106 results about "Near sight" patented technology

An endoscope image is obtained by imaging a subject with a scope. Then, an edge portion of the endoscope image is extracted and a complexity degree of the edge portion is detected. Thereafter, a determination is made as to whether the endoscope image is an image obtained through near view imaging or distant view imaging according to the complexity degree and an imaging condition is changed according to the determined near view imaging or distant view imaging.

The invention relates to an optometer for comprehensively detecting diopter and visual function of eyes. The optometer comprises an optometry lifting table, a seat, a computer optometer, a control panel, a function control button, a function execution mechanism and a sighting target assembly, and is characterized in that the sighting target assembly comprises a front sighting target plate and a rear sighting target plate which are provided with sighting target windows, as well as a sighting target card with sighting targets, wherein, the front sighting target plate and the rear sighting target plate are suspended on a near sight test rod; and at least one group of the sighting targets among all the sighting targets are single sighting targets. The optometer further comprises an adjustment sensitivity checking device. The optometry method using the optometer mainly comprises the following steps: (1) diopter detection; and (2) visual function detection. The sighting targets in the structure are changed into single sighting targets so as to improve the judgment accuracy; and meanwhile results can be accurately and effectively checked by the added adjustment sensitivity checking device in a non-hand-held manner. Therefore, by adopting the optometry method, the diopter and the internal visual functional status of eyes can be more comprehensively checked so that the visual health state of eyes can be assessed comprehensively and a reasonable solution can be made further.

The present invention provides a PC vision-corrective polarizing lens consisted of a polarizing film and an optical substrate, wherein said polarizing film includes protection layer, PVA base and adhesive layer bonding on the surface of the PC optical substrate by injection-molding. The present invention with simple structure and widely adapting to near-sighted lens, far-sighted lens, presbyopia lens and gradual near-sighted lens and so on, not only corrects the poor vision, but also makes the visual object more clear under the cooperating of the polarizing function without visual-tire happened on the eyes.

The invention discloses a close-shot photography measurement system capable of realizing positioning and attitude determination and a close-shot photography measurement method capable of realizing positioning and attitude determination, belongs to the technical field of science of surveying and mapping, and particularly relates to a photography measurement technology. The system is subjected to real-time tracking and positioning by a prism mounted on a camera and a total station erected within a whole-visible range; a horizontal dial mounted below a holder at the bottom of the camera and a vertical dial mounted on the left side or right side of the camera are used for carrying out real-time attitude determination. By construction of a relation model of the prism, the horizontal dial, the vertical dial and the camera, positioning and attitude determination data are converted to the center of the camera, so that an image can be shot by the photography measurement, and information such as the position and attitude of the camera can be acquired. By use of a large-inclination-angle multi-base-line photography measurement algorithm and combination of line element and angle element initial values of the exterior orientation provided by a positioning and attitude determination system, large-inclination-angle and multi-base-line close-shot photography measurement can be quickly calculated; therefore, the efficiency and accuracy of image matching are improved, and the data processing precision is improved.

The invention relates to a new method for generating a vehicle-mounted driving assisting image. The new method aims at solving the problem that in a vehicle-mounted look-around system, the imaging effects of images of nearby views, distant views and three-dimensional objects on a virtual camera can not respectively have the perspective effect truth. According to the new method, it is proposed that the mapping relation between a practical camera and the virtual camera is built through a spherical virtual projective plane, several virtual camera placement modes are proposed according to different vehicle driving states, the burden that coordinate transformation needs to be carried out when a driver views images of the practical camera can be reduced through the virtual camera placement modes, and easily-identified vehicle surrounding images are also provided for the driver. In order to quicken the processing speed, a forward mapping table is proposed in the new method: firstly, a mapping table for mapping the images of the practical camera to the spherical virtual projective plane is built, then the mapping table is mapped to the spherical virtual projective plane again according to the position of the virtual camera, and therefore the forward mapping table for mapping the images of the practical camera to the images of the virtual camera is obtained.

