KR20160086671A - Electronic device and method for determining central of an eye in electronic device - Google Patents

Abstract

Various embodiments of the present invention relate to an electronic device and a method for determining a central portion of an eye in the electronic device. According to the present invention, an area of an eye is detected from an image, a reference point is determined from the detected eye area, and a central portion of an eye may be determined by comparing the reference point to the center of a circle, generated from the detected eye area. Other various embodiments may be possible. According to the method of the present invention, it is possible to accurately determine the center of the eye by setting the reference point in the eye area and repeatedly re-configuring the reference point.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of determining the center of an eye in an electronic device and an electronic device,

Various embodiments of the present invention are directed to electronic devices and methods of determining the center of an eye in an electronic device.

A variety of recently used electronic devices are being developed for use with various functions. For example, an electronic device (e.g., a smart phone) can provide a function of not only recognizing an eye in an image but also recognizing the center of the eye.

A variety of recently used electronic devices are being developed for use with various functions. Such an electronic device is provided with a display unit so as to more effectively utilize various functions. For example, in recent smartphones, a display unit (e.g., a touch screen) is provided in which the front surface of a device is sensitive by a touch.

In addition, various applications (also referred to as 'apps') may be installed and executed in the electronic device. Various input means (e.g., a touch screen, a button, a mouse, a keyboard, a sensor, etc.) can be used to execute and control the above applications on an electronic device.

In an electronic device, it is possible to judge that a specific region in an image is similar to an eye shape, based on a database in which morphological characteristics of eyes are recorded to determine the eyes. In addition, image characteristics (e.g., color) may be defined to determine that a particular portion of the image is an eye region. In this way, when the eye is judged based on the morphological characteristic or the image characteristic of the eye, another region of the image similar to the eye shape or image can be judged as the eye region.

A method for determining the center of an eye in an electronic device and an electronic device according to various embodiments of the present invention includes the steps of setting a reference point in the eye region of the image and resetting the set reference point, The center can be judged.

An electronic device according to various embodiments of the present invention includes a camera module for capturing an image and a camera module for detecting an eye region from the image, determining a reference point in the detected eye region, And a control unit for determining the center of the eye by comparing the reference point with the reference point.

A method for determining the center of an eye in an electronic device in accordance with various embodiments of the present invention includes the steps of detecting an eye region from an image, determining a reference point in the detected eye region, And comparing the center of the generated circle with the reference point to determine the center of the eye.

A method of determining the center of an eye in an electronic device and an electronic device according to various embodiments of the present invention includes setting a reference point for an eye region in an image and resetting the reference point to be adjacent to the center of the eye, The center point adjacent to the center of the actual eye can be determined.

The method of determining the center of an eye in an electronic device and an electronic device according to various embodiments of the present invention may further include determining a center of the eye based on pixel values or other points within the eye region, The area can be judged.

1 is a block diagram illustrating an example of an electronic device configuration, in accordance with various embodiments of the present invention.
2 is a flow chart illustrating an example of an operation of determining the center of an eye in an electronic device, in accordance with various embodiments of the present invention.
3 is a flow chart illustrating an example of an operation of determining the center of an eye in an electronic device, in accordance with various embodiments of the present invention.
4 is a flow chart illustrating an example of an operation of determining the center of an eye in an electronic device, in accordance with various embodiments of the present invention.
5 is a diagram illustrating an example of an operation of detecting an eye region in an image and determining a reference point, in accordance with various embodiments of the present invention.
6A is a diagram illustrating an example of an operation of detecting an eye region in an image according to various eye shapes, in accordance with various embodiments of the present invention.
6B is a diagram illustrating an example of an operation of detecting an eye region in an image according to various eye shapes, according to various embodiments of the present invention.
7 is a diagram illustrating an example of an operation of determining the center of an eye in an image, according to various embodiments of the present invention.
Figure 8 is an illustration of an example of an operation for determining a reference point in an image, in accordance with various embodiments of the present invention.
9 is a diagram illustrating an example of an operation for selecting a feature point based on a reference point in the eye region, according to various embodiments of the present invention.
10 is a diagram illustrating an example of an operation of determining the center of an eye according to various embodiments of the present invention.
11 is a diagram showing an example of an eye for determining the center of an eye according to various embodiments of the present invention.
12 is a block diagram illustrating an example of an electronic device configuration according to various embodiments of the present invention.
13 is a block diagram illustrating an example of a program configuration according to various embodiments of the present invention.

Best Mode for Carrying Out the Invention Various embodiments of the present invention will be described below with reference to the accompanying drawings. The various embodiments of the present invention are capable of various changes and may have various embodiments, and specific embodiments are illustrated in the drawings and the detailed description is described with reference to the drawings. It should be understood, however, that it is not intended to limit the various embodiments of the invention to the specific embodiments, but includes all changes and / or equivalents and alternatives falling within the spirit and scope of the various embodiments of the invention. In connection with the description of the drawings, like reference numerals have been used for like elements.

The use of "including" or "including" in various embodiments of the present invention can be used to refer to the presence of a corresponding function, operation or component, etc., which is disclosed, Components and the like. Also, in various embodiments of the invention, the terms "comprise" or "having" are intended to specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, But do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

The " or " in various embodiments of the present invention includes any and all combinations of words listed together. For example, " A or B " may comprise A, comprise B, or both A and B.

&Quot; first, " " second, " " first, " or " second, " etc. used in various embodiments of the present invention may modify various elements of various embodiments, I never do that. For example, the representations do not limit the order and / or importance of the components. The representations may be used to distinguish one component from another. For example, both the first user equipment and the second user equipment are user equipment and represent different user equipment. For example, without departing from the scope of the various embodiments of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it is to be understood that the element may be directly connected or connected to the other element, It should be understood that there may be other new components between the different components. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it is understood that there is no other element between the element and the other element It should be possible.

The terminology used in the various embodiments of the present invention is used only to describe a specific embodiment and is not intended to limit the various embodiments of the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. Terms such as those defined in commonly used dictionaries should be interpreted to have the meanings consistent with the contextual meanings of the related art and, unless expressly defined in the various embodiments of the present invention, It is not interpreted as meaning.

