Automatic EMCCD gain adjusting method

The invention discloses an automatic EMCCD gain adjusting method. A camera working mode is set to be a continuous photographing mode, a brightness mean value of the current frame image is calculated and judged whether to be in the best brightness region, the illumination condition of the current frame image is judged and the exposure time of the EMCCD camera for photographing a next frame image is adjusted according to the judgment result if the brightness mean value of the current frame image is in the best brightness region, and if the brightness mean value of the current frame image is not in the best brightness region, the gain condition of the current frame image is judged according to the brightness mean value of the current frame image, and the exposure time of the EMCCD camera for photographing the next frame image is adjusted according to the judgment result; and the gain value for photographing the next frame image is calculated, and brightness of the next frame image is adjusted ...

FPGA-based infrared focal plane array blind pixel detection system and FPGA-based infrared focal plane array blind pixel detection method

The invention discloses an FPGA-based infrared focal plane array blind pixel detection system and an FPGA-based infrared focal plane array blind pixel detection method. The system comprises a two-point parameter calculation and storage module, a mask slide window blind pixel detection module based on a gain matrix K, a secondary 3Sigma blind pixel detection module based on a bias matrix B, a blind pixel set table storage and update module, and a blind pixel compensation module. The detection method comprises the following steps: performing two-point parameter calculation on an original digital image signal to obtain a two-point parameter matrix and storing the two-point parameter matrix in an internal RAM of an FPGA; carrying out mask slide window blind pixel detection based on the gain matrix K and secondary 3Sigma blind pixel detection based on the bias matrix B on the two-point parameter matrix and combining the results of two times of blind pixel detection to obtain a blind pixel set ...

Laser and infrared composite stealth resisting spectroscopic device

The invention discloses a laser and infrared composite stealth resisting spectroscopic device, which comprises a pulse generator, a narrowband scanning controller, a logic processing component, a spectrum narrowband scanning filter, a high-sensitivity mercury-cadmium-tellurium APD (Amplitude Probability Distribution) detector, a framing single-photon image receiver, a target extracting component,an image fusion component and a monitor, wherein the pulse generator is connected with a narrowband scanning stepped controller and the logic processing component respectively; the narrowband scanning controller is connected with the spectrum narrowband scanning filter and the high-sensitivity mercury-cadmium-tellurium APD detector respectively; the spectrum narrowband scanning filter is arrangedat the front end of the high-sensitivity mercury-cadmium-tellurium APD detector; the high-sensitivity mercury-cadmium-tellurium APD detector, the framing single-photon image receiver, the target extracting ...

Self-adapted digitalization method and its circuit for infrared plane array

Three-dimensional distance image time domain real-time denoising method based on photon counting

The invention discloses a three-dimensional distance image time domain real-time denoising method based on photon counting. The method comprises the steps of firstly improving a traditional imaging model based on a maximum likelihood estimation algorithm by using different characteristics of flight time of noise photons and signal photons; then using the prior knowledge to act as a discriminating standard for judging the signal photons and the noise photons, carrying out sequential detection on photons detected by a detector subsequently, and updating the standard in real time by using flight time of discriminated signal photons detected subsequently at the same time; and finally, using the detected signal photon number K to act as a sampling stopping threshold condition for each pixel point, deciding optimum distance information of each pixel point adaptively, and reconstructing a three-dimensional distance image with a target being clear. The method disclosed by the invention not only ...

Hyperspectral target detection method based on adversarial auto-encoder and attention mechanism

The invention discloses a hyperspectral target detection method based on an adversarial auto-encoder and an attention mechanism, and the method comprises the steps: carrying out the coarse detection of an input hyperspectral image, and obtaining a background sample which is as pure as possible as training data through adjusting a binarization threshold value of a coarse detection result image; training a model based on an adversarial auto-encoder and an attention mechanism by using the manufactured training data to obtain a model capable of accurately reconstructing a hyperspectral image background; inputting a test hyperspectral image into the network for reconstruction, and calculating a spectral distance from a reconstruction result to an original hyperspectral image pixel by pixel to obtain a distance map; and background suppression is applied to the distance map to obtain a final detection result map. According to the method, a spectral attention mechanism is introduced to distribute ...

LabVIEW-based calculation type ghost imaging driving method

The invention discloses a labview-based calculation type ghost imaging driving method. The method is characterized in that a mathscript module is used for generating a random matrix of which the size is the same as a pixel block, wherein the random matrix is converted into gray level images by a vision module and the gray level images are displayed on a full screen; a spatial light modulator is used for lighting object targets by using a light source containing reference light information to form an object-light information light source; a DAQ module is used for supplying high electric level for a camera to trigger the camera to photograph images containing object-light information; a saving module is used for saving reference light images. With combination of characteristics of an SLM device, pixel blocks are combined; the accuracy and consistency of experiment data of the reference light images and the object-light image can be ensured; the method is relatively suitable for research of ...