The invention discloses a visual accommodation intervention machine and a visual training method. The visual accommodation intervention machine comprises a frame, a controller, a refraction lens set and a driving mechanism for driving the lens set. The controller is used for controlling the driving mechanism to drive the sliding directions, sliding speeds and sliding amplitudes of all lenses in the refraction lens set. The visual training method comprises the steps that the rotating direction, rotating speed and rotating time of a motor of the driving mechanism are controlled through the controller, the degree of the refraction lens set is adjusted to be increased and decreased within a certain range at certain speed, the situation that a far-sighted mode and a near-sighted mode are changed constantly is artificially simulated, intervention is given to the brain and eyes of a person, all muscle groups of the eyes are made to move, the brain is made to adapt to the relative changes of images, and therefore the eyes are relaxed without influencing normal eye use, and eyesight is improved.

The invention discloses a display device, a projection device and a near sight display device and a forming method thereof. The display device comprises a substrate, a semiconductor switch array, a plane light guide panel and a transmission light valve array, wherein the semiconductor switch array is positioned on the substrate; the plane light guide panel is positioned on the semiconductor switch array and comprises a transparent medium layer, and a light path deflection micro device and an electrical connector which are positioned in the transparent medium layer; the electrical connector iselectrically connected with the semiconductor switch array; the transmission light valve array is positioned on the plane light guide panel and is provided with a plurality of transmission light valves which are arranged to form an array; the electrical connector is also electrically connected with the transmission light valve array; the semiconductor switch array controls the opening and the closing of the transmission light valves by the electrical connector; light which is transmitted from the side of the plane light guide panel to the plane light guide panel is deflected by the light pathdeflection micro device, transmitted to the transmission light valve array and transmitted to the outside after passing through the transmission light valve array. Light modulation and display with high resolution can be realized in a limited area, and the display device is a novel transmission type micro display chip.

The invention discloses a DEM-based terrain sketch automatic drawing method, which comprises the following steps of 1, acquiring DEM data of a to-be-drawn terrain sketch area, and extracting terrain feature line elements in the area; 2, dividing the to-be-drawn area into a close shot area, a middle shot area and a distant shot area by taking the basin division line as a visual hierarchical division line; 3, reserving all topographic feature line elements of the close-range area; and only reserving the visual contour line of the middle scene area; calculating the area of a closed area defined by the visual contour lines in the distant view area, and selecting the visual contour line where the boundary of the first N closed areas with the maximum area is located as the terrain characteristicline element reserved in the distant view area; and 4, combining topographic feature line elements reserved in the near scene, the middle scene and the distant scene into a topographic sketch map. According to the method, the DEM is used for drawing the topographic sketch map, the automatic drawing of the sketch map is achieved, the topographic sketch map drawing technology is simplified, and thetopographic sketch map capable of reflecting rich geographical environments and topographic structures can be rapidly provided.

The invention relates to an optical system, a camera module and an electronic device. The optical system includes, in order from an object side to an image side: a first lens element with refractive power having an object-side surface being convex at an optical axis and an image-side surface being concave at the optical axis; a second lens element with refractive power, wherein the object-side surface of the second lens element is convex at the optical axis; a third lens element with refractive power, wherein the image-side surface of the third lens element is concave at the optical axis; a fourth lens element with positive refraction power, the object side surface of the fourth lens element being a concave surface at the optical axis, and the image side surface of the fourth lens elementbeing a convex surface at the optical axis; a fifth lens element with negative refraction power, the object side surface of the fifth lens element being a convex surface at the optical axis, and the image side surface of the fifth lens element being a concave surface at the optical axis. The relationship is satisfied: 1 < GLD/f < 5, wherein GLD is the maximum distance from the object side surfaceof the first lens element to the image side surface of the fifth lens element in the direction parallel to the optical axis, and f is the effective focal length of the optical system. The optical system not only has the characteristic of miniaturization, but also can improve the shooting effect on long shot and close shot.

The invention relates to a device for measuring the angle delta formed between a first position, corresponding to far sight, of a patient wearing a pair of spectacles, and a second position, corresponding to near sight, said device comprising: a recording means (22) for recording the orientation of the pair of spectacles in each of the two positions, and a processing means (30) for determining the angle delta as a function of said orientations, said device being characterized in that it comprises a visual reference element (26) for defining the attitude of the patient in far sight.

The embodiment of the invention discloses a people counting method and system in an image. The method comprises the following steps: dividing an original image into a distant view area and a close view area; for the distant view area, counting the number of people in the distant view area according to the density map of the human head; for the close view area, counting the number of people in theclose view area according to an object detection network model; and calculating the sum of the number of people in the long-range area and the number of people in the close view area to obtain the number of people in the original image. According to the embodiment of the invention, the method comprises the steps: setting parameters, according to the method, the depth information is used for cutting the distant-view area and the close view area of the image, the areas in the image are reasonably divided, and different methods are used for counting the number of people according to different characteristics of the distant-view area and the close view area, so that the total number of people in the output image is closer to a true value, and the method is particularly suitable for counting the number of people in a complex scene.