An electronic device according to various embodiments of the present invention may be an apparatus including a camera module. For example, the electronic device can be a smartphone, a tablet personal computer, a mobile phone, a videophone, an e-book reader, a desktop personal computer, a laptop Such as a laptop personal computer (PC), a netbook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), an MP3 player, a mobile medical device, a camera, or a wearable device And may include at least one of a head-mounted-device (HMD) such as electronic glasses, an electronic garment, an electronic bracelet, an electronic necklace, an electronic app apparel, an electronic tattoo, or a smart watch.

According to some embodiments, the electronic device may be a smart home appliance including a camera module. [0003] Smart household appliances, such as electronic devices, are widely used in the fields of television, digital video disk (DVD) player, audio, refrigerator, air conditioner, vacuum cleaner, oven, microwave oven, washing machine, air cleaner, set- And may include at least one of a box (e.g., Samsung HomeSync ^TM , Apple TV ^TM , or Google TV ^TM ), game consoles, electronic dictionary, electronic key, camcorder, or electronic frame.

According to some embodiments, the electronic device includes a camera module and may include various medical devices such as magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), computed tomography (CT), a camera, an ultrasound device, ), A global positioning system receiver, an event data recorder (EDR), a flight data recorder (FDR), an automotive infotainment device, a marine electronic device (eg marine navigation device and gyro compass) The mobile terminal may further include at least one of an avionics, a security device, a head unit for an automobile, an industrial or home robot, an automatic teller's machine of a financial institution, or a point of sale of a shop.

According to some embodiments, the electronic device may be a piece of furniture or a building / structure including a camera module, an electronic board, an electronic signature receiving device, a projector, (E.g., water, electricity, gas, or radio wave measuring instruments, etc.). An electronic device according to various embodiments of the present invention may be one or more of the various devices described above. Further, the electronic device according to various embodiments of the present invention may be a flexible device. It should also be apparent to those skilled in the art that the electronic device according to various embodiments of the present invention is not limited to the above-described devices.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The term user as used in various embodiments may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

According to various embodiments of the present invention, the region of eye is a term that refers to a region of interest (ROI) associated with the eye, such as an iris, a pupil, an eyeball, an eyelash, Eyebrows, double skin, and the like, and may be used as a term including a region around various other eyes.

1 is a block diagram illustrating an example of an electronic device configuration, in accordance with various embodiments of the present invention. Referring to FIG. 1, the electronic device 100 may include a control unit 110, a camera unit 120, and a storage unit 130.

The control unit 110 may include at least one of an eye region detection unit 111, a reference point determination unit 112, an eye region division unit 113, a feature point determination unit 114, have.

The eye region detecting unit 111 can detect an eye region in the image. For example, the image may be stored in the electronic device 100 or may be photographed through the camera unit 120, and may be transmitted to the electronic device 100 from outside.

According to various embodiments of the present invention, the eye region detecting unit 111 may check the image obtained by binarizing the image and inverting the color of the image.

The reference point determination unit 112 can set a reference point in the eye region detected through the eye region detection unit 111. [ For example, the set reference point may be reset from the center of the generated circle according to a result of comparison between the center of the circle generated in the detected eye area and the reference point.

According to various embodiments of the present invention, when the center of the generated circle is not located within the error range from the reference point, the reference point determination unit 112 can reset the center of the generated circle as a reference point have. For example, the operation of resetting the reference point may be repeated according to a preset number of times.

According to various embodiments of the present invention, the reference point determination unit 112 may set a reference point in consideration of a pixel value, a radius of the eye region, or a Gaussian weight according to the radius in the detected eye region. For example, the reference point may be set to a point adjacent to the center of the eye using information related to the morphological characteristics of the eye.

The eye region division unit 113 may divide the detected eye region based on the reference point set through the reference point determination unit 112. [ For example, the eye region dividing unit 113 may divide the detected eye region into 360 regions at intervals of 1 degree.

The feature point determination unit 114 can determine a feature point in each of the eye regions divided through the eye region division unit 113. [ For example, the feature point may be selected for each of the segmented eye regions among the edge points of the reference circle corresponding to the eye region.

According to various embodiments of the present invention, the feature point determination unit 114 may divide the feature points into at least one cluster. For example, the cluster may include feature points located within a certain distance.

According to various embodiments of the present invention, the feature point determination unit 114 generates a circle by a combination of each of the clusters, and the average pixel value in the circle among the generated circles is low, A combination of the best clusters generating a circle with a high slope average can be selected.

The center-of-eye determination unit 115 may determine the center of the eye by comparing the center of the circle generated using the feature points with the reference point. For example, when the center of the generated circle is located within a preset range from the reference point (e.g., Euclidean distance is 1), the center of the generated circle can be determined as the center of the eye.

The camera unit 120 can take an image.

According to various embodiments of the present invention, the eye area may be identified in an image photographed through the camera unit 120, and the electronic device 100 may determine the center of the eye.

The storage unit 130 stores eye area detection information 131, reference source determination information 132, and the like. The eye center determination function information 133 or the image information 134 can be stored.

The eye area detection information 131 may include information for detecting the eye area. For example, the information for detecting the eye region may include the morphological characteristic of the eye or the image characteristic of the eye.

The reference circle determination information 132 may include information for determining a circle corresponding to the iris in the eye region. For example, the reference circle determination information 132 may determine that a region having a large pixel value in the detected eye region and located in the center of the detected eye region corresponds to the iris.

The eye center determination function information 133 may include functions that can be used to determine the center of the eye in the detected eye region.

The image information 134 may include images photographed through the camera unit 120. [

For example, the electronic device 100 according to various embodiments of the present invention may include a camera module (e.g., a camera section 120) that captures an image, a camera module 120 that detects an eye region from the image, (E.g., the control unit 110) that determines the center of the eye by comparing the center of the circle generated from the detected eye region with the reference point.

The control unit according to various embodiments of the present invention may determine whether the center of the generated circle is located within a preset range from the reference point.

According to various embodiments of the present invention, when the center of the generated circle is located within a certain range from the reference point, the center of the generated circle may be determined as the center of the eye.

The control unit according to various embodiments of the present invention can reset the center of the generated circle to the reference point when the center of the generated circle is not located within a certain range from the reference point.

The control unit according to various embodiments of the present invention can determine whether to reset the reference point according to the number of times of performing the operation of determining whether the center of the generated circle is located within a predetermined range from the reference point .

According to various embodiments of the present invention, the controller divides the detected eye region based on the reference point, and calculates a feature point of each of the divided regions among the points included in the edge of the detected eye region You can choose.

