17 results about "Reduced contrast volume" patented technology

The present invention provides a configuration for anti-counterfeiting printed material in which a first two-dimensional code, which is easily readable under visible light illumination and difficult to read under near-infrared light illumination, and a second two-dimensional code, which is difficult to read under visible light illumination and easily readable under near-infrared light illumination, are formed to overlap, thereby enabling easier reading of the two-dimensional codes than in conventional configurations. [Solution] A filter layer 9 that attenuates visible light and / or near-infrared light is formed in the overlapping area of ​​the first two-dimensional code 3 and the second two-dimensional code 4. With this configuration, when reading one of the two-dimensional codes 3 and 4, the contrast of the other two-dimensional code 3 and 4 that appears in the captured image is reduced, making it easier to read the two-dimensional codes 3 and 4 compared to the conventional configuration.

The application discloses a tunnel crack detection method based on image recognition and relates to the technical field of civil engineering structure health monitoring and operation and maintenance detection. The direction self-adaptive deblurring processing can significantly improve the integrity of the crack edge under the motion blur state, the slender crack still maintains clear morphological characteristics under the dynamic acquisition condition, and the crack breaking or missing detection problem caused by the blur is avoided; the illumination invariance feature enhancement mechanism is introduced to effectively overcome the interference of uneven illumination in the tunnel, the crack details in the shadow area and the overexposure area are fully reserved through dynamic balance of the brightness difference at the feature level, the contrast of the crack and the background is enhanced, and the false detection rate under the complex illumination condition is reduced; the collaborative design is adopted to guarantee the practicability and robustness of the system, the quality gate mechanism automatically filters the low-quality input, and invalid processing is avoided.

A contact lens (101) for preventing or slowing the progression or worsening of myopia, and methods of making and using the lens (101). The optical zone (102) of the lens includes a central region (105) having a base power. The optical zone (102) includes an annular region (103) circumferentially surrounding the central region (105). The annular region (103) includes a treatment zone (107) having a property that reduces the contrast of an image of an object formed by light passing through the central region (105) and the treatment zone as compared to an image of the object formed by light passing through only the central region (105). The property causing the reduction in contrast varies with meridians around the annular region (103). A peripheral zone (104) surrounding the annular region (103) has a constant thickness profile or a thickness variation configured to promote rotation of the lens (101) in each meridian.

The application discloses a manufacturing method of an LED chip and a mask set used for the LED chip, and reserves a measurement pattern area on an LED chip wafer; measurement patterns to be measured are transferred to the measurement pattern area to obtain an LED chip wafer finished product; the mask set used for the pattern transfer comprises a plurality of mask bodies; each mask body is provided with the same measurement pattern area; the measurement pattern area is provided with a measurement pattern; when the measurement pattern areas on the plurality of mask bodies are overlapped, the measurement patterns on each mask body are not overlapped with each other, different measurement patterns have a certain spacing, other lines are prevented from interfering, and based on the measurement pattern area, some film layers which are irrelevant to line width measurement and can cause contrast reduction can be selectively not plated through photolithography, so that the line width measurement value error caused by pattern stacking or film layer multiple contrast difference or no data is avoided, and subsequent AOI machine is facilitated to accurately measure the line width of the LED chip.

The application is an underwater image super-resolution reconstruction method based on dynamic window and state space cooperation. The method comprises a shallow feature extraction module, a deep feature extraction module and an image reconstruction module, through the construction of a double-path feature interaction mechanism, the alternative learning of a dynamic window attention module and a visual state space module is adopted, the cooperative optimization of local detail enhancement and global context modeling is realized. A dynamic channel gate feedforward network is innovatively designed, through a channel weight dynamic adjustment mechanism guided by a global average pooling, adaptive fusion of multi-scale features is realized. The method effectively solves the problems of blur and contrast reduction of underwater images caused by scattering effect, the PSNR is 28.21dB in the x3 task of the USR-248 dataset, which is 0.35dB higher than that of SRFormer, the experimental results show that the model has excellent performance in objective evaluation index and subjective evaluation, and remarkable effect is achieved in detail recovery, which has significant technical effect and industrial application value.

The invention relates to a method for reducing external stray light incident on an optical system (1), comprising the following steps: providing an optical system (1) in which imaging of a light source is ensured; positioning a transparent, plate-shaped light guide (3) in the optical system (1), wherein the light guide (3) has structural elements (6) on at least one of its large surfaces (3a, 3b) and / or within its volume, and each structural element (6) has at least one functional surface for the defined deflection of light, at which stray light is coupled into the light guide (3) and / or deflected from the optical axis, whereby stray light coupled into the light guide (3), if present, is coupled out again and / or absorbed at one or more surfaces of the light guide (3).such that at least 10% of the interfering light incident on the optical system (1) is coupled into the optical fiber (3) and thus removed from the optical path of the optical system (1), and such that the imaging of the light source is disturbed due to the limited scattering of the optical fiber (3) to such an extent that the Michelson contrast of the imaging of the optical system (1) is reduced by no more than a factor of 2. The invention further comprises an arrangement implementing the method and the use of the method or the arrangement in a head-up display.

