| # | Table Name | Field Name | Field Definition | Data Type | Enumerated Values |
| 1 | imagemd | bits_per_sample | Bit depth at each pixel, e.g., 8, 16, 24, etc. | Suggested Enumerated Type | NONE |
| 2 | imagemd | chromaticities_primary_blue_x | This specifies the Blue [x] value for the chromaticities of the primary colors of the imaging process. Note: These values specify the 1931 CIE xy chromaticities of the capture primaries. The ordering is red [x], red [y], green[x], green[y],blue[x],blue[y | SBCS(255) | NONE |
| 3 | imagemd | chromaticities_primary_blue_y | This specifies the Blue [y] value for the chromaticities of the primary colors of the imaging process. Note: These values specify the 1931 CIE xy chromaticities of the capture primaries. The ordering is red [x], red [y], green[x], green[y],blue[x],blue[y | SBCS(255) | NONE |
| 4 | imagemd | chromaticities_primary_green_x | This specifies the Green [x] value for the chromaticities of the primary colors of the imaging process. Note: These values specify the 1931 CIE xy chromaticities of the capture primaries. The ordering is red [x], red [y], green[x], green[y],blue[x],blue[ | SBCS(255) | NONE |
| 5 | imagemd | chromaticities_primary_green_y | This specifies the Green [y] value for the chromaticities of the primary colors of the imaging process. Note: These values specify the 1931 CIE xy chromaticities of the capture primaries. The ordering is red [x], red [y], green[x], green[y],blue[x],blue[ | SBCS(255) | NONE |
| 6 | imagemd | chromaticities_primary_red_x | This specifies the Red [x] value for the chromaticities of the primary colors of the imaging process. Note: These values specify the 1931 CIE xy chromaticities of the capture primaries. The ordering is red [x], red [y], green[x], green[y],blue[x],blue[y] | SBCS(255) | NONE |
| 7 | imagemd | chromaticities_primary_red_y | This specifies the Red [y] value for the chromaticities of the primary colors of the imaging process. Note: These values specify the 1931 CIE xy chromaticities of the capture primaries. The ordering is red [x], red [y], green[x], green[y],blue[x],blue[y] | SBCS(255) | NONE |
| 8 | imagemd | chromaticities_white_point_x | The X value for the white point chromaticity of the effective illumination source of the capture process. Notes: These values specify the 1931 CIE xy chromaticities of the effective illumination (i.e., filter/light source combination) at capture. They do | SBCS(255) | NONE |
| 9 | imagemd | chromaticities_white_point_y | The Y value for the white point chromaticity of the effective illumination source of the capture process. Notes: These values specify the 1931 CIE xy chromaticities of the effective illumination (i.e., filter/light source combination) at capture. They do | SBCS(255) | NONE |
| 10 | imagemd | color_map_bitcode_value | Color lookup table for non-RGB images. | SBCS(255) | NONE |
| 11 | imagemd | color_map_blue_value | This field provides the Blue Value within a particular RGB triplet of the Colormap (often called a lookup table) for palette-color images. Particular triplet is reference in colormap_bitcode_value. Possible values are 0-255. Note: There is no Colormap in | SBCS(255) | NONE |
| 12 | imagemd | color_map_green_value | This field provides the Green Value within a particular RGB triplet of the Colormap (often called a lookup table) for palette-color images. Particular triplet is reference in colormap_bitcode_value. Possible values are 0-255. Note: There is no Colormap in | SBCS(255) | NONE |
| 13 | imagemd | color_map_location | The location of the color map, e.g., image file, auxiliary file, associated file, metadata. | Enumerated Type | Associated File, Auxiliary File, Image File, Metadata |
| 14 | imagemd | color_map_red_value | This field provides the Red Value within a particular RGB triplet of the Colormap (often called a lookup table) for palette-color images. Particular triplet is reference in colormap_bitcode_value. Possible values are 0-255. Note: There is no Colormap in R | SBCS(255) | NONE |
| 15 | imagemd | compression_level | Designates the level of compression used in compression_scheme. | Large signed number | NONE |