Method for estimating number of optimal orders

The invention discloses a method for estimating the number of optimal orders. The method is suitable for estimating the number of corresponding orders when the quality of a high-order ghost imaging image is the best, and the number of the orders at the moment is the number of the optimal orders; the number of pixel blocks corresponding to the number of pixels in an image information area is called as the number of effective pixels; high-level processing is performed on a reference image and an object image through stimulating a ghost imaging experiment, a reconstructed image is stimulated, and the contrast ratio and the carrier-to-noise ratio of the reconstructed image are calculated; in combination with a high-order ghost imaging image quality assessment method, the number of the optimal orders corresponding to high-order ghost imaging under the condition of the number of the different effective pixels is estimated, and a relation between the number of the optimal orders and the number ...

Dynamic range test method for large dynamic blackbody radiation source array

The invention discloses a method for testing the dynamic range of a large dynamic blackbody radiation source array, and the method comprises the steps: building a testing system, controlling the temperature rise of a blackbody radiation source array in the system, and obtaining a blackbody temperature corresponding to the overflow of an infrared camera, and a camera output voltage signal corresponding to the blackbody temperature. And controlling the blackbody radiation source array from cooling to sampling calculation to obtain a system noise root-mean-square voltage signal. A reflection type attenuation piece assembly is additionally arranged, and a camera output voltage signal and an attenuation coefficient of the attenuation piece assembly are determined; and finally determining the dynamic range of the blackbody radiation source array according to the formula.

Infrared focal plane array image-forming demonstration system

The invention discloses an infrared focal plane array imaging demonstrating system. Said system comprises an infrared radiating resource, infrared optical lens, an infrared focal plane detector, a programmable infrared detector driver, a high-speed interface, a high-speed data collecting card, a main processing unit and a high-functional computer. The infrared radiation is focalize on the infrared focal plane detector via the infrared optical lens; each unit on the infrared focal plane detector can convert the infrared radiating signal into electrical signal driven by driving and offset signals provided by the programmable infrared detector driver; clock and triggering signal needed by the programmable infrared detector driver is set by program programming of the high-functional computer which is transmitted to the programmable infrared detector driver by the main processing unit, high-speed data collecting card and high-speed interface. This invention enables designing stuff intuitively ...

Infrared image based hardware processing algorithm effectiveness performance evaluation device and method

The invention discloses an infrared image based hardware processing algorithm effectiveness performance evaluation device and method. The infrared image based hardware processing algorithm effectiveness performance evaluation device is formed by an original infrared image input end, a gigabit network transmission module, an infrared image hardware algorithm processing performance evaluation board, an infrared image output end and an evaluation result display. The infrared image based hardware processing algorithm effectiveness performance evaluation method comprises transmitting an original infrared image into an upper computer and the infrared image hardware algorithm processing performance evaluation board; determining the performance evaluation index information of the infrared image after processing through the infrared image hardware algorithm processing performance evaluation board; displaying an evaluation result through the evaluation result display. According to the infrared image ...

Helmet type infrared temperature measurer and method

The invention discloses a helmet type infrared temperature measurer and a method. The temperature measurer comprises a helmet, and a detector, a detector driving circuit, a signal processing board, a power source board, an SD card storage circuit, an LCD ocular lens, a cell and a storage button which are arranged on the helmet, wherein the detector is arranged just in the front of the helmet, and the LCD ocular lens and the detector are coaxially arranged. The temperature measuring steps comprise steps that: the power source board is provided with a main power source through the cell, the detector driving circuit is matched with the detector, the detector starts to acquire original real-time image data of a target; the detector driving circuit receives the original real-time image data sent by the detector and sends the original real-time image data to the signal processing board for digital image processing, and a temperature information image of the target is acquired; a display chip ...

Image processor team interface bus

The invention discloses an image processor group-interface bus, comprising a host computer and a slave computer. The operation of the bus is realized by a programmable logic device in the image processor. Pins of a bus instruction, a bus claim, a slave computer selection, an IO data wire, a serial communication, a data-packet stop, a slave computer preparation, a slave computer restarting, a data mistake and a bus clock are respectively arranged in the host computer and the slave computer. The slave computer is controlled by the host computer by the bus instruction, the slave computer selection and the serial communication, etc. The interface bus works in a cut-off mode. The IO data wire adopts a parallel synchronous transmission mode and is shared by a plurality of processors. The data-packet transmission is realized by a channel mode between the processors, and the length of data-packet can be changed; a packet head includes computer number and channel number so as to realize the quick ...

