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US 2023/0401898 A1Published application
Hand detection device, gesture recognition device, and hand detection method
AssigneeMitsubishi Electric Corporation
InventorsShogo HOTEN, Takuya MURAKAMI, Daiki HIGUCHI
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Abstract
In the hand detection device, an image acquisition unit acquires an image for hand detection, which is an image obtained by capturing a hand detection region in a vehicle. A luminance difference calculation unit calculates an inter-frame luminance difference of the image for hand detection. A hand detection unit detects a hand of a user from the image for hand detection. An erroneous detection determination unit determines whether or not the detected hand has been erroneously detected on the basis of the luminance difference between the frame in which the hand has been detected and the frame immediately preceding thereof in the hand detection area.
Claims16
A hand detection device comprising:
- a processor to execute a program, and
- a memory to store the program which, when executed by the processor, performs processes of,
- acquiring an image for hand detection, which is an image obtained by capturing a hand detection region inside a vehicle;
- calculating an inter-frame luminance difference of the image for hand detection;
- detecting a hand of a user from the image for hand detection;
- and
- determining whether or not the detected hand has been erroneously detected on the basis of the luminance difference between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection, wherein
- the processor is configured to calculate an inter-frame difference of an average luminance of the image for hand detection as a luminance difference, and
- the processor is configured to determine that the hand has been erroneously detected when the difference of the average luminance between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection is lower than or equal to a predetermined threshold.
6 more elements
-9. (canceled)
A hand detection method comprising:
- acquiring an image for hand detection, which is an image obtained by capturing a hand detection region inside a vehicle;
- calculating an inter-frame luminance difference of the image for hand detection;
- detecting a hand of a user from the image for hand detection;
- and
- determining whether or not the detected hand has been erroneously detected on the basis of the luminance difference between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection, wherein
- the luminance difference is an inter-frame difference in an average luminance of the image for hand detection, and
- that the hand has been erroneously detected is determined when the difference of average luminance between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection is lower than or equal to a predetermined threshold.
4 more elements
A hand detection device comprising:
- a processor to execute a program, and
- a memory to store the program which, when executed by the processor, performs processes of,
- acquiring an image for hand detection, which is an image obtained by capturing a hand detection region inside a vehicle;
- calculating an inter-frame luminance difference of the image for hand detection;
- detecting a hand of a user from the image for hand detection;
- and
- determining whether or not the detected hand has been erroneously detected on the basis of the luminance difference between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection, wherein
- the processor is configured to divide the image for hand detection into a plurality of blocks and calculate an inter-frame difference of a Histograms of Oriented Gradients (HOG) feature amount of each block as an inter-frame luminance difference, and
- the processor is configured to determine that the hand detected by the hand has been erroneously detected when the number of blocks in which the difference in the HOG feature amount between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection surpasses a predetermined threshold is lower than or equal to a certain number.
6 more elements
A hand detection method comprising:
- acquiring an image for hand detection, which is an image obtained by capturing a hand detection region inside a vehicle;
- calculating an inter-frame luminance difference of the image for hand detection;
- detecting a hand of a user from the image for hand detection;
- and
- determining whether or not the detected hand has been erroneously detected on the basis of the luminance difference between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection, wherein
- the luminance difference is an inter-frame difference of a Histograms of Oriented Gradients (HOG) feature amount of each block of the divided image for hand detection into a plurality of blocks, and
- that the detected hand has been erroneously detected when the number of blocks in which the difference in the HOG feature amount between a frame in which the hand has been detected and a frame immediately preceding thereof in the image for hand detection surpasses a predetermined threshold is lower than or equal to a certain number.
4 more elements
Dependencies are inferred from the claim text.