5 results about "Dark band" patented technology

The invention provides a cerebral trauma semi-dark band image segmentation method and device, equipment, a medium and a product, and the method comprises the steps: obtaining at least two modal magnetic resonance images, inputting the at least two modal magnetic resonance images into a trained feature fusion module for fusion, and obtaining a fusion image; and inputting the fused image into a trained segmentation module for image segmentation to obtain a cerebral trauma semi-dark band region. According to the invention, the automatic identification of the cerebral trauma penumbra region is realized, and the identification efficiency of the cerebral trauma penumbra region is improved.

The application provides a method for simulating dark area color strip noise by low-light enhancement training data, wherein the luminance range of a dark area is extracted on a dark image, and according to the range, noise is randomly generated by simulating the distribution of color strip noise of a real scene on the RGB three channels of the dark area of the dark image. The method solves the problem that the model training cannot adapt to the denoising requirement of a real dark-light scene, and reduces the cost of collecting real training data. The method comprises the following steps: S1, image pre-statistics; S2, image light and dark partition; S3, dark area luminance statistics; S4, noise image template generation; S5, noise generation; S6, image splicing, and noise synthesis is completed.

The present application discloses a kind of multilayer light diffusion plate and its preparation method.The multilayer light diffusion plate includes a main layer and a half-transmission half-reflection layer.The light exit surface of the multilayer light diffusion plate is the top surface of the main layer, and the light entrance surface is the bottom surface of the half-transmission half-reflection layer.The half-transmission half-reflection layer is located below the main layer and is composed of a plurality of first substrate layers and a plurality of second substrate layers stacked alternately.The materials of the first substrate layers and the second substrate layers have different refractive indices.The light entrance surface of the light diffusion plate is provided with a half-transmission half-reflection layer, which can partially transmit and partially reflect the linear light source intensity of the LED light source module below, thereby reducing the bright-dark band between LEDs and achieving the effect of uniform light.In addition, the half-transmission half-reflection layer composed of a plurality of first substrate layers and second substrate layers with different refractive indices stacked alternately is provided on the light entrance surface of the light diffusion plate by extrusion molding, which is relatively simple and low in cost.

An artificial intelligence (AI) device and methods for recognizing wind along a projectile trajectory path by recognizing winds effect on a string. The string is the teacher. Embodiments include a deep learning model implemented as convolutional neural networks to detect a string and identify wind direction and speed along at least a segment of the projectile trajectory path to a target. The AI is trained with images (photos and or video) and / or audio recordings of strings as well as wind direction and speed at number of points along the projectile trajectory path. One embodiment supports the string with a rod having a predetermined pattern of dark bands and light bands. The trained, portable AI device recognizes a string in real time. When optimum wind speed is sustained for brief time, a green light is illuminated. An aiming point is adjusted for range and crosswind.

An optical device for an augmented reality (AR) device is provided that mitigates dark band issues. The optical device includes a waveguide, a first in-coupling element to receive light and couple a first portion of the light into the waveguide and toward an expansion element. A second portion of the light is not coupled into the waveguide. The expansion element directs the first portion to an out-coupling element. Further, a re-coupling element receives a third portion of the light and directs the third portion of the light to a second in-coupling element, where the third portion includes some or all of the second portion. The second in-coupling element couples a fourth portion of the light into the waveguide and toward the out-coupling element, where the fourth portion includes some or all of the third portion. The out-coupling element receives the first portion and the fourth portion and couples the light out of the waveguide.