109 results about "Near sight" patented technology

The invention is applicable to the field of machine visual and three-dimensional measurement and provides a target correction method and system. The embodiment of the invention provides the target correction method, comprising the following steps of: photographing a target from different angles to obtain a plurality of images; respectively extracting the center of a marking point in each image as a characteristic point and establishing a corresponding relation of the marking points with the same name between the images; combining a close-range photogrammetry technology to calculate a three-dimensional coordinate of the characteristic point, wherein the three-dimensional coordinate is restrained by a scale factor; finally obtaining the scale factor and zooming the three-dimensional coordinate of each characteristic point to an actual size. The target manufactured and corrected by the method has the advantages of higher precision, easiness for operation and low cost. Meanwhile, the scale factor is obtained by adopting a fringe projection measurement system and a standard ball, the correction precision is higher and the relative precision (absolute precision / target size) can reach 1:1000. Therefore, the method and the system provided by the invention can be widely applied to the vision measurement and the system calibration.

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 discloses an image collection device for correction of a dual-camera module and an application method of the image collection device. The application method comprises the following steps of (1) respectively rotating a first chart map, a second chart map and a third chart map according to a first deflection angle, a second deflection angle and a third deflection angle which are set in advance; (2) respectively moving the first chart map, the second chart map and the third chart map according to a first distance, a second distance and a third distance which are set in advance; and (3) sequentially shooting the first chart map, the second chart map and the third chart map by the dual-camera module to be corrected under different focal lengths. With the adoption of the method, the three chart maps at different distances and / or different deflection angles are sequentially shot by dual cameras under different local lengths, close shot, medium shot and long shot are achieved to acquire video data required for correction of the dual-camera module, the video data is applied into a dual-camera module correction system to achieve optical axis and optical distortion compensation, and the imaging quality of the dual-camera module is further 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 relates to a scanning close-range photogrammetry method, which is used for carrying out scanography by arranging an ordinary non-measurement digital camera on a scanography tripod head. The scene of a photographed target is divided into different blocks according to the distance of the photographed target and the focal length of the objective lens of the camera, corresponding base stations are arranged, and the number of the base stations is equal to the sum of the number of the divided blocks of the target and one; in order to reduce the difficulty in automated image matching arising from the deformation of the image of the photographed target, additional stations are additionally arranged among the base stations; and the scanography is carried out on a targeted object block through horizontally and vertically rotating the camera at each photographing station. According to the scanning close-range photogrammetry method, the photographing visual field angles of the photographing stations are increased, the acquired image data simultaneously meets the requirements on measurement accuracy and matching automation, the overall processing of all image data in a photographed area can be realized by using the classic aerial triangulation theory, and the high-accuracy measurement results can be obtained at a photographing distance from tens of meters to more than one thousand meters, so that the requirements on the measurement of large-scale scene targets can be met.

It is an object of the invention to realize an image processor that allows the user to designate the degree of depth feeling with his single operation. An image processor includes an image data input unit, a depth data input unit, a depth degree input unit, a depth feeling correction unit, and an image data output unit. The image processor controls, in accordance with the depth data and depth degree, the gain of the depth feeling correction, so that the user can freely adjust the depth feeling degree. The process of the depth feeling degree archives both of the near view process and the distant view process, and the adjustment is carried out with the one-dimensional parameter.

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.

Disclosed are a bifocal lens having two focal distances to enable near image capturing and far image capturing and capable of being manufactured to have a thin profile, and an imaging device including same. A bifocal lens according to disclosed embodiments may include: a refractive optical system having at least one refractive lens element and having a first focal distance; and a reflective optical system having multiple reflective surfaces and having a second focal distance that is different from the first focal distance. Because the refractive optical system and the reflective optical system have mutually different focal distances, the bifocal lens according to an embodiment may be capable of both near image capturing and far image capturing.

The present invention is a near-sighted lens of a wide-vision diving mirror, wherein contracted latching pieces at the upper, lower, and inner sides of a front lens of a wide-vision diving mirror are latched into the latching slots of lens frames of a mask; two assembling sections are formed by cutting the other side of the front lens, and one side of the side lens, respectively. As there is no frame edge interfering with the vision in combing the front and side lens into a mirror via their assembling sections, a wide-vision and replaceable near-sighted diving mirror can be formed.

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 provides a scratch detection method suitable for a vehicle distant view image. The scratch detection method comprises the following steps: segmenting a region of interest where scratchesmay occur by using a deep learning algorithm; obtaining a candidate scratch region in the region of interest by using scratch detection fusing color and spatial information and an MSER method; and screening the candidate scratch areas by comprehensively utilizing Hough line detection and an SVM method, and marking the scratch areas. According to the method, multiple image processing methods are comprehensively used for detecting the scratch area in the interested area, and the problems that features are not obvious and scratches and interference areas are difficult to distinguish due to the fact that the area of the scratch area in the vehicle distant view image is too small are solved. Meanwhile, close-range images do not need to be shot manually, and manual operation is liberated from complex scratch detection tasks.

