Channel image postprocessing



Simulation results displaying illuminance in lux as a channel image

Postprocessing The Channel image postprocessing displays a single channel as an image.

Ocean can display raw sensor values, but as the instrument characteristics are stored with the images, it can also compute radiometric or photometric quantities, depending on the instrument and sensor types. See quantities for more details. The values are then mapped to a selectable color gradient using linear or logarithmic scale, within the given range.

Children Nodes

This node has a filter list. It may have a variable number of filter children. The name of each filter is user-defined and does not affect the result.

Filter user-defined First spectrum
Filter user-defined Second spectrum
Filter user-defined ...


name type description
quantity list The photometric/radiometric quantity to display
channel string The channel name
colors list The color scale, can be grey, hue or thermal
rangemax real The maximum value to display, values above are clamped.
logarithmic boolean Use a logarithmic scale instead of a linear scale
logdecades integer The number of decades displayed in logarithmic scale mode
info boolean Overlays some information about simulation and software version on the image
legend boolean Displays a scale legend
grid boolean Enables grid display on the graphical user interface
gridx integer Number of grid columns
gridy integer Number of grid rows

Ocean XML 4.0 example

<postprocessing type="channelimage" name="postprocessing">
   <prm quantity="sceneradiance"/>
   <prm channel="Y"/>
   <prm colors="thermal"/>
   <prm rangemax="50000"/>
   <prm logarithmic="true"/>
   <prm logdecades="2"/>
   <prm info="false"/>
   <prm legend="false"/>
   <prm grid="false"/>
   <prm gridx="30"/>
   <prm gridy="30"/>