To eliminate a phenomenon that the light of the high luminance part of a video interferes with another dark part and the whole contrast is lowered in a stereoscopic screen in a dome shape or the like.SOLUTION: In a case where an image in which a bright portion and a dark portion are present is projected on a curved surface of a dome-shaped screen seen in a planetarium, an exhibition image, or the like or a projection screen disposed to face and be close to each other, the projection screens interfere with each other and the contrast is extremely lowered, but the screen of the present application has a three dimensional shape composed of a large number of planes, and thus mutual interference cannot physically occur. Therefore, even in the case of an image having a large difference between light and dark, a decrease in contrast in which the luminance of a bright portion interferes with a dark portion does not occur as in the case of a normal flat screen. Further, since a space is provided between the large number of planes, an acoustic problem such as reverberation occurring in a conventional dome screen or the like hardly occurs, and air conditioning is easily performed. In addition, the stereoscreen of the present application connected by the deformable member is foldable.SELECTED DRAWING: Figure 8

The application discloses a low-light enhancement method and device based on a dynamic filter and a storage medium, and belongs to the technical field of image processing. The low-light enhancement method based on the dynamic filter first extracts different scale features of an input low-light image by using a residual down-sampling module and a pyramid convolution pooling module in an encoder to obtain multi-scale image feature information; then, the feature information of different scales is input into a filter generation network to obtain each local dynamic filter at a decoding end, and the image feature information obtained by the encoder is input into a decoder to perform decoding processing by using each local dynamic filter and a pixel recombination up-sampling module, so that low-light enhancement and blur removal are realized. The method has the characteristics of multi-scale feature extraction, feature enhancement, spatial change adaptability and structure reservation, and solves the problem that insufficient light greatly reduces the visual quality of an image, and further causes image detail blur, contrast reduction and noise.

The embodiment of the invention provides a display panel and a display device. The display panel comprises a display substrate, a polarization layer and a barrier layer. The display substrate comprises at least one inorganic material layer. The polarization layer is located on one side of the display substrate and comprises a polarization function layer. The barrier layer is at least arranged between the inorganic material layer and the polarization function layer, and the barrier layer is configured to prevent the acid-base gas from diffusing to the polarization function layer. Acid-base gas generated by the inorganic material layer is prevented from permeating into the polarization function layer, so that the possibility of polarization function failure of the polarization function layer caused by contact between the polarization function layer and the acid-base gas can be reduced, the contrast ratio of the display panel is improved, the possibility of picture distortion of the display panel is reduced, and the display quality is improved. And the user experience is improved.

The invention discloses a tunnel crack detection method based on image recognition, relates to the technical field of civil engineering structure health monitoring and operation and maintenance detection, and can remarkably improve the integrity of crack edges in a motion fuzzy state through direction self-adaptive deblurring processing. Clear morphological characteristics of the slender crack are still kept under the dynamic acquisition condition, and the problem of crack fracture or leak detection caused by fuzziness is avoided. An illumination invariance feature enhancement mechanism is introduced to effectively overcome the interference of uneven illumination in the tunnel, and the brightness difference is dynamically balanced on the feature level, so that crack details of a shadow area and an overexposure area are fully reserved, the contrast ratio of cracks and the background is enhanced, and the false detection rate under the complex illumination condition is reduced; collaborative design is adopted, the practicability and robustness of the system are guaranteed, a quality gating mechanism automatically filters low-quality input, and invalid processing is avoided.

The invention discloses an aero-engine part DR image enhancement method and device and a storage medium. According to the DR image enhancement method, firstly, a DR image to be enhanced is obtained, then, the ray scattering intensity of the DR image to be enhanced is calculated, then, the transmissivity of the DR image to be enhanced is calculated, a transmissivity algorithm is divided into a rough calculation part and a fine calculation part, and the fine calculation transmissivity can be obtained through guided filtering and regularization iterative calculation after rough calculation. After ray scattering intensity and fine calculation transmissivity are obtained, a picture with scattering noise removed can be obtained through calculation, finally gamma correction is conducted on the picture with scattering noise removed, and a final enhanced DR image is obtained. According to the method, the contrast ratio of the DR image is improved, the noise of the DR image is reduced, and the situation of missing detection of defects is avoided.

