115 results about "Canthus" patented technology

The invention relates to a device for cutting the cornea of an eye to correct the refractive power thereof, having a frame that comprises a fixation ring, which may be drawn onto the eye, as well as a receptacle, which may be coaxially displaced relative to the fixation ring and which serves to accommodate an applanator for deforming the cornea within the fixation ring, and a holding device, which is guided on the frame in a plane that is perpendicular to the axis with regard to the fixation ring and which serves to hold a blade, which passes through the frame via a peripheral recess and which is mounted in front of the applanator, being radially displaceable relative to the fixation ring as well as movable around an axis perpendicular to the guiding plane, for the purpose of cutting a pocket through a merely tunnel-like entry into the corneal tissue. In order to obtain advantageous cutting conditions, it is suggested to have the blade pass through the frame recess with clearance, and to have the holding device support a vibrator for setting the blade in oscillatory motion in the cutting plane.

An apparatus for generating cut surfaces in the cornea of an eye in order to correct ametropia is provided, said apparatus comprising a laser unit, which can focus pulsed laser radiation into the cornea and move it therein in order to generate cut surfaces, and a control unit, which controls the laser unit for generating cut surfaces such that a predetermined lenticle to be removed is separated from the surrounding corneal material in the cornea by at least one cut surface, and that at least two mutually spaced apart cut surfaces are formed as opening cuts, each extending from the lenticle to the anterior corneal surface, the position and shape of the opening cuts being selected such that the opening cuts contribute to the correction of the ametropia of the eye or do not counteract the correction of the ametropia of the eye.

An eyeglass-type electroencephalogram interface system is worn on the head of a user. The system includes: an output section for presenting a visual stimulation to the user; an ear electrode portion disposed at a position coming in contact with an ear of the user when the system is worn; a facial electrode portion disposed at a position coming in contact with the face below a straight line connecting an external canthus and an internal canthus of an eye of the user, such that the mass of the system is supported at the position, when the system is worn; and an electroencephalogram measurement and determination section for measuring an event-related potential on the basis of a potential difference between the ear electrode portion and the facial electrode portion based on the visual stimulation being presented by the output section as a starting point.

The invention discloses a method for positioning and tracking outer contour feature points of key face organs and a device thereof, comprising the following steps: first, the positions of canthi points and angulus oris points on the face are obtained; the medial axis of the eyes and the mouth is identified based on the positions; the outer contour feature points of the eyes and eyebrows are identified on the medial axis of the eyes, and the outer contour feature points of the mouth are identified on the medial axis of the mouth. Consistent positioning and tracking of outer contour feature points of key face organs are conducted on such a basis. The technical proposal provided by the embodiment of the invention solves the problem of inaccurate positioning of outer contour feature points of eyes, mouth and eyebrows when people makes various faces; based on the positioning of the feature points, the existing two-dimensional and three-dimensional face models can be real-time driven, and face expressions and motions such as frowning, blinking and mouth opening of people before a camera can be real-time simulated, thus creating various real and vivid face animations.

The invention discloses a human eye positioning method. The human eye positioning method includes the steps of constructing two kinds of convolution kernels, wherein each kind of of convolution kernels comprises convolution kernels with different radii; cutting out eye area image parts on human face images, conducting convolution on the two kinds of convolution kernels with the different radii and the eye area images so as to obtain convoluted images, and dividing the two kinds of convoluted images so as to obtain a convolution factor matrix. The centers and the radii of the human eyes are obtained by calculating the position corresponding to the maximum value position of the factor matrix and the radii of the convolution kernels. The invention further discloses a sight estimation method based on human eye positioning. Human face feature points and head orientations of the human face images are calculated, so that the sight direction is finally determined in cooperation with human eye center coordinates, canthus coordinates and the head orientations. According to the human eye positioning method and the sight estimation method, the convolutions are calculated through the Fourier transformation, the gray values at the positions of the centers of the eyes are considered, interference of eyebrows, eyelids, glasses and illumination in positioning is reduced, the centers and the radii of the human eyes can be rapidly and accurately positioned, and the sight directions of the human eyes can be rapidly and accurately estimated.

A method based on VPF and improved SVSAN for locating the canthi and pupil in order to recognize human face, sex, expression, age, etc includes such steps as determining the horizontal coordinate of pupil center according to the maximum of VPF, determining the left and right boundaries of pupil (the diameter and radius of pupil) according to the positions of the maximal and minimal first-order derivative of VPF, matching the circle with template to obtain the circle center of pupil, and determining the positions of canthi according to improved SUSCAN operator.