Optimal order fitting method based on high-order ghost-imaging image quality model

The invention discloses an optimal order fitting method based on a high-order ghost-imaging image quality model. The method comprises the following steps: determining an order corresponding to the best image quality of high-order ghost imaging, carrying out high-order treatment on reference images and objective images by virtue of ghost-imaging simulation experiment, simulating a rebuilt image and calculating the contrast ratio and the carrier to noise ratio, combining a high-order ghost-imaging image quality model, determining the best orders corresponding to the high-order ghost imaging at different effective pixel number conditions and numerically fitting a relation between the best orders and the effective pixel numbers. According to the method, the rebuilt image data information is used as a basis; the influence of contrast and carrier to noise ratio of the image quality is comprehensively considered. The image quality evaluation is relatively comprehensive, and well matches the actual ...

Method for enhancing EMCCD image

The invention discloses a method for enhancing an EMCCD image. The method comprises the steps: firstly carrying out the hard threshold filtering and alpha-rooting enhancement processing of the EMCCD image; and then carrying out the histogram processing of the EMCCD image after hard threshold filtering and alpha-rooting enhancement processing, and adjusting the grayscale range of the EMCCD image under the condition of no impact on the visual effect of the EMCCD image according to the threshold value of grayscale pixel number and a grayscale compression rule. The method not only can effectively enhance the detail and other feature information of the EMCCD image, but also can achieve the compression of the EMCCD image under the condition of no impact on the visual effect.

Infrared thermometer data analysis processing platform and method

The invention discloses an infrared thermometer data analysis processing platform comprising a central processing unit, a storage module, a human-machine operating interface and an interface module; the storage module, the human-machine operating interface and the interface module are connected with the central processing unit; a TFT LCD (thin-film transistor liquid crystal display) touch screen of the human-machine operating interface or keys are used to transmit control signals to an ARM (advanced RISC machines) chip of the central processing unit; the ARM chip is controlled to receive infrared video data of an infrared thermometer through a video interface, receive network transmission data of the infrared thermometer through a network transmission interface or receive video data or infrared image data in an SD (secure digital) storage card through an SD storage card interface; the ARM chip of the central processing unit analytically processes the infrared video data or infrared image ...

Non-scanning 3D (three dimensional) laser imaging radar

The invention provides a non-scanning 3D laser imaging radar. The non-scanning 3D laser imaging radar comprises a mode-locked laser, a beam splitter, a PIN photodiode, a laser beam expander, a multi-channel parallel timing device, a binocular, an MCP (Multi Chip Packaging) image intensifier, an optical fiber array, an avalanche photodiode array, a data acquisition module and a computer; the connection mode of the optical fiber array with a signal input end of the avalanche photodiode array is determined by a d- separation matrix A. The non-scanning 3D laser imaging radar can achieve three-dimensional imaging of high point cloud acquisition rate and high resolution.

High-precision digital phase-locked amplifier and weak signal detection method

The invention designs a high-precision digital phase-locked amplifier and a weak signal detection method, and the method comprises the following steps: inputting an original signal to be detected by a detector, and forming an input signal through preprocessing circuits such as a filter and an amplifier; a sine and cosine signal which has the same frequency with an input signal and has a fixed phase difference is calculated through a direct digital frequency synthesis technology, and is multiplied by the input signal, so that a phase-sensitive detection function is realized; respectively carrying out low-pass filtering on the two multiplied components through a designed filter; and finally, the amplitude and the phase of the original input signal are calculated through the vector operation module. According to the invention, by designing and optimizing the phase-locked amplification algorithm, the accuracy of weak signal detection is effectively improved, and related information such as ...

Laser radar total wave signal analyzing method

The invention provides a laser radar total wave signal analyzing method. According to the method, when updating is carried out every time, one of the parameters including the number k of echo signals, noise signals B incident to a laser radar detector, the peak position t0 of each echo signal and the peak amplitude beta of each echo signal is selected at random so that updating can continue to be carried out; the parameter k is updated based on the Metropolis algorithm thought, the parameter B is updated based on the Metropolis algorithm or the simulation tempering algorithm thought, and the parameter t0 and the parameter beta are respectively updated based on the simulation tempering algorithm thought. According to the laser radar total wave signal analyzing method, total wave signals of targets with unknown characters can be processed quickly without being affected by the signal noise ratio of the total wave signals.

Design method for adaptive dynamic range of micro-bolometer

The invention discloses a design method for an adaptive dynamic range of a micro-bolometer. A bias voltage generation module is used for providing an analog signal required by normal work for a detector; a digital signal is transmitted to the detector through an interface; an analog-digital conversion chip is used for receiving an analog video signal from the detector and performing gain amplification and bandwidth limitation, and performing analog-digital conversion on the processed signal to change the processed signal into a digital signal and transmit the digital signal to an image processing board; a central processing unit on the image processing board is used for receiving a digital video signal from a front-end driving circuit and performing statistical mean value calculation and threshold judgment on all images so as to realize adjustment of the dynamic range of the detector; and finally the signal is converted into a video signal of a phase alternation line (PAL) system to be ...