The invention discloses a multi-lens strabismus equal-resolution camera system, which comprises a fixed bracket, a first rotating rod, a second rotating rod, a camera shell and a lens assembly, wherein the first rotating rod is in the same direction as the fixed bracket and is rotationally connected with the fixed bracket; the second rotating rod is rotationally connected with the first rotating rod; the camera shell is rotationally connected with the second rotating rod; the lens assembly comprises a close-range lens, two middle-range lenses and three long-range lenses. According to the invention, 720-degree omnibearing real-time data acquisition can be carried out by using the plurality of zoom lenses in cooperation with the rotating bracket, particularly, an equal-resolution picture canbe acquired in a squint environment, and the technology can be applied to the fields of oblique photogrammetry, high-definition photography and the like.

The invention discloses a pair of glasses, which comprises a glasses framework, wherein an infrared distance measurer and a sounder are arranged on the glasses frame; the infrared distance measurer is used for measuring a distance from the glasses frame to a read object and is electrically connected with the sounder; and when the distance is smaller than or equal to a set value, the sounder sends a sound. The sounder can send the sound in a near-sight environment, so that a user can be reminded to keep a distance from eyes to the read object; and an aim of preventing myopia can be fulfilled.

The invention relates to a blind zone optimized progressive eye lens for and a mold thereof. The blind zone optimized progressive eye lens comprises a lens surface with certain radian, a far sight zone, a near sight zone, a channel, a left blind zone and a right blind zone, the cylindrical surface degree of the blind zones with maximum astigmatism is lower than the lighting degree of the lens, the maximum value of the cylindrical surface degree is controlled to be lower than 96% of the lighting degree value, and the distance of maximum astigmatism in the horizontal direction is greater than 22 mm. The cylindrical surface degree of the blind zones with maximum astigmatism is lower than the lighting degree and the position of the maximum value of the cylindrical surface degree is far away from the lens dispensing center, so that the sense of deformation of the middle distance is ensured to decline when a wearer looks at static objects or dynamic objects. The progressive lens disclosed by the invention can be applied to molded external progressive eye lenses, and can also be applied to internal progressive eye lenses manufactured in a free-from surface garage. The invention further relates to a glass mold or a metal mold for molded internal surface progressive eye lenses or external surface progressive eye lenses formed by hot melting or manufactured by the free-from surface grinding method.

The invention discloses a three-dimensional imaging module and a manufacturing method thereof. The three-dimensional imaging module comprises a sensor, a super lens and a motor, wherein the super lenscomprises a bearing layer and a plurality of sub-wavelength optical elements arranged on the bearing layer in an array mode, and the sub-wavelength optical elements are used for imaging to the sensor. The MEMS motor is used for driving the super lens to be far away from the sensor to shoot close shot or close to the sensor to shoot distant shot.

The invention provides a pair of adjustable glasses with double-layered lenses. The pair of adjustable glasses comprises a glasses frame 1, fixed lens cones 2, movable lens cones 3, lenses 4 and lenses 5, wherein each fixed lens cone 2 is a cylinder and is internally provided with one lens 4 in an embedded manner; each movable lens cone 3 is also a cylinder and is internally with one lens 5; each fixed lens cone 2 is provided with an outer thread and each movable lens cone 3 is provided with an inner thread; the outer threads are matched with the inner threads and the distance between each lens 4 and the corresponding lens 5 can be adjusted by rotating; each lens 4 is a concave lens and each lens 5 is a convex lens. When people go out to have a trip and need to view far scenes, the distance between each lens 4 and the corresponding lens 5 can be adjusted to form a telescope so as to have a panoramic view on beautiful mountains and rivers of China. When the people need to view near scenes, the distance between each lens 4 and the corresponding lens 5 can be adjusted to form a pair of common glasses; if a user is near-sighted, the distance between net glasses is adjusted to form a pair of glasses for the myopia. Therefore, one pair of glasses can be used as three types of glasses so as to meet the requirements of conveniently carrying in the travelling.