The embodiment of the invention discloses a pupil center positioning method and a pupil center positioning device, which is used for positioning the pupil center quickly and accurately. The method disclosed by the embodiment of the invention comprises the steps of positioning an inner eye corner point of a target image, wherein the inner eye corner point an eye corner point at the near end of the nose in the horizontal direction; intercepting an eye region image in the target image according to the inner eye corner point; and calculating the gradient of pixel points in the eye region image according to difference in image gray scale of the eye region image, and determining the pupil center in the eye region image according to the gradient of the pixel points.

A fundus camera (10) obtains a retinal image using a light source (62), a ring aperture (58) conjugate to the cornea, and a first aperture (54) conjugate to the iris. An apertured mirror (52) redirects the ring illumination toward the eye. An objective lens (50) between the apertured mirror (52) and the eye has an entrance pupil between the iris and the cornea of the eye. The objective lens (50) directs the ring illumination into the pupil of the eye and directs a reflected image-bearing light from the retina through the apertured mirror (52). A second aperture (64), conjugate to a plane between the cornea and the iris of the eye, forms an aperture stop for the reflected image-bearing light. A third aperture (68) is conjugate to the cornea for blocking light reflected. A sensor (70) provides an image of the retina.

The invention provides a human-computer interaction method. The human-computer interaction method comprises the following steps of: (1), detecting key points of eyes including upper and lower eyelids, inner circles and outer circles of irises and pupil centres, fitting to obtain position information of boundaries of the upper and lower eyelids, canthus and boundaries of the inner circles and outer circles of the irises, and obtaining accurate pupils and iris centres through information of the inner circles and outer circles of the irises; (2), calculating the direction of eyeball sight, and, in combination with the position of the sight correspondingly on a display screen of virtual reality equipment, completing eyeball sight tracking; (3), performing stare/blink detection of eyeballs including stare detection and blink detection, if stare/blink detection is passed, entering the step (4), and otherwise, entering the step (5); (4), executing corresponding operations for specific stare items in stare detection, and then, returning to the step (1) to perform detection of the key points of the eyes; and (5), according to the eyeball sight direction, updating a display content of the virtual reality equipment, and then, returning to the step (1) to perform detection of the key points of the eyes.

A system for determining the surface shape of the cornea of an eye by analyzing the reflection of a spatially distributed ring pattern. The system includes an element for generating a ring pattern, an illuminating unit, an image capturing unit, and a control and analyzing unit. The element for generating rings is a fresneled axicon with annular structures of different radii. Furthermore, an optical element for illuminating the entire surface of the fresneled axicon with plane waves and an optical element for separating the illuminating and detecting beam path are arranged between the illuminating unit and the fresneled axicon. Furthermore, the image capturing unit consisting of an imaging system and an image sensor is designed for a telecentric distance-independent image detection.

A separator that includes a body and a leading edge portion. The leading edge portion includes an upper planar surface oriented at an angle ranging from approximately 40° to 90° relative to a horizontal plane and a lower planar surface oriented at an angle ranging from approximately 0° to 30° relative to the horizontal plane, wherein the upper planar surface and the lower planar surface intersect one another so as to define a blunt leading edge and the leading edge portion is made of a material that has a hardness so as to separate an epithelial layer of an eye from an cornea stroma of said eye without substantially damaging said epithelial layer and wherein said blunt leading edge is incapable of cutting said stroma.

The invention discloses a technique for accelerating the germination of flower seeds, and the technique comprises water soaking treatment and low-temperature treatment. The technique is characterized in that a method for the water soaking treatment and the low-temperature treatment comprises the following steps of: in the water soaking treatment, for cercis, snow willow and weigela, soaking the seeds for 1-2 days by using warm water at 40-60 DEG C, and then, sowing the seeds directly; for torch tree seeds, initially soaking the seeds by using water at 90 DEG C, and naturally cooling the seeds for 24 hours, so that seed coats with colloids and waxes are softened, absorb the water and then germinate, wherein in a soaking process, the water is necessarily changed frequently, and the time is not suitable to exceed 0.5-1 hour when the temperature of the water is higher than 60-90 DEG C; and in the low-temperature treatment, for roxburgh rose, calyx canthus, fructus forsythiae, clove and fall-sowed herb flowers, carrying out the low-temperature treatment at 0-10 DEG C necessarily on the seeds, mixing the seeds on which the low-temperature treatment is carried out with sand with the humidity of 60%, then loading the mixed seeds and sand in a plastic bag, fastening the mouth of the bag, putting the bag in a flowerpot, implanting the bag in an open field at a depth of 40-60 centimeters together with the flowerpot, or putting the seeds in a refrigerator at 3-5 DEG C for 60-90 days, and taking the seeds out to sow the seeds in a seed sowing process. The technique for accelerating the germination has a simple process and a high germination rate, is suitable for a plurality of flower seeds, and is economical and practical.

