The spatial_metricsType complex type provides technical metadata about the spatial metrics of an image. It has the following elements: 1. dimensions: information about the dimensions of the image in pixels; 2. sampling_frequency: information about the sampling frequency of the image; dimensionsType: Complex Type for recording pixel dimension information about an item or portion of an item. dimensionsType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - pixels_horizontal: the width of the image in pixels; - pixels_vertical: the height of the image in pixels; sampling_frequencyType: Complex Type for recording sampling frequency information about an item or portion of an item. sampling_frequencyType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - sampling_frequency_horizontal: the number of pixels per sampling frequency unit by width; - sampling_frequency_vertical: the number of pixels per sampling frequency unit by height; - sampling_frequency_unit: the unit of measure for horizontal and vertical sampling frequency; - sampling_frequency_plane: the reference plane location for horizontal and vertical sampling frequency. energeticsType: The energetics complex type provides technical metadata about the pixel characteristics of an image. It has the following attributes: 1. sample: information about sample and pixel size; 4. color_map: information about the red-green-blue color map (color lookup table); 5. gray_response: information about the gray response curve; 8. chromaticities: information about chromaticities. sampleType: Complex Type for recording sample sizing information for an item or portion of an item. sampleType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - bits_per_sample: the number of bits per component for each pixel; - samples_per_pixel: the number of color components per pixel; - extra_samples: specifies that each pixel has extra components i.e. Yes or No. color_mapType: Complex Type for recording color map information for an item or portion of an item. color_mapType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - color_map_location: the location of the color map i.e. Image File, Auxiliary File, Associated File, Embedded Text; - color_map_value: the color map embedded in schema as text. gray_responseType: Complex Type for recording gray response information for an item or portion of an item. gray_responseType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - gray_response_location: the location of the gray response curve i.e. Image File, Aux File, Associated File, Metadata; - gray_response_value: the optical density of each possible pixel value embedded in schema as text; - gray_response_unit: the unit of measure for the gray_response_curve. chromaticitiesType: Complex Type for recording chromaticities information for an item or portion of an item. chromaticitiesType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of metadata contained in the element. - chromaticities_white_point: the white point chromaticity of the effective illumination source; - chromaticities_primary: the chromaticities of the primary colors of the image;