35results about How to "Corrected" patented technology

A beam hardening post-processing method that can improve the accuracy of channel-by-channel correction on a BH effect easily and yet taking a non-linear effect into account, phantoms of different diameters are disposed at a position offset from an imaging center to acquire projection information having a transmission length of an X-ray beam varying from view to view, hence, acquire projection information having a projection information value varying from view to view, for each channel, correction factors are determined, and a corrective function containing even a non-linear effect is determined by higher-order function fitting from the correction factors; and therefore, correction with high accuracy can be achieved in the channel-by-channel correction on the projection information values conducted after BH correction, and moreover, correction with high accuracy can be achieved using a smaller amount of phantom projection information, thus reducing the time for calibration work.

The present invention relates to an apparatus for orthopedic correction. The apparatus includes a body framework, a chair head part, a body part and a lower apparatus. A chair head rotary control part, an assistant chair head rotary control part, a chair control part and an assistant chair control part enable the chair and a chair head support part to locate on accurate origin positions when the chair recovers to the original state so that the orthopedic correction is more accurately. The orthopedic correction ability is improved by safely fixing the patient body through the body part.

The present invention relates to an apparatus for orthopedic correction. The apparatus includes a body framework, a chair head part, a body part and a lower apparatus. A chair head rotary control part, an assistant chair head rotary control part, a chair control part and an assistant chair control part enable the chair and a chair head support part to locate on accurate origin positions when the chair recovers to the original state so that the orthopedic correction is more accurately. The orthopedic correction ability is improved by safely fixing the patient body through the body part.

The invention discloses a text image rotation correction method and system. The text image rotation correction method at least includes: preprocessing the text image to be corrected to generate a binarized image; performing connected domain analysis on the binarized image to generate a character area , and extract the text line direction angle on the character area map; according to the text line direction angle, generate a text line angle histogram; according to the text line angle histogram, calculate the to-be-rotated angle of the text image to be corrected; according to the to-be-rotated angle, the The text image to be corrected is rotated and corrected. The present invention extracts the direction of the text line through the text aggregation characteristics in the image, and calculates the rotation angle. Compared with the situation where the edge of a single character area is unstable in the existing method, the rotation angle calculated by this method is more stable and more robust. Rodness, so as to obtain a more ideal corrected image, and the text image rotation correction method is simple and efficient in calculation, and can run even on smart terminals with average computing power.

The invention relates to the optical field, and provides an optical lens assembly. The optical lens assembly comprises a first lens, a second lens and a third lens which are coaxially and sequentially arrayed from an object space to an image space, wherein the first lens is provided with a convex first surface and a concave second surface, the second lens is provided with a third surface and a fourth surface, and the third lens is provided with a fifth surface and a six surface; all the surfaces are aspheric surfaces; the optical lens assembly satisfies the following conditions that: L / f is more than 1.1 and less than 1.35, f1 is more than 0, the absolute value of f / f1 is more than 0.5 and less than 1.2, f2 is more than 0, the absolute value of f2 / f is more than 0.9 and less than 2.2, f3 is less than 0, and the absolute value of f3 / f is more than 0.55 and less than 2.2, wherein f and L are effective focal length value and total length of the optical system respectively; and f1, f2 andf3 are effective focal lengths of the first, second and third lenses. The total length of the lens is shortened by adopting the three lenses and the combination of positive, positive and negative diopters; and each aberration is welled corrected so that good optical performance is obtained.

The invention relates to a design method for a novel multi-optical axis progressive multi-focal lens. Compared with traditional progressive multi-focal lenses, progressive lenses are designed in consideration of multiple optical axes; a plurality of progressive spherical or non-spherical small pupils are arranged on a lens; a focal power is correspondingly designed for the optical axis of each incoming lens corresponding to one spherical or non-spherical small pupil; and the front surface or the back surface of the whole progressive lens corresponding to the plurality of the spherical or non-spherical small pupils is integrally fitted. The mean-square deviation of the surface shape in each spherical or non-spherical small pupil relative to the spherical surface is greatly reduced, and in particular, blind areas in observable areas are greatly reduced relative to other progressive multi-focal lenses when eyes move side to side. Through the design method, actual use habits of human eyes are better combined and a visual function can be progressively and best corrected from a long distance, a middle distance and a near distance.

The invention belongs to the technical field of I-beam correction, in particular to a giant I-beam correction system. The system comprises a working frame body and a controller; the working frame is provided with a first correction unit and a second correction unit, the first correction unit includes a first double-shaft cylinder, a first cylinder and a first correction plate, and the first double-shaft cylinder and the first cylinder are electrically connected to the controller; the input end of the first double-shaft cylinder is fixedly connected with the side wall of the working frame body,and the input end of the first cylinder is fixedly connected to the output end of the first double-shaft cylinder; the first correction plate is fixedly connected to the output end of the first cylinder; the second correction unit comprises an electric push rod and a second correction plate, and electric push rods are symmetrically arranged with the center line in the vertical direction of the working frame body as a reference; the system has a novel design and can correct a giant I-beam in all directions.

The invention discloses an optical lens, comprising a first lens, a second lens and a third lens arranged coaxially. The surface of the first lens is a spherical surface; the surfaces of the second and the third lenses are non-spherical surfaces. The surfaces of the second and the third lenses meet the function (refer to the Figure): the optical lens satisfies the following relationship: 1.25<f / L<1.4, 0.5<f1 / f<0.8, f2<0 and 0.65<|f2 / f|<1, 1.3<f3 / f<1.6, in which f is the effective focus of the optical lens, f1 is the effective focus of the first lens, f2 is the effective focus of the second lens, f3 is the effective focus of the third lens and L is the total length of the optical lens with an air compensated distance. The optical lens of the invention has the advantages of good imaging quality, short total length, high illumination, large angle of field coverage, small emergence angle, minimum relative illumination over 50%, smart volume, light weight and nice optical performance.

The invention relates to a back bone corrector, and relates to a medical and mechanical appliance for correcting the bending of the back bone. The medical and mechanical appliance comprises a bottom seat, a longitudinal elevating mechanism, a lateral stretching mechanism, a horizontal adjusting press rod, left and right vertical adjusting mechanisms, left and right horizontal adjusting mechanismsand a pulse corrective arm. The longitudinal elevating mechanism is fixed on the bottom seat by a flange, the lateral stretching mechanism is firmly connected with the upper end of the longitudinal elevating mechanism, the other end of the lateral stretching mechanism is connected with the intermediate location of the horizontal adjusting press rod through an overarm brace, both ends of the horizontal adjusting press rod are respectively connected with the upper ends of the left and the right vertical adjusting mechanisms through upper connectors, the lower ends of the left and the right vertical adjusting mechanisms and the left and the right horizontal adjusting mechanisms are connected with the left stretching deflecting rod and the right stretching deflecting rod through lower connectors, the pulse corrective arm is connected with one end of the left stretching deflecting rod and the right stretching deflecting rod, and a correcting head is arranged at the lower end of the pulse corrective arm. The invention is characterized in that the structure is novel, the operation is simple, the curative effect is obvious, thereby, and the invention belongs to a novel back bone correctorintegrating with the economical efficiency and the practicability into a whole.