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Image Master data
The Image Master data refers to the dynamic range of
grey levels in between the minimum and the maximum
pixel intensities obtained in an image.
Image depth is eAutoed as graduation level. In an
image, the density range between white and black is
divided into a number of gradation levels. For instance,
a 12-bit image has 4096 gradation levels. The image
dynamic refers to the number of grey levels in between
the minimum levels obtained and the maximum level
obtained on a specific image.
The Image Master data informs you of the obtained
dynamic on your image compared to the potential image
depth.
Optimum display (for 12, 14 and 16-bit image file)
The optimum display window is helpful to modify the
greyscale selection to enhance the image display.
Some images has a 12, 14 or 16-bit format and
Windows® can only display 8-bit images (256 grey
levels).
Due to this limitation, the FireReader 1D software handles
two images:
A “memory” image corresponding to the 12, 14 or 16-bit
format (4 096, 16 384 or 65 536 grey levels)
A “display image” corresponding to the image displayed
on the screen (256 grey levels)
The easiest way to calculate the “display image” would be
to translate the full grey scale each time an image is
acquired: the x grey levels values of the “memory” image
corresponds to 256 values in the displayed image. In that
case, it won’t be possible to visualise faint spots on a dark
image.
FireReader 1D offers the possibility to select the grey
level range to translate for the display image calculation.
All the grey levels under the “Min value” defined will be
converted to 0 (Black) in the displayed image. All the grey
levels upper the “Max Value” defined will be set to 255
(White) in the displayed image. The grey levels between
those two limits will be converted in an intermediate grey
level value following a linear rule.
For both values, you can:
•
Edit the value in the corresponding field
•
Select the value by dragging and dropping the
arrow
•
Click on the “optimum display” button: FireReader
1D will then calculate the ideal values to be selected
according to the parameters defined