An image based human eye corner detection method and system in the field of image processing are disclosed. A rough eye region image and an eye corner region image are filtered by using a fixed template and are binarized with a threshold self-defining method; a similar eye corner point image and an eye white image in the rough eye region image are extracted; coordinate information of a most right point in the similar eye corner point image is utilized as a boundary; a communicated region corresponding to the right side of the boundary in a rough eye region binary image obtained in the second step is filtered away; a primary corrected rough eye region binary image is obtained; the primary corrected rough eye region binary image and the eye white image are combined; a secondary corrected rough eye region binary image is obtained; the relations between two largest communicated regions in an eye corner region binary image and the rough eye region binary image are calculated so as to obtain corresponding communicated regions of the two communicated regions in the rough eye region binary image; the relations between the two communicated regions and the communicated region of the secondary corrected rough eye region binary image are calculated; whether a rough eye region and an eye corner region need to be re-positioned is judged; and finally the eye corner region binary image is pruned and eye corner point information is output. With the adoption of the detection method and system, the eye corner detection can be effectively realized.

The invention discloses a method and a device for judging the left iris and the right iris in iris recognition, and belongs to the field of iris recognition. The method comprises the following steps: clipping a sub image containing the upper eyelashes and the canthus from an iris image; working out the upper eyelash intensity of the left side and the upper eyelash intensity of the right side of the sub image; comparing the upper eyelash intensity of the left side with the upper eyelash intensity of the right side of the sub image; and determining that the iris image is a right eye iris image if the upper eyelash intensity of the left side is higher than the upper eyelash intensity of the right side, or determining that the iris image is a left eye iris image. The method is simple and convenient, and is of high accuracy and a wide application scope.

The embodiment of the invention discloses an image fusion method and equipment, a storage medium and a terminal. The method comprises the following steps that: obtaining an iris area in an eye image,obtaining the prediction position of an iris circle center in the iris area, and obtaining a canthus position in the eye image; on a premise that the prediction position is constant, rotating a scanning line between the prediction position and the canthus position as a target angle to obtain boundary points on the boundary of the iris area; on the basis of an iris arc determined by the boundary points, obtaining the practical position of the iris circle center and the radius data of the iris area; and according to the practical position and the radius data, carrying out fusion on an iris material image and the eye image to generate a fused eye image. When the method is adopted, the fusion of the iris material image can be realized on the basis of iris positioning, the accuracy of an iris material fitting position is guaranteed, and a real-time beauty makeup effect is improved.

The invention discloses a moisturizing cosmetic capable of refining pores. The moisturizing cosmetic is prepared from the following components in parts by weight: 0.1-0.8 part of plant active ingredients, 60-66 parts of a surfactant, 8-12 parts of a humectant, 2-3 parts of an antistatic agent, 1-1.5 parts of a thickener, 0.3-0.5 part of a pH modifier, 0.3-0.4 part of a preservative and deionized water added to 100 parts. The moisturizing cosmetic is capable of providing the skin surface with moisture and maintaining normal vital movement of epidermis cells, so that formation of a healthy sebum membrane on the skin is facilitated and the moisture content of the skin is effectively kept; coarse pores can be converged and refined, the evaporation capacity of the moisture in the skin is reduced and the moisture content of the skin is kept, so that the skin is moisturized, fine lines of canthus are reduced, the phenomena of skin dryness and peeling, tension and cutaneous pruritus are improved, skin cells have certain wettability even if a cold and dry environment exists and the phenomenon of extreme hydropenia is avoided.

The invention provides a visible light cut-off film, a preparation method thereof and application. The visible light cut-off film comprises a substrate layer and an absorbing film system, wherein theabsorbing film system comprises one or more absorbing units; the absorbing units are arranged on one or two opposite surfaces of the substrate layer; each absorbing unit comprises a high refractive index material layer and a matching material layer contacted with the high refractive index material layer; the refractive index of the high refractive index material layer is 3 to 5.5; and the high refractive index material layer and the matching material layer form a structural water layer at the contact interface between the two. As the refractive index of the high refractive index material layeris 3 to 5.5, good absorption to ultraviolet light and visible light is thus achieved; the high refractive index material layer cooperates with the matching material layer, the structural water layeris formed on the contact interface between the two, the refractive index of the structural water layer is similar with that of water and is about 1.3, the structural water layer and the high refractive index material layer can form thin film interference towards visible light, ideal cut-off effects can be formed for ultraviolet light and visible light, and ideal transmission of infrared light canthus be achieved.