IMAGE RECOGNITION DEVICE, IMAGE RECOGNITION METHOD, AND IMAGE RECOGNITION PROGRAM
First Claim
1. An image recognition device comprising:
- an image acquiring unit configured to acquire an image; and
an object recognition unit configured to calculate gradient directions and gradient values of intensity of the image acquired by the image acquiring unit, to scan the gradient values of each acquired gradient direction with windows, calculate a rectangular feature value, and extract a window in which a target object is recognized to be present using a classifier based on the calculated rectangular feature value through the use of a first recognition unit, and to calculate a predetermined feature value from the window extracted by the first recognition unit and recognize the target object using a classifier based on the predetermined feature value through the use of a second recognition unit.
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Abstract
An image recognition device includes an image acquiring unit configured to acquire an image, and an object recognition unit configured to calculate gradient directions and gradient values of intensity of the image acquired by the image acquiring unit, to scan the gradient values of each acquired gradient direction with windows, calculate a rectangular feature value, and extract a window in which a target object is recognized to be present using a classifier based on the calculated rectangular feature value through the use of a first recognition unit, and to calculate a predetermined feature value from the window extracted by the first recognition unit and recognize the target object using a classifier based on the predetermined feature value through the use of a second recognition unit.
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Citations
21 Claims
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1. An image recognition device comprising:
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an image acquiring unit configured to acquire an image; and an object recognition unit configured to calculate gradient directions and gradient values of intensity of the image acquired by the image acquiring unit, to scan the gradient values of each acquired gradient direction with windows, calculate a rectangular feature value, and extract a window in which a target object is recognized to be present using a classifier based on the calculated rectangular feature value through the use of a first recognition unit, and to calculate a predetermined feature value from the window extracted by the first recognition unit and recognize the target object using a classifier based on the predetermined feature value through the use of a second recognition unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An image recognition method comprising:
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causing an image acquiring unit to acquire an image; and causing an object recognition unit to calculate gradient directions and gradient values of intensity of the image acquired by the image acquiring unit, to scan the gradient values of each acquired gradient direction with windows, calculate a rectangular feature value, and extract a window in which a target object is recognized to be present using a classifier based on the calculated rectangular feature value through the use of a first recognition unit, and to calculate a predetermined feature value from the window extracted by the first recognition unit and recognize the target object using a classifier based on the predetermined feature value through the use of a second recognition unit.
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21. An image recognition program causing a computer to perform:
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a sequence of causing an image acquiring unit to acquire an image; and a sequence of causing an object recognition unit to calculate gradient directions and gradient values of intensity of the image acquired by the image acquiring unit, to scan the gradient values of each acquired gradient direction with windows, calculate a rectangular feature value, and extract a window in which a target object is recognized to be present using a classifier based on the calculated rectangular feature value through the use of a first recognition unit, and to calculate a predetermined feature value from the window extracted by the first recognition unit and recognize the target object using a classifier based on the predetermined feature value through the use of a second recognition unit.
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Specification