JSANCHEZ, LLC
Paper drawings in, digital drawings
out…
10420 Arthur Place, Suite 100
St. Louis, Missouri 63131
Phone: (314)-567-7779
Fax:
(314)-567-3412
Email: sanchez@jsanchez.com
8-bit gray scale
image, edited by graphics technician
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Level 6
Gray Scale
Raster Files are
images containing photographic data with 256 levels of gray.
When source materials are black
and white photographs or color photographs needed in gray scale only, this
option will provide the best digital representation of any original.
Images may be captured at a variety of resolutions, from 25 to 1200 Dots Per
Inch (500 true optical), at 8-bit (256 levels). Further, full
geometry correction (biasing) and heads-up digitizing are available as
additional post-processing options. A Level 6 scan can easily be converted into
a Level 4 or a Level 5 vector file when used as a source of line data instead
of a line drawing. Conversion or road centerlines and road right-of-way
corridors are common uses for this combination of levels.
Gray scale images are scanned and post-processed to include
de-skewing, cropping and data optimization. Just like in Levels 1 and 2, De-skewing
is used to restore correct horizontal alignment of the image. A small
rotation of the raster is usually needed to compensate for misalignment
introduced while feeding the photograph though the scanner. Non-orthogonal
photo edges are corrected as well. Cropping is important because gray
scale data requires large files, particularly at higher scan resolutions.
Cutting-off unnecessary image data substantially reduces image size and thus
processing times. Image Optimization is used to obtain the best possible
balance between brightness, contrast and gamma settings for each image. Often
originals are either too high or too low in contrast, or too light or too dark,
or have uneven distribution of gray scale data throughout the spectrum. All of
these anomalies are corrected to obtain the best possible image with the
smallest possible file size.
The most accurate way to capture your gray
scale photos
The complete scanning
and conversion solution
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