According to various embodiments of the present invention, the control unit may extract points located within a predetermined distance from the reference point among the selected feature points, and generate a circle using the extracted points. The generated circle may be a circle generated using the extracted points. The reference point may be selected as a point in the detected eye region according to at least one pixel value associated with the detected eye region or a radius of the detected eye region.

2 is a flow chart illustrating an example of an operation of determining the center of an eye in an electronic device, in accordance with various embodiments of the present invention. Referring to FIG. 2, at 210 operation, the electronic device may detect an eye region in an image.

In operation 220, the electronic device may determine a reference point in the detected eye region.

In operation 230, the electronic device can determine the center of the eye by comparing the reference point with the center of the circle generated from the detected eye region.

For example, a method for determining the center of an eye in an electronic device according to various embodiments of the present invention includes: detecting an eye region from an image; determining a reference point in the detected eye region; And comparing the center of the generated circle with the reference point to determine the center of the eye.

For example, a method for determining the center of an eye in an electronic device according to various embodiments of the present invention includes: determining whether the center of the generated circle is located within a preset range from the reference point; Determining the center of the generated circle as the center of the eye when the center of the generated circle is located within a certain range from the reference point; Resetting the center of the generated circle to the reference point if the center of the generated circle is not located within a certain range from the reference point; Determining whether to reset the reference point according to the number of times of performing the operation of determining whether the center of the generated circle is located within a predetermined range from the reference point; Dividing the detected eye region based on the reference point and selecting a feature point for each of the divided regions among the points included in the edge of the detected eye region; Extracting a point located within a predetermined distance from the reference point among the selected feature points and generating a circle using the extracted point; Lt; RTI ID = 0.0 > 1, < / RTI >

For example, the generated circle according to various embodiments of the present invention may be generated using the extracted points.

For example, the reference point according to various embodiments of the present invention may be selected as a point in the detected eye region, depending on at least one pixel value associated with the detected eye region or a radius of the detected eye region .

3 is a flow chart illustrating an example of an operation of determining the center of an eye in an electronic device, in accordance with various embodiments of the present invention. Referring to FIG. 3, in operation 220, the electronic device may determine a reference point.

In operation 310, the electronic device may divide the circle created from the eye region.

In operation 320, the electronic device may select points for each of the divided regions of the generated circle edge points. For example, the selected points may include one of the edge points that is farthest from the reference point in each of the divided areas.

In operation 330, the electronic device may generate a circle using the selected points.

In operation 340, the electronic device may compare the center of the generated circle with the reference point.

In operation 350, the electronic device can determine the center of the eye based on the comparison result.

4 is a flow chart illustrating an example of an operation of determining the center of an eye in an electronic device, in accordance with various embodiments of the present invention. Referring to FIG. 4, the electronic device performs the above-described operation 340 and, in operation 410, can verify that the center of the generated circle is located within a certain range from the reference point.

If, as a result of the operation 410, it is determined that the center of the generated circle is not located within a certain range, the electronic device can reset the center of the generated circle to the reference point in operation 430. The electronic device may then perform the 310 operations described above.

If it is determined that the center of the generated circle is located within a certain range as a result of the operation 410, the electronic device can confirm the center of the generated circle at the center of the eye in operation 420.

5 is a diagram illustrating an example of an operation of detecting an eye region in an image and determining a reference point, in accordance with various embodiments of the present invention. Referring to FIG. 5, the electronic device can identify an image in which the eye 501 is photographed.

In 510 operation, the electronic device may convert the color of the image to monotone.

In operation 520, the electronic device may invert the color of the image converted to the monotone.

In operation 530, the electronic device may determine the center of the eye based on the inverted region 502. For example, the electronic device can identify a portion of the eye region within the white processed region 502 and set the reference point 503 in the eye region.

According to various embodiments of the present invention, the reference point may be a point representing the approximate center of the eye.

Figures 6A and 6B are diagrams illustrating various examples of operations for detecting an eye region in an image according to various eye shapes, in accordance with various embodiments of the present invention.

According to various embodiments of the present invention, an electronic device can color invert and binarize an image to detect an eye region in the image. For example, an electronic device can detect an eye region using a morphological opening technique. The morphological processing technique may include processing each feature point largely so that the feature points selected in the image can be grouped together and displayed as a single area.

According to various embodiments of the present invention, an electronic device may binarize an image that includes a detected eye region. For example, as the pixel value of the specific position is included in the predetermined range, the pixel value of the pixel may be processed as a pixel value related to white or black.

Referring to FIG. 6A, in the image, the eye may be covered with an eyelid and half-looking. In operation 610, the electronic device may invert the color of the captured image of the eyelid-covered eye. In operation 620, the electronic device can identify the eye region 601 by binarizing the inverted color image. For example, the eye region 601 may be covered with an eyelid and displayed in the form of a semicircle.

Referring to FIG. 6B, in the image, the eye may be in the form of glasses. In operation 610, the electronic device may reverse the color of the photographed image of the eyeglass-written eye. In operation 620, the electronic device can identify the eye region 602 by binarizing the inverted color image. For example, the rims of the glasses may be darkened as the colors are inverted, and may be processed as black as they are binarized. For example, the eye region 602 may be an iris region of the eye from which the rim of the eyeglasses is removed.

7 is a diagram illustrating an example of an operation of determining the center of an eye in an image, according to various embodiments of the present invention. Referring to Fig. 7, in 710 operation, an electronic device may obtain a partial image including an eye region in an image.

In operation 720, the electronic device may convert the color of the image to a motto tone and set a reference point 701 in the eye region included in the image.

In operation 730, the electronic device can reverse the color of the tone-transformed image and identify the eye region 702.

In operation 740, the electronic device may divide the eye region into at least two regions with respect to the reference point. For example, the eye region may be divided into eight regions.

In operation 750, the electronic device may select feature points for each of the segmented eye regions 702.

In operation 760, the electronic device can identify the selected feature points.

In operation 770, the electronic device may generate the circle 704 using the selected feature points.

In operation 780, the electronic device can identify the center 705 of the generated circle 704.

In operation 790, the electronic device can determine the center of the eye by comparing the center 705 of the generated circle 704 with the reference point 701. For example, if the center 705 of the generated circle 704 is within a predetermined range from the reference point 701, then the electronic device determines the center 705 of the generated circle 704 as the center of the eye .