| 16 | imagemd | compression_scheme | Designates the compression scheme used to store the image data. Values above are drawn from TIFF 6.0 specification though institutions are encouraged to devise a local enumerated list to allow for the addition of new values as technology changes. This dat | Enumerated Type | 1, 2, 3, 4, JPEG, 32773, LZW |
| 17 | imagemd | extra_samples | Specifies that each pixel has extra components. | Enumerated Type | 0, 1, 2, 3 |
| 18 | imagemd | gray_response_loc | The location of the gray response curve values, e.g., image file, auxiliary file, associated file, metadata. | Enumerated Type | Associated File, Auxiliary File, Image File, Metadata |
| 19 | imagemd | gray_response_unit | Unit of measure of gray response curve values. | Suggested Enumerated Type | NONE |
| 20 | imagemd | gray_response_value | Gray response curve values, used when a response curve is generated at the start of a capture session. | Large signed number | NONE |
| 21 | imagemd | image_data | Temporary location of the target file if not contained within the image file (external) e.g. URN, URL, etc. See also target_id and target_type. (NISO-image terminology) | SBCS(255) | NONE |
| 22 | imagemd | image_identifier | A persistent identifier required at prime object level, optional at all other levels. This identifier must be unique within the local system. | SBCS(255) | NONE |
| 23 | imagemd | image_identifier_location | A location qualifier to be used in conjunction with image_identifier. Persistent identifier required at prime object level, optional at all other levels. This identifier must be unique within the local system. To facilitate file sharing or interoperabilit | SBCS(255) | NONE |
| 24 | imagemd | note | Additional information or comments about the image object. | SBCS(255) | NONE |
| 25 | imagemd | orientation_disk | Orientation of the image saved on disk, e.g., normal, normal rotated 180, normal rotated cw 90, etc.D164. | Enumerated Type | Normal, Rotated 180, Rotated CW 90, Rotated CCW 90, Unknown |
| 26 | imagemd | orientation_display | Orientation of the image as displayed, e.g., landscape or portrait. | Enumerated Type | Landscape, Portrait |
| 27 | imagemd | performance_data | Identifies the path of the file that contains the image performance data relative to the target identified in target_id, e.g. filename, URL, URN. | SBCS(255) | NONE |
| 28 | imagemd | photometric_interp | Designates the color space of the decompressed image data as defined in the NISO image data dictionary. 0 = White Is Zero, bitonal (typical) or grayscale 1 = Black Is Zero, grayscale (typical) or bitonal 2 = RGB 3 = Palette color 4 = Transparency Mas | Enumerated Type | 0, 1, 2, 3, 4, 5, 6, 8 |
| 29 | imagemd | pixels_horizontal | Horizontal dimension of image in pixels, e.g., 1024. | Large signed number | NONE |
| 30 | imagemd | pixels_vertical | Vertical dimension of image in pixels, e.g., 768, called ImageLength in the NISO image data dictionary. | Large signed number | NONE |
| 31 | imagemd | planar | Designates how the components of each pixel are stored. 1 = Chunky Format 2 = Planar Format | Enumerated Type | 1, 2 |
| 32 | imagemd | preferred_presentation | Designation of the device, application, medium, viewing environment (or any combination thereof) to render the image data. For image data that can be defined to have a best representation,? use this free-text field to recommend the target? device, applica | SBCS(255) | NONE |
| 33 | imagemd | profile_name | Designates the well-defined name of the ICC profile used. If ICC profile used is a well-known and well-documented profile, record the information in this data element. If not, record the location of where the profile can be found in profile_url. | SBCS(255) | NONE |
| 34 | imagemd | profile_url | Designates the URL/URN where the ICC profile is located. If ICC profile used is a well-known and well-documented profile, record the information in profile_name. If not, record the location of where the profile can be found in this data element. | SBCS(255) | NONE |
| 35 | imagemd | profiles | Identifies the path of the file that contains the ICC color profile or other image management profiles, e.g. filename, URL, URN. Notes: Each target shall be represented by its own logical metadata block. | SBCS(255) | NONE |
