Technical Metadata profile for scanned paper documents
Technical metadata profile draws on two sources: TIFF metadata guidelines from digitizationguidelines.gov and TIFF tags supported by the LOC.
IMPORTANT NOTE: The column for the serial number (labeled 'S. No.') in the following tables is not intended to convey any ordering or hierarchy among the metadata labels/properties. It is there to provide easy references while discussing the metadata profile with the team.
TIFF- Metadata
S. No. | Label | Property | Range | Usage | Example | Obligation | Comments |
|---|---|---|---|---|---|---|---|
1 | Image | technical.image |
|
| 1 |
| |
2 | Timestamp of scanning | technical.scanDateTime |
| The time when this image was scanned. Use the value in the tiff:timestamp field as the creation and modification dates appear to be unreliable. | 2011-03-04T14:12:52-05:00 | 1 | Convert the date to EDTF format |
3 | Scanner | technical.scanner |
|
| 1 |
| |
5 | Rows per Strip | technical.rowsPerStrip |
| The number of rows per strip. This is the number of rows in the image of one strip when an image is divided into strips. With JPEG compressed data this designation is not needed and is omitted. | 1-100 | 0-1 |
|
6 | Endian | technical.endian |
| The Byte Order (also known as endianness) describes the sequence or order of bytes. | lsb, MM | 0-1 |
|
7 | Orientation | technical.orientation |
| The image orientation viewed in terms of rows and columns. | TopLeft, TopRight | 0-1 |
|
Image
S. No. | Label | Property | Range | Usage | Example | Obligation | Comments |
|---|---|---|---|---|---|---|---|
1 | ImageWidth | technical.image.width |
| The number of pixels per row | 3616 | 1 | Typical scanner size |
2 | ImageLength | technical.image.length |
| The number of rows of pixels in the image | 4418 | 1 | Typical scanner size |
3 | BitsPerSample | technical.image.bitsPerSample |
| Number of bits per component | Grayscale 24-bit color | 1 | 8 24 |
4 | Compression | technical.image.compression |
| Compression scheme used on image data | None CCITT group 4 | 1 | Uncompressed 4 |
5 | PhotometricInterpretation | technical.image.photometricInterpretation |
| The color space of the image data. | min-is-black RGB. | 1 | Additional color spaces are possible: CMYK (5), YCbCr (6), CIE L*a*b* (8), and others. |
6 | SamplesPerPixel | technical.image.samplesPerPixel |
| The number of components per pixel | 1 3 | 1 | Grayscale 24-bit RGB color |
7 | XResolution | technical.image.xResolution |
| Horizontal pixel count per resolution unit (inches, centimeters) | 400 | 1 | 240 ppi: Rational data type - 240 pp(unit) is often displayed this way |
8 | YResolution | technical.image.yResolution |
| Vertical pixel count per resolution unit (inches, centimeters) | 400 | 1 | 300 ppi: see above |
9 | ResolutionUnit | technical.image.resolutionUnit |
| Unit of measurement for X and Y Resolution (pixels per inch or centimeter) | PixelsPerInch PixelsPerCentimeter | 1 | None: pixel is irregularly shaped |
10 | ColorSpace | technical.image.colorSpace |
| sRGB specification | sRGB uncalibrated | 1 | 1 65536 |
11 | ExtraSamples | technical.image.extraSamples |
| Description of extra components | 0 = Unspecified data 1 = Associated alpha data (with pre-multiplied color) | 0-1 | Associated alpha is generally interpreted as true transparency information. |
12 | Background color | technical.image.backgroundColor |
| Background color of the image that has been scanned. | white, black, gray | 0-1 |
|
13 | Border color | technical.image.borderColor |
| Border color of the image that has been scanned. | srgb, gray | 0-1 |
|
14 | Matte color | technical.image.matteColor |
| Matte color of the image that has been scanned. | grey, gray | 0-1 |
|
15 | Transparent color | technical.image.transparentColor |
| Transparent color of the image that has been scanned. | balck, gray | 0-1 |
|
Scanner
S. No. | Label | Property | Range | Usage | Example | Obligation | Comments |
|---|---|---|---|---|---|---|---|
1 | Scanner Make | technical.scanner.make |
| The scanner manufacturer | Sinar | 0-1 | Simple ASCII text string |
2 | Scanner Model | technical.scanner.model |
| The scanner model name or number | 54H | 0-1 | Simple ASCII text string |
3 | Scanner Software | technical.scanner.software |
| Name and version of the software package(s) used to create the image | Stokes Software Inc. IWS - Version 02.04.01.01 | 0-1 | Simple ASCII text string |