According to various embodiments of the present invention, when the center 705 of the generated circle 704 is not included within a predetermined range from the reference point 701, Reset the center 705 to a reference point, and perform the 740 operation. The operation of resetting the reference point may be repeated a predetermined number of times.

Figure 8 is an illustration of an example of an operation for determining a reference point in an image, in accordance with various embodiments of the present invention. Referring to FIG. 8, the electronic device can identify the iris 810 in the eye region detected in the image. For example, the iris 810 may be a circular region including the largest pixel value in the image in which the eye is photographed.

In accordance with various embodiments of the present invention, an electronic device may include a plurality of points ( xi _, i? {1, ..., N}) including a position c and a gradient of any pixel in the iris 810 _, ) Can be confirmed. For example, the electronic device is a vector ((up to the x _i at the position (c) of the arbitrary pixel d _i: normalized orientation vector) and all of the pixels (x _i) the normal vector (g _i in each: normalized gradient vector ), And calculate the sum of inner products between the vectors (normalized vectors).

According to various embodiments of the present invention, the electronic device may calculate a gaussian weight (Gaussian weight) according to the sum of the calculated dot products, a pixel value, a radius r of the iris 810, , The position c of the pixel calculated as the maximum value can be set as the reference point c ^* . For example, the reference point c ^* may be calculated based on the following equation (1).

Equation 1 is an equation for calculating the position of a reference point in the eye region, according to various embodiments of the present invention.

,

이다. here

,

to be.

In accordance with various embodiments of the present invention, electronic devices may be used in areas that are represented by high pixel values but are not related to the eye center (e.g., pixels with high pixel values), considering pixel values as well as Gaussian weights along the detected eye area radius r Eye corners, hair, eyebrows, spectacles, etc.) can be judged as noise. Thus, the electronic device can determine a reference point for an eye region that is associated with the eye center excluding the noise.

9 is a diagram illustrating an example of an operation for selecting a feature point based on a reference point in the eye region, according to various embodiments of the present invention. Referring to FIG. 9, the electronic device can identify the eye region 902 in the image and set the reference point 901 in the eye region 902. For example, the reference point 901 may be set similar to the reference point c ^{* in} FIG.

According to various embodiments of the present invention, in 910 operation, the electronic device may invert the color of the image.

According to various embodiments of the present invention, in 920 operation, the electronic device may divide the eye region 910 into n regions based on the reference point 901.

According to various embodiments of the present invention, in 930 operation, the electronic device can select feature points for each segmented region. For example, the electronic device may calculate the sum of the inner product of a vector d _i from position c to x _i and a normal vector g _i at x _i in the first divided area 911, And the point calculated by this maximum value can be selected as the characteristic point in the corresponding divided area. For example, the characteristic point p _n in the n-th divided area can be calculated using the following equation (2).

, seed는 기준 점(c ^*)의 위치 좌표이다.here

, and seed is the position coordinate of the reference point ( c ^* ).

Referring to Fig. 9, the feature points selected in each divided region may be selected at the edge of the eye region but selected in the area covered by the eyelid or not related to the eye region by a shadow around the eye region.

According to various embodiments of the present invention, only the region of the selected feature point that is not related to the eye region may be clustered. This will be described later with reference to FIG.

10 is a diagram illustrating an example of an operation of determining the center of an eye according to various embodiments of the present invention. Referring to FIG. 10, the electronic device may convert the color of the image to monotone and determine the center of the eye in the converted image.

In operation 1010, the electronic device may set a reference point 1001 in an image that includes an eye region, and may select feature points (e.g., 1002) based on the reference point 1001. For example, the feature points (e.g., 1002) may be selected corresponding to each of the eye regions divided based on the reference point 1001. [

In accordance with various embodiments of the present invention, in an instance such as when the iris is occluded by the eyelid, in order to prevent the extraction of feature points that are not relevant to the center of the eye, the electronic device in 1020 operation can extract the feature points have.

In operation 1020, the electronic device may divide the feature points 1002 into clusters (e.g., 1021, 1022, 1023, or 1024) of feature points each located within a certain distance. The clusters may be divided into an inlier cluster and an outlier cluster. For example, the clusters can be classified into internal or external clusters according to the position of a specific cluster based on the edge of the iris or the number of feature points included in the cluster.

According to various embodiments of the present invention, the electronic device may determine 1022 clusters that include less than a predetermined number of feature points as noise.

According to various embodiments of the present invention, an electronic device may include more than half of all feature points, or may divide a cluster including the greatest number of feature points of clusters into inner clusters.

In accordance with various embodiments of the present invention, when there is no cluster that contains more than half of all the feature points of the clusters (e.g., 1021, 1022, 1023, or 1024) , 1023, or 1024) (e.g., 2 ⁴ -1 = 15).

According to various embodiments of the present invention, a combination of the best clusters (C _best ) that produces circles with low average pixel values in the circle and high slope averages of the points of the circle out of the circles generated by the combination of the clusters You can choose. For example, such a combination of clusters can be selected using Equation (3) below.

In operation 1030, the electronic device creates a circle fitting 1031 using the feature points included in the cluster combination (e.g., 1023) selected through Equation (3) above and the center of the generated circle 1031 1032).

In operation 1040, the electronic device can verify that the center 1032 of the generated circle 1031 is within a predetermined range from the reference point 1001. [ According to the confirmation result, the electronic device can determine the center of the eye.

If the center 1032 of the circle 1031 is found not to be located within a predetermined range from the reference point 1001, then the electronic device is moved to the center 1032 of the circle 1031, Can be reset to the reference point. For example, the operation of resetting the reference point may be performed in such a manner that the center of the generated circle is included in a predetermined range from the reference point or it is repeated a predetermined number of times.

In operation 1050, the electronic device may divide the eye region based on the reset reference point 1032 and identify feature points 1051 for the divided regions.

In operation 1060, the electronic device identifies at least one cluster (e.g., 1061, 1062, 1063, or 1064) for the feature points 1051, The cluster of points 1062 can be identified with noise.

In operation 1070, the electronic device generates a circle 1072 using at least one of the remaining feature clusters (e.g., 1061, 1063, or 1064) except for the cluster 1062 identified with the noise, The center 1073 of the center point 1072 can be confirmed.

In accordance with various embodiments of the present invention, the electronic device may be configured to select one of the combinations of clusters (e.g., 1061, 1063, or 1064), a best cluster having a low average pixel value in the circle and a high slope average (1071) can be selected. For example, the circle 1071 may be generated as feature points included in the combination 1017 of clusters.

