A manuscript consists of an imaged object and the
images of that object. The imaged_object describes the
manuscript, whether a book or single sheet.
The images collection has one image element for each distinct
image of the object: outside/inside cover, folio, and so forth.
Each image element contains data on one master image and several
derivatives.
The list of Dublin Core elements to describe this
manuscript.
The number of images taken of this manuscript.
Metadata describing how the master TIFF file was
derived from the raw image described in the
capture section.
The date of manual image cropping and color
correction made by the operator to the evaluation
copy of the raw image.
The date of quality assurance verification
after correction before modification.
The date of the automated application of color
manual correction made by the user to the
evaluation copy of the raw images and the
creation of master and other derivative images.
The date of visual inspection by the operator
of the outputs of the IWS software's automation
output.
Crop information describing how the master
was derived from the raw image.
The raw image is
rotated before cropping. For example, if the raw
image is rotated 90 degrees clockwise,
the "top" of the image is the post-rotation top of
the image (which had been the left edge of the image
before the rotation).
The cropping for the master TIFF image is expressed
in the IWS database in percentage values multiplied
by 1000. Here, these values are given as real
numbers to three places of percision.
Degrees of deskew rotation applied by the operator
during correction.
Scale applied to this derivative: pixelsPerInch,
maxPixelsPerSide, or none. Should be none for
the master TIFF.
Derivative bit depth: usually 24-bit for color
images.
Whether the derivative is rotated.
Whether the derivative is color corrected.
Either the camera-calculated pixels per inch value
of the image (the default) or an operator-entered
value that overrides the camera value (stored in
the IWS database as raw_image_ppi).
Each imaged cover and page of a manuscript or book
rests flat on a vacuum wedge that is parallel to
the camera sensor.
The camera calculates the image's PPI value based on
its distance from the wedge. While this gives an
accurate PPI value for the flat components of a
manuscript or printed book, it is not correct for
edge components, which are photographed by placing
the book's flat surface perpendicular to the
wedge.
Images of a manuscript's spine, head, tail, or
fore-edge have a focal plane closer to the camera
from the wedge by the height or width of the book.
For these images, the operator calculates the actual
PPI, using a ruler placed in the same focal plane as
the imaged object.
How the image should be rotated after capture
to be for the object to upright in the view frame.
Folios are usually imaged at a right angle to the
top of the sensor and so the captured images are
rotated -90.0º or 90.0º.
At capture images are rotated. Cropping, color
correction and other values are based on and
applied to the rotated raw image.
Current values:
1x1x16>0 PPI
1x1x16>600 PPI
1x1x4>0 PPI
Waiting for complete explanation from John T.
Stokes. The values 4 and 16 are the number of
shots in the scan.
The JHOVE xml output for this image.
Data describing the derivatives that may be created
from this master TIFF.
Description of the crop of this
The class value indicates the class of the derivative:
sap Standard All-Purpose JPEG image. 1800
pixels on its longest side
thumb Thumbnail JPEG. 190 pixels on its
longest side
300 300 PPI TIFF image.
Each derivative file has a flag in its name in
the last position in the name before the file
extension.
The values for derivative_scale in the IWS db are: 1800xMIN 190xMIN
300 300PPI <NONE> These values will be mapped to scale, for example:
<scale> <pixelsPerInch>300</pixelsPerInch>
</scale> <scale>
<maxPixelsPerSide>1800</maxPixelsPerSide>
</scale> <scale> <none/>
</scale>