The invention discloses a pair of combined myopia preventing and treating glasses, which comprises a pair of primary glasses and three groups of independent secondary glasses. The pair of primary glasses is a pair of shortsighted glasses and comprises a spectacle frame (1) and a pair of primary shortsighted eyeglasses (2). The first group of secondary glasses can be attached below the front faces or back faces of the main shortsighted eyeglasses (2) through connecting clamps (3); secondary eyeglasses thereof are formed by compounding 2 to 3.5 D convex spheres and 4 to 7 triangular prisms of which the base is inwards; and the first group of secondary glasses are especially suitable to be used by a student in class, wherein the student uses the upper half to look at a blackboard, and the lower half changes a near sight into a far sight when the student reads or writes so as to prevent the development of myopia. The second group of secondary glasses can be attached above the front faces or back faces of the main shortsighted eyeglasses (2); and secondary eyeglasses thereof are 3 to 5 D convex spheres and treat myopia in a far fogging mode. The third group of secondary glasses can be attached above the front faces or back faces of the main shortsighted eyeglasses (2); secondary eyeglasses thereof are formed by compounding 1 to 2 D convex spheres and 2 to 4 delta triangular prisms of which the base is inwards; and the third group of secondary glasses is especially suitable to be used by the user for watching a computer, and can eliminate eye fatigue, prevent and treat myopia.

The invention provides a near-far scene distributed parallel rendering method and system of an aviation simulator. The method comprises the following steps: dividing a whole rendering picture into a near-scene picture layer and a far-scene picture layer; independently rendering the distant view layer on a distant view GPU; dividing the distant view layer into odd frames and even frames, and rendering the odd frames and the even frames on different close-range GPUs; and performing frame-by-frame synthesis, segmentation and correction on the rendered long-range image and close-range image on a single image processing GPU, and restoring the corrected image into an image on a spherical surface according to a fixed frame frequency. A multi-channel hardware frame synchronization technology is abandoned, so that the hardware cost of the system is reduced, and a new thought is provided for research, development and innovation of an imaging system of the aviation simulator.

The invention relates to a near sight prevention system, comprising an image pick-up unit, a face identification unit, a driving unit, a conversion unit and a comparison unit, wherein the driving unit is used for the focus adjustment of a face driving image pick-up unit of the face identification unit; when the focus adjustment of a face is carried out by the driving unit, the conversion unit can record the walking steps of the driving unit, and converts the walking steps into actual distances between the face and the image pick-up unit; a standard distance range is prearranged in the comparison unit, and the actual distances are compared with the prearranged standard distance range by the comparison unit; and in the premise that at least one actual distance of the converted distances does not included in the standard distance range, the comparison unit sends out a trigging signal to an alarm unit so as to result in the alarm unit to alarm. The near sight prevention system of the invention can give an alarm to prompt a user when the viewing distance thereof is excessively short.

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.

A lens meter for measuring the optical characteristics of a lens to be measured comprises a measuring optical system having a light source projecting a measuring luminous flux to the lens and a light receiving sensor receiving the measuring luminous flux having passed through the lens, an operation part providing optical characteristic distribution in a prescribed measurement region of the lens on the basis of the results of the light-reception by the light receiving sensor, a near-sight part determining whether or not there is any near-sight part of the lens in the measurement region on the basis of the optical characteristic distribution in the measurement region, and a detecting means for detecting presence of a non-optical region in addition to the optical region of the lens in the measurement region on the basis of the results of the light-reception by the light receiving sensor.; The operation part provides the addition power of the lens from the optical characteristic distribution of the optical region in the measurement region when the presence of the near-sight part in the measurement region is not determined by the near-sight part determining means, and the presence of the non-optical region in the measurement region is detected by the detecting means.

A simple self-contained, hand-held instrument for reading an azimuth or bearing in relation to the earth's magnetic field either out in the field or on the water with substantial accuracy. Means are provided that places the far object into the same focal plane (or focal point) as the close up bearings on the compass disc face, thus allowing the eye to instantly see both images without adjustment between near-sight and far-sight. Means are also provided for the adjustment of the instrument for the local variation or declination of the earth's magnetic field versus that of true north.

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 defogging method and equipment for a foggy day traffic scene image, and the method comprises the steps: A, respectively calculating the atmospheric light values of corresponding regions in the foggy day traffic scene image according to different fog concentrations of a distant view region, a close view region and a transition region; then calculating a traffic scene imagesubjected to preliminary defogging according to an atmospheric scattering model by utilizing the transmission graph and the atmospheric light value of each channel in an HSI color space; B, on the basis of a preset I channel threshold value, performing global brightness improvement on the traffic scene image after preliminary defogging; wherein the preset I channel threshold value is obtained bysetting I channel pixels of a sky area in the traffic scene image subjected to preliminary defogging; wherein the sky area is obtained by segmenting the foggy day traffic scene image based on the darkchannel characteristics and the relative energy characteristics; and C, performing contrast-limited adaptive histogram equalization and guided filtering processing on the image obtained in the step Bto obtain a finally defogged traffic scene image. The method can be used for quickly and effectively defogging the traffic scene image.

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.