Sony Patent | Information processing apparatus, information processing method, and program for determining contact on the basis of a change in color of an image

Patent: Information processing apparatus, information processing method, and program for determining contact on the basis of a change in color of an image

Publication Number: 10175825

Publication Date: 2019-01-08

Applicants: Sony

Abstract

There is provided an information processing apparatus, an information processing method, and a program that are capable of detecting contact with high precision from an image picked-up by a normal camera, the information processing apparatus including a contact determination unit. The contact determination unit determines contact of an operation body with a target object on the basis of a change in a color of an image including the target object and the operation body.

Background

In recent years, along with diversification of utilization forms of information processing equipment, a new UI (user interface) is being researched. For example, a technology in which an icon is displayed on a head-mounted display, the icon is projected on a target object (e.g., palm and desk), and selection of the icon is input when the operation body (e.g., finger and stylus) touches the projected icon is developed.

For contact of the operation body with the target object, a stereo camera, a 3D sensor, or the like is used. The UI recognizes the target object and the operation body, and detects the position of the operation body and the plane shape of the target object on the basis of 3D information acquired from the stereo camera, 3D sensor, or the like. The UI is capable of determining, as the contact, the distance between the target object and the operation body being equal to or less than a predetermined value.

Summary

Problem to be Solved

However, in the above-mentioned method, it needs to provide a detection means such as a stereo camera and a 3D sensor for detecting contact, and there is a problem of increase in size of the device, increase in power consumption, and increase in cost. Further, it is difficult to use the stereo camera and 3D sensor under sunlight because of the properties thereof. Further, a user’s unintended input may be made in the case where non-contact is determined as contact when the operation body approaches the target object.

In view of the circumstances as described above, it is an object of the present technology to provide an information processing apparatus, an information processing method, and a program that are capable of detecting contact with high precision from an image picked-up by a normal camera.

Means for Solving the Problem

In order to achieve the above-mentioned object, an information processing apparatus according to an embodiment of the present technology include a contact determination unit that determines contact of an operation body with a target object on the basis of a change in a color of an image including the target object and the operation body.

With this configuration, because a change in color is used for detection of contact between the target object and the operation body, it is possible to perform contact detection from an image picked up by a general camera. Note that the color is the same meaning as the pixel value, and includes brightness.

The information processing apparatus may further include an object recognition processing unit that recognizes the operation body included in the image, in which the contact determination unit may determine contact of the operation body with the target object on the basis of a change in a color of the operation body.

With this configuration, because the object recognition processing unit recognizes the operation body (e.g., finger and stylus), the contact determination unit is capable of detecting contact by using the change in a color of the recognized operation body.

The object recognition processing unit may use an object detection dictionary to recognize the operation body.

The object recognition processing unit is capable of recognizing the operation body by checking an image against the object detection dictionary in which information on objects that can be the operation body is stored.

The object recognition processing unit may recognize an object that has entered the image as the operation body.

When an object newly enters the image (image-pickup range of a camera), the object recognition processing unit is capable of recognizing the object as the operation body.

The contact determination unit may determine contact of the operation body with the target object on the basis of a change in a predetermined color.

By setting a color of an object (finger, stylus, or the like) that can be the operation body in advance, the contact determination unit is capable of detecting contact by using the change in the color even if the object of the operation body is recognized.

The predetermined color may be a color corresponding to a color of a finger of a fingertip.

The color of a fingertip is changed when the finger is in contact with a some kind of object. Therefore, the contact determination unit is capable of determining contact of the operation body with the target object by using the change in a color corresponding to the color of the fingertip when the operation body is the finger.

The contact determination unit may determine contact of the operation body with the target object on the basis of a change in a color of the operation body.

In the case where an object whose color (including brightness) is changed when the object is in contact with something is the operation body as in the above-mentioned color of the fingertip, the contact determination unit is capable of determining contact on the basis of a change in a color of the operation body.

The contact determination unit may determine contact of the operation body with the target object on the basis of a change in a color of the target object.

