37results about How to "Improve imaging frame rate" patented technology

The invention provides an active and passive ultrasonic composite imaging method and system for focused ultrasonic irradiation on phase change nanometer liquid drops. After passive ultrasonic originalradio frequency signals are subjected to time delay compensation processing, a cross-correlation coefficient matrix and a passive amplitude coherent wave beam forming energy matrix are obtained respectively through two complementary square wave apodizing functions and an amplitude coherent coefficient; after the two matrixes are subjected to point multiplication, a high-resolution passive ultrasonic imaging result is obtained; phase change microbubble group mother wavelets are constructed through a phase change microbubble group vibration model; active wave beam forming radio frequency signals obtained after the mother wavelets are used for performing time delay superposition on the active ultrasonic original radio signals are subjected to continuous wavelet transformation to obtain a high-contrast active ultrasonic imaging result; and a composite image is obtained after the high-resolution passive and high-contrast active ultrasonic imaging results are compounded. The method and thesystem can be used for performing whole-process monitoring on cavitation activities in the focused ultrasonic irradiation process of the phase change nanometer liquid drops and the residue phase change microbubbles when the irradiation is stopped.

The invention relates to a high-speed imaging system and method for spatial spectrum filtering frequency domain reconstruction, which solves the technical problems of the FRAME method that the crosstalk of image frequency domain information at each moment affects the spatial resolution of frequency domain reconstruction dynamic scenes and the number of frames is small. In the system, the pulsed light source is used to emit n optical pulses with different wavelengths, n≥2 and n is an integer; a structured light sequence generation unit, a high-speed scene generation unit, and a 4f spatial spectrum filter unit are arranged in sequence along the transmission direction of the optical pulses; image The acquisition unit receives the output signal of the 4f spatial spectrum filtering unit, and the image acquisition unit is connected with the data processing unit. The method includes: a pulsed light source emits n light pulses with different wavelengths; generating a structured light pulse sequence; forming a structured signal light pulse sequence; Spatial domain image and exposure; image sequence reconstructed using frequency domain reconstruction algorithm and displayed.

An FPGA-based space compound imaging method and device. The method comprises: acquiring ultrasonic non-space compound image data at different deflection angles (S101); carrying out interleaving processing on the ultrasonic non-space compound image data (S102); correcting the coordinates of the ultrasonic non-space compound image data, which has undergone interleaving processing, so as to recover image data subjected to angle deflection to image data with zero angle deflection (S103); carrying out de-interleaving processing on the image data, the coordinates thereof having been corrected (S104); and superposing pixel points corresponding to the de-interleaved ultrasonic non-space compound image data with different deflection angles, and generating a space compound image (S105). The present invention reduces the complexity of implementing a space compound algorithm, can effectively improve a space compound calculation speed, reduces the processing time for an image, and improves an imaging frame rate.

The invention relates to a line-scanning confocal ophthalmoscope system based on laser diffraction and a method. The system comprises a linear beam generation module, a beam-splitting module, a scanning module, an imaging module and an output module. The invention is characterized in that: the intensity of the linear beam generated by the line-scanning confocal ophthalmoscope system is uniformly distributed in a non-Gaussian form, a scanning galvanometer is adopted to scan the linear beam in a one-dimensional space to illuminate an ocular fundus retina, meanwhile, a linear detector is used for imaging the non-scanning linear beam reflected by the ocular fundus retina, and since the system only uses one scanning galvanometer and one linear detector, the number of the moving parts is less; meanwhile, a confocal slit is conjugated with the ocular fundus retina plane, consequently, the affection of the stay light of the non-retina plane on the imaging quality is eliminated, and thereby the high resolution of the confocal imaging principle. The system has the advantages of good linear beam quality, simple system structure, easy manufacturing, short light path, easy adjustment, small size, applicability, high stability and high imaging frame frequency.