Raymarine e7D, Installation And Operation Handbook, Page: 206 / 270

20.3 Image adjustments
Thermal and visible-light operation
“Dual payload” thermal cameras are equipped with 2 camera lenses
— a thermal imaging (infrared) camera lens and a visible-light
camera lens.
Thermal camera lens —
provides night-time imagery,
based on temperature
differences between objects.
Thermal imaging produces
a clear image even in total
darkness.
Visible-light camera lens —
provides black and white (or
greyscale) imagery during the
day and in low-light conditions.
Helps to improve navigational
abilities in low-light conditions;
for example during twilight
hours when operating along
intercoastal waterways and
near harbor entrances.
Switching between thermal and visible-light camera lenses
With the thermal camera application displayed:
1. Select
Menu .
2. Select Image Options .
3. Use the Image Type menu item to switch between IR and Visible
Light views, as appropriate.
Adjusting the thermal camera image
With the thermal camera application displayed:
1. Select
Menu .
2. Select Adjust Contrast .
3. Select the Contrast, Brightness, or Color option as appropriate.
4. Use the rotary control to adjust as required.
Thermal camera scene presets
Scene presets enable you to quickly select the best image setting
for the current environmental conditions.
During normal operation the thermal camera automatically adjusts
itself to provide a high-contrast image optimized for most conditions.
The Scene presets provide 4 additional settings that may provide
better imagery in certain conditions. The 4 modes are:
Night Running — scene preset mode for night conditions.
Day Running — scene preset mode for daytime
conditions.
Night Docking — scene preset mode for night docking.
Search — scene preset mode for identifying people or
objects in the water.
Although the preset names indicate their intended use, varying
environmental conditions might make another setting more
preferable. For example, the night running scene preset might also
be useful while in a harbor. You may find it beneficial to experiment
with the different scene presets to discover the best preset to use
for different conditions.
Changing the thermal camera scene preset
With the thermal camera application displayed:
1. Select
Menu .
2. Select Image Options .
3. Use the Scene menu item to switch between the available scene
presets, as appropriate.
Thermal camera color modes
A range of color modes is available to help you distinguish objects
on-screen in different conditions.
The
Color Palette option switches the thermal camera image
between a greyscale mode and 1 or more color modes. There are
5 color modes available.
The factory default color mode is red, which may improve your night
vision. This default mode can be changed if required using the
camera’s
Video Set-up menu.
Note: If you have the Disable Color Thermal Video option
selected in the camera’s Video Set-up menu, only 2 color modes
are available — greyscale and red.
Changing the thermal camera color mode
With the thermal camera application displayed:
1. Select
Menu .
2. Select Image Options .
3. Use the Color Palette menu item to switch between the available
color palettes, as appropriate.
Thermal camera reverse video
You can reverse the polarity of the video image to change the
appearance of objects on-screen.
The reverse video option (video polarity) switches the thermal
image from white-hot (or red-hot if the color mode setting is active)
to black-hot. The difference between white-hot and black-hot is
shown below:
White-hot thermal image.
Black-hot thermal image.
You may find it useful to experiment with this option to find the best
setting to suit your needs.
Enabling thermal camera reverse video
With the thermal camera application displayed:
1. Select
Menu .
2. Select Image Options .
3. Select Reverse Video .
Thermal camera rear view mode
The rear view mode flips the video image horizontally, providing a
“mirror image”.
This is useful for example in instances where the camera is
rear-facing and you are viewing the image on a forward-facing
monitor.
206 e7 / e7D / e95 / e97 / e125 / e127 / c95 / c97 / c125 / c127