When the target object is an object whose color is changed in response to contact of the operation body, the contact determination unit may determine contact by using a change in a color of the target object.

The contact determination unit may determine contact of the operation body with the target object on the basis of a change in a color of the target object due to a shadow of the operation body.

The contact determination unit may determine contact by using a change in a color of the target object due to a shadow of the operation body. For example, because the shadow is deepened when the operation body approaches the target object, this may be used to determine contact.

The contact determination unit may further determine a degree of contact of the operation body on the target object on the basis of the change in the color of the image.

In the case where the change in a color of the operation body is different depending on the degree of contact, the contact determination unit is capable of using the change in a color to determine the degree of contact (pressing force).

The contact determination unit may further determine a direction of contact of the operation body with the target object on the basis of the change in the color of the image.

In the case where the change in a color of the operation body is different depending on the direction of contact, the contact determination unit is capable of using the change in a color to determine the direction of contact (pressing direction).

The information processing apparatus may further include an input control unit that controls an operation input on the basis of a determination result of the contact determination unit.

When the contact determination unit determines contact between the operation body and the target object, the input control unit is capable of receiving an operation input depending on the contact position or the number of contacts, and supplying it to the OS or the like.

The information processing apparatus may further include an image output unit that generates an operation target image superimposed on the target object, in which

the input control unit may control an operation input on the basis of a contact position between the operation body and the target object in the operation target image.

The image output unit generates an operation target image that is displayed on an HMD (Head Mounted Display), projector, or the like, and superimposed on the target object. The input control unit is capable of calculating the positional relationship between the operation target image and the contact position on the basis of the contact position in the operation target image and the superimposition position of the operation target image on the target object, and receiving an operation input depending on the content (icon, etc.) of the operation target image superimposed on the contact position.

The information processing apparatus may further include an object recognition processing unit that recognizes the operation body included in the image, in which

the input control unit may control an operation input on the basis of a shape of the operation body recognized by the object recognition processing unit and a determination result of the contact determination unit.

The object recognition processing unit may recognize the shape of the operation body (e.g., the shape of fingers at the time of pinching operation), and supply it to the input control unit. Accordingly, the input control unit is capable of receiving the operation input depending on the shape of the operation body.

The information processing apparatus may further include an object recognition processing unit that recognizes the target object included in the image, in which

the contact determination unit may determine contact of the operation body with the target object on the basis of the change in the color of the image when the target object is a rigid body and contact of the operation body with the target object on the basis of a direction of a normal line on a surface of the target object acquired by a normal line direction detection sensor when the target object is not a rigid body.

Although the normal line direction on the surface of an object (direction perpendicular to the surface of the object) can be detected by the normal line direction detection sensor, and contact can be determined by using deformation of the target object due to contact, it is difficult to use it in the case where the target object is a rigid body (object that is not deformed). On the other hand, contact can be determined by using the change in a color of the image even if the target object is a rigid body.

The contact determination unit may determine contact of the operation body with the target object on the basis of the change in the color of the image when a distance between the target object and the operation body acquired by a depth sensor is equal to or less than a predetermined value.

The depth sensor is capable of measuring the distance between the sensor and the object by using a projection pattern of an infrared ray or the like. In the case where the distance between the target object and the operation body is equal to or lower than a predetermined value, the contact determination unit determines contact on the basis of the change in a color of the image. Accordingly, it is possible to determine contact only in the case where the possibility of contact is high.

In order to achieve the above-mentioned object, a program according to an embodiment of the present technology causes an information processing apparatus to function as a contact determination unit that determines contact of an operation body with a target object on the basis of a change in a color of an image including the target object and the operation body.

In order to achieve the above-mentioned object, an information processing method according to an embodiment of the present technology includes determining, by a contact determination unit, contact of an operation body with a target object on the basis of a change in a color of an image including the target object and the operation body.

Effects

As described above, according to the present technology, it is possible to provide an information processing apparatus, an information processing method, and a program that are capable of detecting contact with high precision from an image picked-up by a normal camera. It should be noted that the effect described here is not necessarily limitative and may be any effect described in the present disclosure.

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