In operation 1080, the electronic device can verify that the center 1073 of the generated circle 1072 is located within a predetermined range from the reset reference point 1032. For example, if it is determined that the center 1073 of the generated circle 1072 is located within a preset range from the reset reference point 1032, the electronic device determines whether the center 1073 of the generated circle 1072 The position can be determined as the center of the eye.

For example, referring to FIG. 10, the electronic device determines an eye region in an image, sets a reference point in the eye region, and repeats the operation of resetting the center of the circle generated for the set reference point to a reference point , The center of the eye can be judged.

11 is a diagram showing an example of an eye for determining the center of an eye according to various embodiments of the present invention. Referring to FIG. 11, the electronic device can set a reference point 1111 and extract feature points 1110 in the eye region.

The electronic device may identify the feature points 1110 into clusters, identify at least one cluster 1112 that includes more than half of all feature points, and remove at least one feature point that is determined to be noise .

The electronic device can identify the best cluster combination 1115 using the at least one cluster 1112 and generate the circle 1114 using the cluster combination 1115. [

According to various embodiments of the present invention, the center of the eye may be determined by comparing the reference point 111 with the center of the generated circle.

Table 1 shows the results of correcting the center of the eye according to the method according to various embodiments of the present invention.

Way e? 0.03 e? 0.05 e? 0.10 e? 0.15 V method 26.42% 54.53% 70.85% 79.40% C method 67.48% 81.44% 88.94% 89.22% T method 53.64% 82.84% 98.30% 98.86% Invention 68.44% 86.32% 98.05% 98.86%

Referring to Table 1 above, e is an error between the center of the actual eye and the center of the eye determined according to various embodiments of the present invention. E can be calculated by the following equation (4).

Referring to Table 1, the V method is described in Valenti, R. Valenti, N. Sebe, and T. Gevers, "Combining head pose and eye location information for gaze estimation," IEEE Trans. Image Process . 21, no. 2, pp. 802-815, Feb. 2012), and the C method is described in Choi's paper (K. Choi, et al., "A novel iris center localization method based on the (ICCE), 2013 IEEE International Conference on., IEEE, 2013, which is incorporated herein by reference in its entirety. Center of Eye Correction method disclosed in Barth, " Accurate Eye Center Localization by Means of Gradients, " Proc. Sixth Int'l Conf. Computer Vision Theory and Applications, 2011).

는 왼쪽 눈에 대해서, 실제 눈의 중심과 판단된 눈의 중심과의 차이,

는 오른쪽 눈에 대해서, 실제 눈의 중심과 판단된 눈의 중심과의 차이,

는 왼쪽과 오른쪽 눈의 실제 거리이다. here

For the left eye, the difference between the center of the actual eye and the center of the determined eye,

For the right eye, the difference between the center of the actual eye and the center of the determined eye,

Is the actual distance between the left and right eyes.

Experimentally, e <0.1 represents the intra-iris region, e <0.05 represents the intra-pupillary region, and e <0.03 represents the accuracy close to the center of the actual eye.

<0.03)으로 보정해 줄 수 있음을 확인할 수 있다. According to various embodiments of the present invention, when the seed point set as the approximate center of the eye is positioned inside the iris (e < 0.1), by performing the operation of resetting the reference point, Center of the eye (

&Lt; 0.03). &Lt; / RTI &gt;

12 is a block diagram illustrating an example of an electronic device configuration according to various embodiments of the present invention. The electronic device 1201 may constitute all or part of the electronic device 100 shown in Fig. 1, for example. 12, the electronic device 1201 includes one or more processors (e.g., an application processor (AP) 1210), a communication module 1220, a subscriber identification module (SIM) card 1224, An input module 1250, a display 1260, an interface 1270, an audio module 1280, a camera module 1291, a power management module 1295, a battery 1296, An indicator 1297, and a motor 1298.

The AP 1210 may control a plurality of hardware or software components connected to the AP 1210 by driving an operating system or an application program, and may perform various data processing and operations including multimedia data. The AP 1210 may be implemented as a system on chip (SoC), for example. According to one embodiment, the AP 1210 may further include a graphics processing unit (GPU) (not shown).

According to various embodiments of the present invention, the AP 1210 may detect an eye region in an image. For example, the image may be stored in the memory 1230 of the electronic device 1201, taken through the camera module 1291, or transmitted from outside via the communication module 1220.

In accordance with various embodiments of the present invention, the AP 1210 can morph or invert the color of the acquired image and identify the acquired image by binarizing the image.

According to various embodiments of the present invention, the AP 1210 may set a reference point in the detected eye region. For example, the set reference point may be reset from the center of the generated circle according to a result of comparison between the center of the circle generated in the detected eye area and the reference point. For example, if the center of the generated circle is not located within an error range from the reference point, the AP 1210 can reset the center of the generated circle to a reference point. The operation of resetting the reference point may be repeated according to a preset number of times.

According to various embodiments of the present invention, the AP 1210 may set a reference point in the detected eye region by considering the pixel value, the radius of the eye region, or the Gaussian weight according to the radius. For example, the AP 1210 may divide the detected eye region based on the set reference point.

According to various embodiments of the present invention, the AP 1210 may determine a feature point in each of the segmented eye regions. For example, the AP 1210 may divide the feature points into at least one cluster. For example, the AP 1210 may generate a circle with a combination of each of the clusters, and generate a circle having a low average pixel value in the circle among the generated circles and a high slope average of the points of the circle edges A combination of clusters can be selected.

According to various embodiments of the present invention, the AP 1210 may determine the center of the eye by comparing the center of the circle generated using the feature points with the reference point. For example, when the center of the generated circle is located within a preset range from the reference point (e.g., Euclidean distance is 1), the center of the generated circle can be determined as the center of the eye.

The communication module 1220 may perform data transmission and reception in communication between the electronic device 1201 (e.g., the electronic device 100) and other electronic devices connected via a network. According to one embodiment, the communication module 1220 includes a cellular module 1221, a Wifi module 1223, a BT module 1225, a GPS module 1227, an NFC module 1228, and a radio frequency (RF) module 1229).

The cellular module 1221 may provide voice, video, text, or Internet services over a communication network (e.g., LTE, LTE-A, CDMA, WCDMA, UMTS, WiBro or GSM). The cellular module 1221 may also perform identification and authentication of electronic devices within the communication network using, for example, a subscriber identity module (e.g., SIM card 1224). According to one embodiment, the cellular module 1221 may perform at least some of the functions that the AP 1210 may provide. For example, the cellular module 1221 may perform at least some of the multimedia control functions.

