10 results about "Multiple frame" patented technology

The invention discloses a face feature point rapid alignment method based on an AAM, and belongs to the technical field of mode identification. The face feature point rapid alignment method of the invention comprises the steps of performing face feature point calibrating on an input face image so as to use the input face image as a training sample of a contour model; performing contour model training on the training sample by using an AAM active contour model method to obtain the contour model; inputting a continuous multi-frame video image to be processed; if the current frame is a starting frame, performing AAM search matching on the whole image to obtain a face feature point alignment result of the current frame and contour model; and if the current frame is not the starting frame, the face feature point alignment result of the previous frame is regarded as the starting position, and AMM searching and matching is carried out on the current frame to obtain the face feature point alignment result of the current frame and the contour model. The face feature point rapid alignment method of the present invention is applied to face recognition processing, the iteration initial position of the current frame is determined by the alignment structure of the previous frame, so that the search range and the number of iterations are reduced and the time consumption in the face feature point alignment is greatly reduced.

The invention discloses a method and apparatus for acquiring multi-frame wide dynamic images. The scheme of the present application, the same image is processed, which can be extended to multiple images of different brightness, and then these images are fused, Therefore, there is no common problem that the dynamic object affects the image in the multi-frame-width dynamic image, only the brightnesslayer needs to be controlled to obtain the image similar to the multi-exposure effect, which reduces the complexity and debugging difficulty of the multi-frame-width dynamic algorithm, and can keep the color of the image unbiased by the color ratio, so as to provide the guarantee for the color of the image fusion. In addition, the technical proposal of the application also reduces the hardware requirements of the multi-frame width dynamic algorithm.

The invention discloses an intelligent generation method of range gate pull-off interference, belongs to the technical field of electronic countermeasures and aims to solve the problem that a traditional range gate pull-off interference method ignores information interconnection among multiple frames and is not flexible. The method comprises the following steps of: analyzing a range gate pull-off interference process and establishing a range gate pull-off interference multi-frame optimization model; in order to measure the effect of range gate pull-off interference, selecting an average gate offset distance as a target function; aiming at the challenges that the intermediate state of the target function is unknown and noise is involved, fitting the target function by utilizing a Monte Carlo method; and finally, providing a range gate pull-off interference optimization method based on an improved particle swarm algorithm. The algorithm provided by the invention can dynamically adjust the pull-off distance of different frames, maximizes the range gate pull-off interference effect, and is superior to a traditional method in the aspects of pull-off success rate and pull-off distance.

The invention discloses a large-gradient free hook face measurement method. The method comprises the following steps that: applying a certain angle to a free hook face to be measured to finish the spatial frequency modulation of a free curve diffraction object light wave, and collecting by an image sensor; regulating a plurality of angles, recording multiple frames of holograms of which the free hook faces have different angles, then, through an image processing algorithm, finishing selecting the stripe sparse subarea of each frame of hologram, and recovering the subarea three-dimensional structure of the modulated free hook face to be measured through a digital reconstruction algorithm; and finally, according to a demodulation algorithm, recovering the subarea three-dimensional structureof the original free hook face to be measured, utilizing a proper stitching algorithm to realize the wavefront data fitting of multiple frames of subareas, and therefore, recovering the three-dimensional surface shape information of the free hook face. Through the introduction of an inclination angle, the collection process of free hook face high-frequency information is realized, and a new solution is provided for free hook face measurement.

The invention provides a three-dimensional reconstruction and visualization method and device for a three-dimensional image. The method comprises the following steps: carrying out single-frame denoising on a spatial domain and a pixel range domain of a three-dimensional image, and carrying out clustering segmentation on the denoised image to obtain a classified image; performing interpolation fitting on the classified images to obtain target object smooth images, and obtaining absolute coordinates and point intensity information of each frame of target object smooth image; and performing registration splicing on the multiple frames of target object smooth images according to the absolute coordinates to obtain a first image, and performing three-dimensional visual color rendering on the first image according to the intensity information of the points to complete three-dimensional reconstruction and visualization of the three-dimensional image. According to the method and device, noise points and clutters can be removed, accurate registration splicing of multi-frame data is realized, and the visualization level and real-time rendering efficiency of sonar images are improved.

The invention discloses a semi-detached multi-frame graphite boat. The semi-detached multi-frame graphite boat comprises two multi-frame graphite boats, wherein the tail ends of adjacent two graphiteboat pieces of each multi-frame graphite boat are connected through a graphite partition block and a bolt rod. The semi-detached multi-frame graphite boat is characterized in that each graphite partition block is provided with at least one gas flow through hole, which communicates with a gas flow channel between adjacent two graphite boat chips of the multi-frame graphite boat, and a conductive insertion rod hole; adjacent two graphite partition blocks in the two multi-frame graphite boats are electrically connected through a conductive insertion rod, and the conductive insertion rod is inserted into a conductive rod insertion rod hole of each graphite partition block; and the gas flow channels on the two adjacent graphite partition blocks on the two multi-frame graphite boats communicatewith each other. The two graphite boats are delicately matched for use in a furnace tube, so that the yield is increased, expansion is reduced to prolong accumulated errors, and the rate of defectiveproducts is reduced.