System for vehicular guidance with respect to harvested crop
First Claim
1. A system of guiding a vehicle, the system comprising:
- a discriminator for identifying windrow pixels associated with a windrow within a collected color image, identifying a primary color of the windrow pixels and one or more secondary colors of background pixels, and assigning a discrimination value to each pixel in the identified windrow pixels, wherein the discrimination value indicates whether the each pixel is crop image data or background image data, and wherein each pixel in the collected color image is associated with an intensity level;
a definer for defining a search space with respect to a vehicle, the search space containing a series of scan line segments, wherein the series of scan line segments has scan line intensities based on the intensity level in the each pixel in the collected color image;
an evaluator for determining respective spatial correlations between the defined search space and the windrow pixels for different angular displacements of the search space, wherein the respective spatial correlations are based on scan line intensities associated with the scan line segments for different angular displacements;
an alignment detector for determining a desired vehicle heading as a preferential angular heading associated with a generally maximum spatial correlation between the defined search space and the windrow pixels; and
an offset calculator for identifying a desired offset of the vehicle that is generally aligned with respect to the windrow, associated with the collected color image, consistent with the desired vehicle heading.
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Abstract
A discriminator identifies windrow pixels associated with a windrow within a collected image. A definer defines a search space with respect to a vehicle. An evaluator determines respective spatial correlations between the defined search space and the windrow pixels for different angular displacements of the search space. An alignment detector or search engine determining a desired vehicular heading as a preferential angular displacement associated with a generally maximum spatial correlation between the defined search space and the windrow pixels. An offset calculator estimates an offset of the vehicle to a central point of the windrow or a depth axis to achieve the desired vehicle heading and desired position of the vehicle with respect to the windrow.
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Citations
11 Claims
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1. A system of guiding a vehicle, the system comprising:
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a discriminator for identifying windrow pixels associated with a windrow within a collected color image, identifying a primary color of the windrow pixels and one or more secondary colors of background pixels, and assigning a discrimination value to each pixel in the identified windrow pixels, wherein the discrimination value indicates whether the each pixel is crop image data or background image data, and wherein each pixel in the collected color image is associated with an intensity level; a definer for defining a search space with respect to a vehicle, the search space containing a series of scan line segments, wherein the series of scan line segments has scan line intensities based on the intensity level in the each pixel in the collected color image; an evaluator for determining respective spatial correlations between the defined search space and the windrow pixels for different angular displacements of the search space, wherein the respective spatial correlations are based on scan line intensities associated with the scan line segments for different angular displacements; an alignment detector for determining a desired vehicle heading as a preferential angular heading associated with a generally maximum spatial correlation between the defined search space and the windrow pixels; and an offset calculator for identifying a desired offset of the vehicle that is generally aligned with respect to the windrow, associated with the collected color image, consistent with the desired vehicle heading. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system of guiding a vehicle, the system comprising:
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a discriminator capable of identifying windrow image data associated with a harvested crop in a collected color image and background image data in the collected color image based on color and capable of assigning a discrimination value to each portion of image data identified in the collected color image based on whether the each portion is window image data or background image data; a definer capable of defining a search space with respect to a vehicle, the search space containing a series of scan line segments; an evaluator capable of determining respective spatial correlations between the defined search space and the windrow image data for different angular displacements of the search space, wherein the respective spatial correlations are based on scan line intensities associated with the scan line segments for different angular displacements; an alignment detector capable of determining a desired vehicle heading as a preferential angular heading associated with a generally maximum spatial correlation between the defined search space and the windrow image data; and an offset calculator capable of identifying a desired offset of the vehicle that is generally aligned with respect to the windrow, associated with the collected color image, consistent with the desired vehicle heading. - View Dependent Claims (11)
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Specification