According to one embodiment, the cellular module 1221 may include a communication processor (CP). In addition, the cellular module 1221 may be implemented with an SoC, for example. 12, components such as the cellular module 1221 (e.g., communication processor), the memory 1230, or the power management module 1295 are shown as separate components from the AP 1210, According to an embodiment, the AP 1210 may be implemented to include at least a portion of the aforementioned components (e.g., cellular module 1221).

According to one embodiment, the AP 1210 or the cellular module 1221 (e.g., a communications processor) may load or read commands or data received from at least one of non-volatile memory or other components connected thereto, load. In addition, the AP 1210 or the cellular module 1221 may store data generated by at least one of the other components or received from at least one of the other components in the non-volatile memory.

Each of the Wifi module 1223, the BT module 1225, the GPS module 1227 or the NFC module 1228 includes a processor for processing data transmitted and received through a corresponding module . Although the cellular module 1221, the Wifi module 1223, the BT module 1225, the GPS module 1227 or the NFC module 1228 are shown as separate blocks in FIG. 12, according to one embodiment, At least some (e.g., two or more) of the wireless module 1221, the Wifi module 1223, the BT module 1225, the GPS module 1227 or the NFC module 1228 may be included in one integrated chip (IC) have. At least some of the processors (e.g., cellular module 1221) corresponding to each of cellular module 1221, Wifi module 1223, BT module 1225, GPS module 1227 or NFC module 1228, ) And a Wifi processor corresponding to the Wifi module 1223) may be implemented as one SoC.

The RF module 1229 can transmit and receive data, for example, transmit and receive RF signals. The RF module 1229 may include, for example, a transceiver, a power amplifier module (PAM), a frequency filter, or a low noise amplifier (LNA). The RF module 1229 may further include a component for transmitting and receiving electromagnetic waves in free space in a wireless communication, for example, a conductor or a conductor. 12 shows that the cellular module 1221, the Wifi module 1223, the BT module 1225, the GPS module 1227 and the NFC module 1228 share one RF module 1229, At least one of the cellular module 1221, the WiFi module 1223, the BT module 1225, the GPS module 1227 or the NFC module 1228 transmits and receives an RF signal through a separate RF module can do.

The SIM card 1224 may be a card containing a subscriber identity module and may be inserted into a slot formed at a specific location in the electronic device. The SIM card 1224 may include unique identification information (e.g., an integrated circuit card identifier (ICCID)) or subscriber information (e.g., international mobile subscriber identity (IMSI)).

The memory 1230 (e.g., the storage unit 130) may include an internal memory 1232) or an external memory 1234. The built-in memory 1232 may be a nonvolatile memory such as a dynamic RAM (DRAM), a static RAM (SRAM), a synchronous dynamic RAM (SDRAM), or the like, Such as one time programmable ROM (OTPROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, NAND flash memory, And may include at least one.

According to one embodiment, the internal memory 1232 may be a solid state drive (SSD). The external memory 1234 may be a flash drive such as a compact flash (CF), a secure digital (SD), a micro secure digital (SD), a mini secure digital (SD), an extreme digital A Memory Stick, and the like. The external memory 1234 may be functionally connected to the electronic device 1201 through various interfaces. According to one embodiment, the electronic device 1201 may further include a storage device (or storage medium) such as a hard drive.

The sensor module 1240 may measure a physical quantity or sense an operating state of the electronic device 1201, and convert the measured or sensed information into an electrical signal. The sensor module 1240 includes a gesture sensor 1240A, a gyro sensor 1240B, an air pressure sensor 1240C, a magnetic sensor 1240D, an acceleration sensor 1240E, a grip sensor 1240F, A temperature sensor 1240G, a color sensor (e.g., an RGB (red, green, blue) sensor 1240H), a living body sensor 1240I, a temperature / humidity sensor 1240J, 1240M). &Lt; / RTI &gt; Additionally or alternatively, the sensor module 1240 may include, for example, an E-nose sensor (not shown), an EMG sensor (not shown), an EEG sensor (not shown) (Not shown), an iris sensor (not shown), or a fingerprint sensor (not shown). The sensor module 1240 may further include a control circuit for controlling at least one sensor included in the sensor module 1240.

The input device 1250 may include a touch panel 1252, a (digital) pen sensor 1254, a key 1256 or an ultrasonic input device 1258 . The touch panel 1252 can recognize a touch input by at least one of an electrostatic type, a pressure sensitive type, an infrared type, and an ultrasonic type, for example. In addition, the touch panel 1252 may further include a control circuit. In electrostatic mode, physical contact or proximity recognition is possible. The touch panel 1252 may further include a tactile layer. In this case, the touch panel 1252 may provide a tactile response to the user.

The (digital) pen sensor 1254 may be implemented using the same or similar method as receiving the touch input of the user, or using a separate recognition sheet. The key 1256 may include, for example, a physical button, an optical key or a keypad. The ultrasonic input device 1258 is a device that can confirm data by sensing a sound wave from a microphone (e.g., a microphone 1288) in the electronic device 1201 through an input tool for generating an ultrasonic signal, According to one embodiment, the electronic device 1201 may use the communication module 1220 to receive user input from an external device (e.g., a computer or a server) connected thereto.

The display 1260 may include a panel 1262, a hologram device 1264 or a projector 1266. The panel 1262 may be, for example, a liquid- crystal display) or AM-OLED (active matrix organic light-emitting diode), etc. The panel 1262 can be, for example, flexible, transparent or wearable The hologram device 1264 may display a stereoscopic image in the air using the interference of light. The hologram device 1264 may be a single module with the touch panel 1252. The projector 1266 can display an image by projecting light on the screen. The screen may be located, for example, inside or outside the electronic device 1201. According to one embodiment, The display 1260 may include a display panel 1262, a hologram device 1264, A control circuit for controlling the emitter (1266) may further include.

The interface 1270 may include a high-definition multimedia interface (HDMI) 1272, a universal serial bus (USB) 1274, an optical interface 1276, or a D- ) &Lt; / RTI &gt; The interface 1270 may, for example, be included in the communication interface 160 shown in FIG. Additionally or alternatively, the interface 1270 may be implemented with a mobile high-definition link (MHL) interface, a secure digital (SD) card / multi-media card (MMC) interface, or an infrared data association . &Lt; / RTI &gt;

The audio module 1280 can convert sound and electrical signals into both directions. The audio module 1280 may process sound information input or output through, for example, a speaker 1282, a receiver 1284, an earphone 1286, a microphone 1288, or the like.