This invention discloses an anti-glare floating object detection method based on deep learning and image enhancement. To address the issues of strong reflections and local overexposure caused by direct sunlight in water surface monitoring scenarios such as rivers and reservoirs, leading to reduced contrast and missed detections of floating objects, as well as the problems of numerous false targets and unstable detection results caused by dynamic backgrounds such as water ripples, waves, and currents, this invention decomposes water surface image sequences into specular and diffuse reflection components to generate glare and overexposure masks. A diffusion repair network is used to repair and reconstruct overexposed areas of the diffuse reflection component. During instance segmentation, multi-scale features are weighted and suppressed based on the glare mask to reduce glare interference. Furthermore, a temporal mask propagation network is employed for cross-frame propagation and consistency correction, outputting the floating object instance outline and confidence level. This achieves improved detection accuracy, reduced false detections, and continuous and stable results for floating objects under strong glare and dynamic backgrounds.

The application provides a kind of microscopic imaging method and probe device based on laser illumination, belong to microscopic imaging technical field, the present application is generated laser by semiconductor laser and is conducted to lens system by optical fiber and forms transmission type illumination, utilizes rotation diffusion sheet and carries out speckle time domain average processing to reduce speckle contrast to threshold value below, adopts pulsed laser stroboscopic illumination mode to eliminate motion blur, by telecentric lens and industrial camera collection through the groove in the particle image, with high density particle adhesion segmentation processing based on graph cut accurately separates adhesion particle from high solid content image and extracts particle shape parameter and particle size distribution data, finally by laser power self-adaptive regulation and control artificial intelligence model, according to image quality evaluation function, realize illumination power closed loop control, solve the technical problem that particle adhesion segmentation precision is seriously reduced under high solid content scene caused by laser speckle noise.

The utility model provides an indoor construction environment acquisition panoramic scanning device which comprises a suspension arm, a transmission assembly is arranged at the bottom of the suspension arm, a driven assembly is arranged on one side of the transmission assembly at the bottom of the suspension arm, an installation column is fixedly installed and connected to the bottom of the driven assembly, a transmission module is arranged in the installation column, and the transmission module is connected with the transmission assembly. According to the utility model, when the dome camera is strongly irradiated by sunlight in the shooting process, the device can drive the driving gear and the transmission gear to rotate through the motor so as to drive the shading plate to rotate, so that the direct irradiation of the sunlight is blocked; the problems of image overexposure, glare or contrast reduction and the like caused by strong light are effectively avoided, and the definition and the consistency of shot images are ensured.

The application provides a shielding film defect detection method and system, the method comprising: acquiring a transmission image, a red light reflection image and a near-infrared reflection image corresponding to the shielding film, and then acquiring a defect feature image; filtering out frequency domain components corresponding to inherent periodic textures of the shielding film in the defect feature image to obtain an enhanced image; inputting the enhanced image into a feature extraction network to obtain a defect feature map; obtaining a defect feature vector based on the defect feature map, comparing the defect feature vector with a plurality of defect feature templates, and obtaining a detection defect category. By acquiring images of three different physical imaging modalities of transmission, red light reflection and near-infrared reflection, the information limitation of single waveband imaging is broken, the signal-to-noise ratio and detectability of the defect signal are improved from the source, the contrast is improved, and the missed detection rate is reduced. By filtering out the inherent periodic textures of the shielding film, the background texture interference is targeted and actively suppressed, and the probability of misjudging the texture as a defect is reduced.

This invention claims protection for a microwave thermoacoustic imaging method based on optimized electric field distribution using a reflective surface, belonging to the field of microwave thermoacoustic imaging technology. In traditional microwave thermoacoustic imaging technology, the microwave thermoacoustic image reconstructed from sound pressure reflects the combined information of the dielectric properties of the imaged object and the excitation electric field in the surrounding area. To obtain accurate conductivity information of the imaged object, the excitation electric field during the microwave thermoacoustic imaging process needs to be sufficiently strong and as uniformly distributed as possible. Currently, thermoacoustic microscopy (TAM) systems face the limitation of low signal-to-noise ratio due to insufficient excitation electric field strength. The point-focusing metal reflective surface constructed according to this invention can increase the excitation electric field strength of the TAM system while improving its uniformity through reflection and focusing at a lower cost, thereby improving image quality. The optimization method of this invention is also applicable to improving the problem of reduced image contrast caused by uneven excitation electric field distribution in thermoacoustic tomography (TAT) systems.

Smaller halftone tiles are implemented on a first modulator of a dual modulation projection system. This techniques uses multiple halftones per frame in the pre-modulator synchronized with a modified bit sequence in the primary modulator to effectively increase the number of levels provided by a given tile size in the halftone modulator. It addresses the issue of reduced contrast ratio at low light levels for small tile sizes and allows the use of smaller PSFs which reduce halo artifacts in the projected image and may be utilized in 3D projecting and viewing.