Apparatus and method for detecting optical characteristics of agricultural product tissue by spatial frequency domain imaging
A technology of spatial frequency domain imaging and optical characteristics, which is used in measurement devices, color/spectral characteristics measurement, material analysis by optical means, etc., and can solve problems such as inability to accurately obtain optical characteristics.
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Embodiment 1
[0097] Experimental operation and data processing steps of embodiment 1:
[0098] Turn on the system, warm up the DLP projector for 10 minutes, debug the image periodic acquisition software and digital signal generator at the same time, set the image acquisition cycle, and fix the reference whiteboard with the sample clamp;
[0099] After the warm-up is completed, start the PowerPoint automatic playback and image periodic acquisition software at the same time, and collect 49 images at 460nm. After the completion, change the wavelength, and perform image acquisition at 527nm and 630nm in sequence;
[0100] Replace the optical solid Phantom, and collect images at three wavelengths in sequence; turn off the DLP projector, and collect dark field images; turn off the system, and select the image ROI (50×40pixels);
[0101] Obtain the diffuse reflection image of the solid Phantom through demodulation; obtain the absorption coefficient μ of each pixel in the ROI through nonlinear fit...
Embodiment 2
[0106] On the basis of the above-mentioned optical solid Phantom experiment, embodiment 2 selects red Fuji apple for further experiments, and the experimental setting parameters remain unchanged. The specific operation and data processing steps are as follows:
[0107] Turn on the system, warm up the DLP projector for 10 minutes, debug the image periodic acquisition software and digital signal generator at the same time, set the image acquisition cycle, and fix the reference whiteboard with the sample clamp;
[0108] After the warm-up is completed, start the PowerPoint automatic playback and image periodic acquisition software at the same time, and collect 49 images at 460nm. After the completion, change the wavelength, and perform image acquisition at 527nm and 630nm in sequence;
[0109] Replace apple tissue slices, and sequentially collect images at three wavelengths; turn off the DLP projector, and collect dark field images; turn off the system, and select image ROI (40×60p...
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