The camera module 1291 can capture still images and moving images. According to one embodiment, the camera module 1291 may include one or more image sensors such as a front sensor or a rear sensor, a lens (not shown), an image signal processor (ISP) (Not shown) or a flash (not shown), such as an LED or xenon lamp.

The power management module 1295 may manage the power of the electronic device 1201. Although not shown, the power management module 1295 may include, for example, a power management integrated circuit (PMIC), a charger integrated circuit (PMIC), or a battery or fuel gauge.

The PMIC can be mounted, for example, in an integrated circuit or a SoC semiconductor. The charging method can be classified into wired and wireless. The charging IC can charge the battery, and can prevent an overvoltage or an overcurrent from the charger. According to one embodiment, the charging IC may comprise a charging IC for at least one of a wired charging scheme or a wireless charging scheme. The wireless charging system may be, for example, a magnetic resonance system, a magnetic induction system or an electromagnetic wave system, and additional circuits for wireless charging may be added, such as a coil loop, a resonant circuit or a rectifier have.

The battery gauge can measure, for example, the remaining amount of the battery 1296, the voltage during charging, the current or the temperature. The battery 1296 may store or generate electricity, and may supply power to the electronic device 1201 using the stored or generated electricity. The battery 1296 may include, for example, a rechargeable battery or a solar battery.

The indicator 1297 may indicate a specific state of the electronic device 1201 or a portion thereof (e.g., the AP 1210), for example, a boot state, a message state, or a charged state. The motor 1298 can convert an electrical signal into a mechanical vibration. Although not shown, the electronic device 1201 may include a processing unit (e.g., a GPU) for mobile TV support. The processing device for supporting the mobile TV can process media data conforming to standards such as digital multimedia broadcasting (DMB), digital video broadcasting (DVB), or media flow.

13 is a block diagram illustrating an example of a program module configuration according to various embodiments of the present invention. According to one embodiment, the program module 1310 includes an operating system (OS) for controlling resources associated with an electronic device (e.g., electronic device 100) and / or various applications running on an operating system E.g., an application program 137). The operating system may be, for example, android, iOS, windows, symbian, tizen, or bada.

13, the program module 1310 may include a kernel 1320, a middleware 1330, an application programming interface (API) 1360, and / or an application 1370. At least a portion of the program module 1310 may be preloaded on an electronic device or downloaded from a server.

The kernel 1320 may include, for example, a system resource manager 1321 or a device driver 1323. [ The system resource manager 1321 may perform control, assignment, or recovery of system resources. According to one embodiment, the system resource manager 1321 may include a process management unit, a memory management unit, or a file system management unit. The device driver 1323 may include, for example, a display driver, a camera driver, a Bluetooth driver, a shared memory driver, a USB driver, a keypad driver, a WIFI driver, an audio driver, or an inter- have.

The middleware 1330 may provide the functions commonly required by the application 1370 or may be provided by the API 1360 to allow the application 1370 to efficiently use limited system resources within the electronic device. ) To provide various functions to the application (1370). According to one embodiment, the middleware 1330 includes a runtime library 1335, an application manager 1341, a window manager 1342, a multimedia manager 1343, a resource manager 1344, a power manager 1345, a database manager 1346, a package manager 1347, a connectivity manager 1348, a notification manager 1349, a location manager 1350, a graphic manager 1351, or a security manager 1352.

The runtime library 1335 may include, for example, a library module used by the compiler to add new functionality via a programming language while the application 1370 is running. The runtime library 1335 may perform input / output management, memory management, or functions for arithmetic functions.

The application manager 1341 can manage the life cycle of at least one application among the applications 1370, for example. The window manager 1342 can manage GUI resources used in the screen. The multimedia manager 1343 recognizes a format required for playing various media files and can encode or decode a media file using a codec according to the format. The resource manager 1344 can manage resources such as a source code, a memory, and a storage space of at least one of the applications 1370.

The power manager 1345 operates in conjunction with a basic input / output system (BIOS) or the like to manage a battery or a power source and provide power information and the like necessary for the operation of the electronic device . The database manager 1346 can create, search, or change a database to be used in at least one of the applications 1370. The package manager 1347 can manage installation or update of an application distributed in the form of a package file.

The connection manager 1348 may manage wireless connections, such as WIFI or Bluetooth, for example. The notification manager 1349 may display or notify events such as arrival messages, appointments, proximity notifications, etc. in a manner that does not interfere with the user. The location manager 1350 may manage location information of the electronic device. The graphic manager 1351 may manage a graphical effect to be provided to the user or a user interface related thereto. The security manager 1352 may provide security functions necessary for system security or user authentication. According to one embodiment, when the electronic device (e.g., electronic device 100) includes a telephone function, the middleware 1330 may include a telephony manager for managing the voice or video call capabilities of the electronic device .

The middleware 1330 may include a middleware module that forms a combination of various functions of the above-described components. The middleware 1330 may provide a module specialized for each type of operating system to provide a differentiated function. In addition, the middleware 1330 may dynamically delete some existing components or add new components.

The API 1360 may be provided in a different configuration depending on the operating system, for example, as a set of API programming functions. For example, for Android or iOS, you can provide one API set per platform, and for tizen, you can provide more than two API sets per platform.

The application 1370 may include a home 1371, a dialer 1372, an SMS / MMS 1373, an instant message 1374, a browser 1375, a camera 1376, an alarm 1377 ), Contact 1378, voice dial 1379, email 1380, calendar 1381, media player 1382, album 1383 or clock 1384, health care (e.g., Or providing information on the environment (e.g., providing atmospheric pressure, humidity, or temperature information, etc.), and the like.

According to one embodiment, the application 1370 includes an application (hereinafter referred to as an &quot; information exchange application &quot;) for supporting information exchange between the electronic device (e.g., electronic device 100) . &Lt; / RTI &gt; The information exchange application may include, for example, a notification relay application for communicating specific information to the external electronic device, or a device management application for managing the external electronic device .

