Sensor-synchronized spectrally-structured-light imaging
First Claim
Patent Images
1. An apparatus for spectral imaging comprising:
- an image sensor operable to obtain images, the images comprising pixel values corresponding to locations in a field of view of the image sensor;
an illumination source comprising at least three LEDs, each a different color;
a drive circuit that selectively strobes on the LEDs synchronized with capture of frames of the images by the image sensor;
means for obtaining multi-spectral channel values per pixel corresponding to the LEDs;
means for computing a spatial relationship function of pixels sampled from different locations of the field of view; and
means for classifying an object depicted in the images as being one of plural different classes based on the multi-spectral channels per pixel and spatial relationship function.
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Abstract
A spectral imaging device is configured to capture color images synchronized with controlled illumination from different color light emitting diodes. A processor in the device applies a coupling factor to sampled color images to convert sampled pixels into spectral channels corresponding to LED color and color filter. Multi-spectral spectricity vectors produced at pixel locations are used along with spatial information to classify objects, such as produce items.
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20 Claims
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1. An apparatus for spectral imaging comprising:
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an image sensor operable to obtain images, the images comprising pixel values corresponding to locations in a field of view of the image sensor; an illumination source comprising at least three LEDs, each a different color; a drive circuit that selectively strobes on the LEDs synchronized with capture of frames of the images by the image sensor; means for obtaining multi-spectral channel values per pixel corresponding to the LEDs; means for computing a spatial relationship function of pixels sampled from different locations of the field of view; and means for classifying an object depicted in the images as being one of plural different classes based on the multi-spectral channels per pixel and spatial relationship function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification