45results about How to "Guaranteed imaging clarity" patented technology

This invention discloses a kind of extra-thin reflection type projected display imaging method based on free curved surface and object lens. It has concave catopter, convex catopter, convex catopter, object plane and image surface in proper order. The merit of the invention are: 1) adopting free curved surface imaging method , three part reflection type Zernike polynomial free curved surface forms short focal distance bigger, relative apertures bigger fields of view angle imaging , rectifying optical aberration much better and its structure is simple; 2) adopting the reflection structure without optical lens, has removed the effect of various chromatic aberration , guarantee the imaging articulation; 3) adopt the design of short focal distance big fields of view angle, focal distance 8 - 15 mm, field of view angles 100 -135 degree, having 120 times multiplications under 250 mm imaging distance, having ultra-thin characteristic property; 4) adopting big relative apertures design ,the relative aperture is 2.0-2.4, having improved the illuminance of flat surface; 5) adopting image space telecentric imaging method , ensures that the image surface irradiance is homogeneous.

Optical fingerprint collector is composed of light source, prism, lens, image sensor and case. The collector also includes reflector of light source and reflector of image. Angle between normal direction of reflector of image and direction of emergent light is within 150 degree to 165 degree. Under precondition of ensuring imaging sharpness, the invention reduces size of optical fingerprint collector so as to suit situation such as fingerprint lock needed of small size and sharpness.

The invention discloses a dual-CCD (Charge Coupled Device) scanning imaging detection method for continuous casting slab surface defects. The dual-CCD scanning imaging detection method comprises the following steps: (1) mounting a linear array CCD camera, an area array CCD camera and a linear laser transmitter on a continuous casting slab; (2) scanning by the linear array CCD camera and the area array CCD camera according to a synchronous frame frequency and line frequency manner to obtain a two-dimensional image and a three-dimensional image of the surface of the continuous casting slab; (3) registering the acquired two-dimensional image and three-dimensional image; and (4) carrying out information fusion processing on the registered two-dimensional image and three-dimensional image in one area on the surface of the continuous casting slab, analyzing area-of-interest features of the two images, and extracting a final area-of-interest to be identified on the surface of the continuous casting slab by combining the feature fusion processing result of the two images, thus reserving reliable defect information of the surface of the casting slab and detecting the surface defects of the continuous casting slab. According to the dual-CCD scanning imaging detection method provided by the invention, the structure is simple and convenient; the method is high in detection precision, great in real-time property and capable of automatically eliminating interference information.

The invention relates to the technical field of image processing, and provides a ConvNets-based dark-light image processing method and terminal equipment. The method includes: preprocessing the original image data; inputting the preprocessed original data into a convolutional neural network model for feature enhancement; performing channel rearrangement processing on the output data of the convolutional network model to generate the The image corresponding to the above raw data. The invention can reduce the amount of data processed by the convolutional neural network model, reduce power consumption and increase the imaging speed under the premise of ensuring the imaging definition.

The invention discloses an EPID control device for a medical electron linear accelerator. The EPID control device comprises a carrying mechanism for mounting an EPID on the medical electron linear accelerator, a central position detecting unit, and a control unit connected with a host computer. The carrying mechanism is provided with an adjusting mechanism for mounting the EPID and driving the EPID to move horizontally or vertically. The adjusting mechanism is provided with a driving component equipped with a position feedback unit. The central position detecting unit is disposed at a centralposition corresponding to the EPID and below the EPID, is configured to detect whether the EPID moves to a central position. The driving component and the position feedback unit of the adjusting mechanism and the central position detection unit are all connected to the control unit. The EPID control device can automatically correct the central position of the EPID, and can fine adjust the centralposition of the EPID to ensure the accuracy of the central position and accurately position the EPID.

The invention discloses a site safety monitoring device, which mainly includes a middle plate, a perspective cover, an imaging module, a brush holder and an assembly shell, a bottom frame is fixedly installed on the outer wall at the bottom edge of the middle plate, and the bottom frame is screwed and installed There is a see-through cover, the middle part of the middle plate is fixedly installed with an assembly shell, the middle part inside the assembly shell is fixedly installed with a middle pipe seat, the inside of the middle pipe seat is screwed and installed with an imaging module, and the inside left part of the assembly shell is fixedly installed with a second The motor, the motor shaft of the second motor is fixedly installed with a driving wheel, and the driving wheel is meshed with the imaging module. The present invention has a reasonable design in structure, and the device has strong assembly flexibility, and can be well assembled corresponding to walls or brackets with different inclination angles; and the front-end equipment has a good degree of freedom and a large monitoring range; and the front-end equipment has a light supplement equipment The arrangement is reasonable, and it moves with the camera to ensure the clarity of the image captured by the camera, and has a good cooling effect to ensure the service life of the heating components.

The invention discloses a low-energy sparse CT (computed tomography) detector, a CT detection system and a detection method, belongs to the technical field of CT detection, and solves the problems that a CT detection device in the prior art is high in cost, not beneficial to popularization and application of equipment, low in cost, incapable of ensuring imaging precision and the like. The CT detector comprises high-energy detectors and low-energy detectors, the high-energy detectors and the low-energy detectors are arranged in a back-to-back mode, and one high-energy detector is arranged beloweach low-energy detector; the number of rows of the high-energy detectors is larger than the number of rows of the low-energy detectors, and at least part of the low-energy detectors are distributedin a centralized mode. Part of low-energy detectors of the CT detector are arranged in a centralized mode, the cost is reduced, and meanwhile the imaging precision is high.

The invention provides a pixel structure, a display panel and a display device, and belongs to the technical field of display. The pixel structure is applied to a display device included in an optical imaging system. The optical imaging system further includes an optical system. An image displayed on the display device is amplified by the optical system and then projected to the pupils of a viewer. The pixel structure comprises multiple pixel units. The position of each pixel unit on a display panel forms a first preset relation with the offset center of the pixel unit, the offset of the pixel unit and the pixel coordinate of the pixel unit, wherein the offset center corresponds to the distortion center of the optical system, and the offset corresponds to the distortion ratio of the optical system. When a display device with the pixel structure provided by the invention and a corresponding optical system form an optical imaging system, the display device can effectively compensate the distortion of the optical system and guarantee the imaging resolution of the optical imaging system.

The invention discloses a compensation method for inconsistency of focal length after day and night switching cameras, the day and night switching camera includes a lens and an optical filter switching mechanism, and the optical filter switching mechanism is provided with a visible light filter and an infrared optical filter. The compensation method is to make the thickness of the visible light filter greater than the thickness of the infrared filter, and the distance that the visible light filter shifts the back focus of visible light is greater than the distance that the infrared filter shifts the back focus of infrared light. The back focus distance difference caused by the film compensates the back focus difference caused by the lens, so that the back focus distance of visible light and infrared light are consistent. The invention skillfully utilizes the difference in thickness between the visible light filter and the infrared filter, and uses the back focus deviation caused by the filter to compensate the back focus deviation caused by the lens, so that the back focus of the visible light and the infrared light are consistent. In this way, without the need for focusing, the imaging clarity of the day and night switching camera can also be guaranteed.

The present invention proposes a method for denoising and enhancing laser underwater imaging images for marine detection, which belongs to the field of image processing and pattern recognition. Noise processing is performed on the image; secondly, in view of the problem that some noise still exists in the image after SVD processing, wavelet decomposition and reconstruction are performed on the image in the wavelet domain to achieve the purpose of wavelet denoising and enhancement; finally, FFT is performed on the image in the frequency domain Enhance, improve image contrast and effectively maintain image clarity. Experiments show that the method of the invention can effectively overcome the block effect caused by local histogram equalization, realize image enhancement, effectively suppress image noise and maintain image clarity.