For example, the notification delivery application may transmit notification information generated by another application (e.g., an SMS / MMS application, an email application, a healthcare application, or an environment information application) of the electronic device to an external electronic device . Further, the notification delivery application can receive notification information from, for example, an external electronic device and provide the notification information to the user. The device management application may, for example, provide at least one function of the external electronic device in communication with the electronic device (e.g., turn-on / turn-off of the external electronic device itself (E.g., install, delete, or update) a service (e.g., a call service or a message service) provided by the external electronic device or an application running on the external electronic device.

According to one embodiment, the application 1370 includes an application (e.g., a healthcare application) designated according to the attributes of the external electronic device (e.g., the type of electronic device as the attribute of the electronic device) . According to one embodiment, the application 1370 may include an application received from an external electronic device. According to one embodiment, the application 1370 may include a preloaded application or a third party application downloadable from a server. The names of the components of the program module 1310 according to the illustrated embodiment may vary depending on the type of the operating system.

Each of the above-described components of the electronic device according to various embodiments of the present invention may be composed of one or more components, and the name of the component may be changed according to the type of the electronic device. The electronic device according to various embodiments of the present invention may be configured to include at least one of the above-described components, and some components may be omitted or further include other additional components. In addition, some of the components of the electronic device according to various embodiments of the present invention may be combined into one entity, so that the functions of the components before being combined can be performed in the same manner.

The term &quot; module &quot; as used in various embodiments of the present invention may mean a unit including, for example, one or a combination of two or more of hardware, software or firmware. A &quot; module &quot; may be interchangeably used with terms such as, for example, unit, logic, logical block, component or circuit. A &quot; module &quot; may be a minimum unit or a portion of an integrally constructed component. A &quot; module &quot; may be a minimum unit or a portion thereof that performs one or more functions. &Quot; Modules &quot; may be implemented either mechanically or electronically. For example, a &quot; module &quot; in accordance with various embodiments of the present invention may be implemented as an application-specific integrated circuit (ASIC) chip, field-programmable gate arrays (FPGAs) And a programmable-logic device.

According to various embodiments, at least a portion of a device (e.g., modules or functions thereof) or a method (e.g., operations) according to various embodiments of the present invention may be, for example, a computer readable And may be implemented with instructions stored on a computer-readable storage medium. When executed by one or more processors (e.g., the controller 110), the one or more processors may perform functions corresponding to the instructions. The computer-readable storage medium may be the storage unit 130, for example. At least a portion of the programming module may be implemented (e.g., executed) by, for example, the control unit 110. At least some of the programming modules may include, for example, modules, programs, routines, sets of instructions or processes, etc. to perform one or more functions.

The computer-readable recording medium includes a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc) A magneto-optical medium such as a floppy disk, and a program command such as a read only memory (ROM), a random access memory (RAM), a flash memory, Module) that is configured to store and perform the functions described herein. The program instructions may also include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the various embodiments of the present invention, and vice versa.

Modules or programming modules according to various embodiments of the present invention may include at least one or more of the elements described above, some of which may be omitted, or may further include other additional elements. Operations performed by modules, programming modules, or other components in accordance with various embodiments of the invention may be performed in a sequential, parallel, iterative, or heuristic manner. Also, some operations may be performed in a different order, omitted, or other operations may be added.

According to various embodiments of the present invention there is provided a storage medium having stored thereon instructions for causing the at least one processor to perform at least one operation when executed by at least one processor, Includes the steps of detecting an eye region from an image, determining a reference point in the detected eye region, comparing the center of the circle generated from the detected eye region with the reference point to determine the center of the eye Operation.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It is not intended to limit the scope. Accordingly, the scope of various embodiments of the present invention should be construed as being included in the scope of various embodiments of the present invention in addition to the embodiments disclosed herein, all changes or modifications derived from the technical ideas of various embodiments of the present invention.

Claims (18)

In an electronic device,
A camera module for photographing an image; And
And a controller for detecting an eye region from the image, determining a reference point in the detected eye region, and determining the center of the eye by comparing the center of the circle generated from the detected eye region with the reference point, Device. The method according to claim 1,
Wherein,
And determines whether the center of the generated circle is located within a predetermined range from the reference point. 3. The method of claim 2,
Wherein,
And when the center of the generated circle is located within a certain range from the reference point, the center of the generated circle is determined as the center of the eye. 3. The method of claim 2,
Wherein,
And resets the center of the generated circle to the reference point when the center of the generated circle is not located within a certain range from the reference point. 5. The method of claim 4,
Wherein,
And determines whether to reset the reference point according to the number of times of performing the operation of determining whether the center of the generated circle is located within a predetermined range from the reference point. The method according to claim 1,
Wherein,
Dividing the detected eye region based on the reference point and selecting feature points for each of the divided regions among the points included in the edge of the detected eye region. The method according to claim 6,
Wherein,
Extracting points located within a predetermined distance from the reference point among the selected feature points, and generating the extracted points using the extracted points. 8. The method of claim 7,
Wherein the generated circle is generated using the extracted points. The method according to claim 1,
The reference point,
Is selected as a point in the detected eye region according to at least one pixel value associated with the detected eye region or a radius of the detected eye region. A method for determining the center of an eye in an electronic device,
Detecting an eye region from the image;
Determining a reference point in the detected eye region; And
And determining the center of the eye by comparing the center of the circle generated from the detected eye region with the reference point. 11. The method of claim 10,
And determining whether the center of the generated circle is located within a predetermined range from the reference point. 12. The method of claim 11,
And determining the center of the generated circle as the center of the eye when the center of the generated circle is located within a certain range from the reference point. 12. The method of claim 11,
And resetting the center of the generated circle to the reference point if the center of the generated circle is not located within a certain range from the reference point. 14. The method of claim 13,
Determining whether to reset the reference point according to the number of times of performing the operation of determining whether the center of the generated circle is within a predetermined range from the reference point; How to judge. 11. The method of claim 10,
Dividing the detected eye region based on the reference point;
And selecting a feature point for each of the divided regions among the points included in the edge of the detected eye region. 16. The method of claim 15,
Extracting points among the selected feature points located within a predetermined distance from the reference point;
And generating a circle using the extracted points. &Lt; Desc / Clms Page number 20 &gt; 17. The method of claim 16,
Wherein the generated circle is a circle generated using the extracted points. 11. The method of claim 10,
The reference point,
Wherein the detected eye area is selected as a point in the detected eye area according to at least one pixel value associated with the detected eye area or a radius of the detected eye area.

Images