RU93055686A - METHOD FOR DEFECTOSCOPY OF EYE LENSES, DEVICE FOR DEFECTOSCOPY AND EVALUATION OF EYE LENSES - Google Patents

METHOD FOR DEFECTOSCOPY OF EYE LENSES, DEVICE FOR DEFECTOSCOPY AND EVALUATION OF EYE LENSES

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Publication number
RU93055686A
RU93055686A RU93055686/28A RU93055686A RU93055686A RU 93055686 A RU93055686 A RU 93055686A RU 93055686/28 A RU93055686/28 A RU 93055686/28A RU 93055686 A RU93055686 A RU 93055686A RU 93055686 A RU93055686 A RU 93055686A
Authority
RU
Russia
Prior art keywords
intensity
lens
pixels
eye lenses
defectoscopy
Prior art date
Application number
RU93055686/28A
Other languages
Russian (ru)
Inventor
Ибел Джеймс
Сайтс Питер
Original Assignee
Джонсон энд Джонсон вижн Продактс, Инк.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Джонсон энд Джонсон вижн Продактс, Инк. filed Critical Джонсон энд Джонсон вижн Продактс, Инк.
Publication of RU93055686A publication Critical patent/RU93055686A/en

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Claims (1)

Предлагается способ осуществления дефектоскопии глазных линз и устройство, содержащее камеру для фиксации изображения глазной линзы, которая освещается источником света. Положение и интенсивность каждого пиксела в камере преобразуется в электрическую величину, которая затем передается в память и хранится там. Компьютер, содержащий команды для сравнения значений интенсивности и положения, начинает обработку данных с центра поля рецептора и продолжает ее в направлении края поля до тех пор, пока не встретится отклонение интенсивности. В результате оценки пикселов, содержащих отклонения интенсивности, получают рисунок края линзы. Создается кольцо, включающее действительный край линзы. Абсолютные величины интенсивности всех пикселов изменяют на величины градиентов, представленные двумя переходными краями. Проводится выделение признаков для локализации дефектных пикселов и распределения их по группам. После определения групп каждой из них дается оценка, основанная на количестве, виде и серьезности дефекта пикселов, включенных в конкретную группу. Из этого результата можно получить взвешенную оценку для всей линзы, по которой принимается решение о пригодности или отбраковке линзы.A method for performing an inspection of eye lenses and a device comprising a camera for capturing an image of an eye lens that is illuminated by a light source are provided. The position and intensity of each pixel in the camera is converted to an electrical quantity, which is then transferred to memory and stored there. A computer containing commands for comparing intensity and position values starts processing data from the center of the receptor field and continues it in the direction of the field edge until an intensity deviation is encountered. As a result of evaluating pixels containing intensity deviations, a picture of the edge of the lens is obtained. A ring is created that includes the actual edge of the lens. The absolute values of the intensity of all pixels are changed by the values of the gradients represented by two transition edges. Features are selected to localize defective pixels and distribute them into groups. After determining the groups of each of them, an assessment is given based on the number, type and severity of the defect of the pixels included in the particular group. From this result, a weighted estimate can be obtained for the entire lens, according to which a decision is made on the suitability or rejection of the lens.
RU93055686/28A 1992-12-21 1993-12-20 METHOD FOR DEFECTOSCOPY OF EYE LENSES, DEVICE FOR DEFECTOSCOPY AND EVALUATION OF EYE LENSES RU93055686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US993,756 1992-12-21

Publications (1)

Publication Number Publication Date
RU93055686A true RU93055686A (en) 1996-10-20

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