MATLAB Answers


How can I get a thermal-infrared image preview when acquiring from a FLIR IR camera with Image Acquisition Toolbox?

I am using a FLIR GigE Vision IR (thermal infrared) camera (for example FLIR A615, A645, A655, or other GigE Vision models).
In Image Acquisition Toolbox the default preview image is grayscale / shades of gray, with low contrast, although the camera image is focused.
How can I get a preview image that uses a colormap similar to a conventional thermal infrared image (not the default grayscale colormap)?


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1 Answer

Answer by MathWorks Support Team on 29 Aug 2019
Edited by MathWorks Support Team on 29 Aug 2019
 Accepted Answer

The following MATLAB example code enables the full bit depth mode for camera preview, and specifies a jet colormap for the preview image.
To specify a manual signal range for preview, uncomment the last code section.
% Set preview data to native camera bit depth (default is 8 bit)
imaqmex('feature', '-previewFullBitDepth', true);
v = videoinput('gige', 1, 'Mono16');
% Create a preview window and get image and axes handles
im = preview(v);
ax = im.Parent;
% Specify scaled grayscale data mapping to colormap
im.CDataMapping = 'scaled';
% Specify a colormap to display grayscale image mapped to RGB image
colormap(ax, jet);
% Specify auto detection of CData limits
ax.CLimMode = 'auto';
% Or, specify a fixed signal data range to display
% signalRange = [10000 20000];
% ax.CLim = signalRange;
If desired, a custom preview functionality can be implemented as described in the following documentation page:
Other predefined or custom colormaps can be used:


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