| 36 | imagemd | reference_black_white | Encodes a pair of headroom and footroom image data values for each pixel component. This tag is mandatory when PhotometricInterpretation = 6 (YCbCr), and there are no defaults allowed. See TIFF Section 21 YCbCr Images and ISO/TC42N 4378 TIFF/EP standard, | Enumerated Type | NONE |
| 37 | imagemd | samples_per_pixel | The number of color components (samples) per pixel, e.g., 3 (RGB) , 4 (CYMK), etc. | Suggested Enumerated Type | NONE |
| 38 | imagemd | sampling_freq_unit | Unit of measure for horizontal and vertical sampling frequency, e.g., inches, centimeters, or unknown. | Enumerated Type | Inches, Centimeters, Unknown |
| 39 | imagemd | sampling_frequency_horizontal | Number of pixels per sampling frequency unit by width. | Large signed number | NONE |
| 40 | imagemd | sampling_frequency_plane | Reference plane location for horizontal and vertical sampling frequency. | Suggested Enumerated Type | NONE |
| 41 | imagemd | sampling_frequency_vertical | Number of pixels per sampling frequency unit by height. | Large signed number | NONE |
| 42 | imagemd | segment_form | Specifies whether the image is stored in tiles or strips. | Enumerated Type | Strips, Tiles |
| 43 | imagemd | strip_byte_counts | Number of image data bytes stored within each strip after compression. | Large signed number | NONE |
| 44 | imagemd | strip_offsets | Byte offset of a strip. | Large signed number | NONE |
| 45 | imagemd | strip_rows | Number of rows per strip. | Large signed number | NONE |
| 46 | imagemd | target_id | Calibration target name, manufacturer, version, etc. See also image_data and target_type. (NISO-image terminology) | SBCS(255) | NONE |
| 47 | imagemd | target_id_manufacturer | Identifies the manufacturer or organization that created the target. Notes: Each target shall be represented by its own logical metadata block. | SBCS(255) | NONE |
| 48 | imagemd | target_id_media | Identifies the media of the target. Notes: Each target shall be represented by its own logical metadata block. | SBCS(255) | NONE |
| 49 | imagemd | target_id_name | Identifies the name of the target. Notes: Each target shall be represented by its own logical metadata block. | SBCS(255) | NONE |
| 50 | imagemd | target_id_no | Identifies the version or number of the target. Notes: Each target shall be represented by its own logical metadata block. | SBCS(255) | NONE |
| 51 | imagemd | target_type | Conveys whether the target image is internal to the image file or external. See also image_data and target_id. (NISO-image terminology) | Enumerated Type | external, internal |
| 52 | imagemd | tile_byte_counts | Number of image data bytes stored within each tile after compression. | Large signed number | NONE |
| 53 | imagemd | tile_height | Tile height in pixels, called TileLength in the NISO image data dictionary. | Large signed number | NONE |
| 54 | imagemd | tile_offsets | Byte offset of a tile. | Large signed number | NONE |
| 55 | imagemd | tile_width | Tile width in pixels. | Large signed number | NONE |
| 56 | imagemd | watermark | Type of watermark used in the file, e.g., Digimarc, Giovanni, Alpha-Tec, StirMark, etc. | SBCS(255) | NONE |
| 57 | imagemd | x_targeted_displayar | Unit of X orientation. | Large signed number | NONE |
| 58 | imagemd | y_targeted_displayar | Unit of Y orientation. | Large signed number | NONE |
| 59 | imagemd | ycbcr_coefficients | Encodes the transformation from RGB to YCbCr image data. It is mandatory when PhotometricInterpretation = 6, and there are no defaults allowed. The transformation is specified as three rational values that represent the coefficients used to compute lumina | Enumerated Type | NONE |
| 60 | imagemd | ycbcr_positioning | Designates the positions of subsampled chrominance components relative to luminance samples. This tag is mandatory when PhotometricInterpretation = 6, and the value shall equal 2. See TIFF Section 21 YCbCr Images and ISO/TC42N 4378 TIFF/EP standard, Secti | Enumerated Type | NONE |
| 61 | imagemd | ycbcr_subsampling | Designates the subsampling factors used for the chrominance components of a YCbCr image. It is mandatory when PhotometricInterpretation = 6, and there are no defaults allowed. See TIFF Section 21 YCbCr Images and ISO/TC42N 4378 TIFF/EP standard, Section 5 | Enumerated Type | NONE |