Image processor team interface bus

The invention discloses an image processor group-interface bus, comprising a host computer and a slave computer. The operation of the bus is realized by a programmable logic device in the image processor. Pins of a bus instruction, a bus claim, a slave computer selection, an IO data wire, a serial communication, a data-packet stop, a slave computer preparation, a slave computer restarting, a datamistake and a bus clock are respectively arranged in the host computer and the slave computer. The slave computer is controlled by the host computer by the bus instruction, the slave computer selection and the serial communication, etc. The interface bus works in a cut-off mode. The IO data wire adopts a parallel synchronous transmission mode and is shared by a plurality of processors. The data-packet transmission is realized by a channel mode between the processors, and the length of data-packet can be changed; a packet head includes computer number and channel number so as to realize the quick ...

FPGA-based scene non-uniformity correction method and device

The invention discloses an FPGA-based scene non-uniformity correction method. The FPGA-based scene non-uniformity correction method includes the following steps that: each frame of original image data is stacked with correction parameters in a parameter storage SRAM and is transmitted to a monitor so as to be displayed; two adjacent frames of corrected image data are stored in the image storage SRAM, and respective line and column projection vectors of the two frames of image data are determined; formed projection vectors are filtered and are stored in a corresponding internal RAM; line correlation matrixes between corresponding line projection vectors and column correlation matrixes between corresponding column projection vectors of the two frames of images can be determined according to the projection vectors stored in the internal RAM, and relative displacement of the two frame of images can be obtained; an overlapping area of the two adjacent frames of images is judged, and a minimum ...

Distance estimation method based on photon counting type laser radar signal reconstruction

The invention provides a distance estimation method based on photon counting type laser radar signal reconstruction. The distance estimation method based on the photon counting type laser radar signal reconstruction comprises the steps of: randomly selecting any one of a noise signal B entering a laser radar detector, a peak value position t0 of each echo signal and a peak value amplitude beta of each echo signal for continuous updating operation while each updating operation; updating the parameters above by adopting an Metropolis algorithm thought. The distance estimation method based on the photon counting type laser radar signal reconstruction can reconstruct target signals with unknown characteristics rapidly, and accordingly finish the distance estimation.

Target optimal detection spectral coverage imaging detecting method based on narrow band scanning

The invention discloses a target optimal detection spectral coverage imaging detecting method based on narrow band scanning, and the method comprises the following steps: firstly performing the sub-spectrum imaging on a scene by using an acousto-optic tunable filter, then decomposing each sub-spectrum of the scene into a plurality of pseudo single target images in each spectrum according to a gray similar manner, obtaining a mirror image of each pseudo single target image under other spectrums by using a coordinate mapping manner so as to obtain all decomposed targets detected under each spectrum and the mirror images of the decomposed targets; measuring the imaging quality of the target by using a step difference value based on a target edge and the target, and selecting optimal target images from each group of pseudo single target images and the mirror images thereof; and finally carrying out overlapping and gray compressing on all selected optimal target images to form a final detection ...

Design method and system application of large-dynamic-range infrared radiation source test system

The invention discloses a design method and system application of a large-dynamic-range infrared radiation source test system, and belongs to the technical field of infrared imaging, and the radiation temperature test range is-30 DEG C to 1200 DEG C. The designed large-dynamic-range infrared radiation source test system comprises a blackbody radiation source array, a secondary reflection optical system, a maneuvering guide rail, a control system and an optical machine box body. Ten black bodies with different temperature ranges are used to construct a test target with a large dynamic range. An independent radiation output light path is designed for each black body through a secondary reflection optical system. Radiation signal light paths of ten black bodies can be selectively output by regulating and controlling the displacement of the maneuvering guide rail, so that real-time switching of test targets is realized. The control system is responsible for controlling and monitoring the working ...

CCD-image-based method for reducing noise by using frame-to-frame correlation

The invention discloses a CCD-image-based method for reducing noise by using frame-to-frame correlation. The method comprises the following steps: obtaining relative displacement of images of two adjacent frames through an image registration method, determining a folding area of frames of the two adjacent frames through the displacement, then carrying out frame-to-frame accumulation filtering on the folding area, applying an intra-frame filtering algorithm to non-folding areas, wherein the algorithm is also capable of adjusting the number of folding frames in a self-adaptive manner and has a multi-stage adjustable function. The innovation point of the invention is characterized by firstly carrying out image registration, and then selecting different intra-frame filtering algorithm according to a registration result; the signal to noise ratio of video images is increased; meanwhile, the noise of motion images can be well reduced.

Method for detecting long-distance ground moving object via rotary infrared detector

The invention discloses a method for detecting a long-distance ground moving object via a rotary infrared detector. The method comprises that movement compensation parameters of the infrared detector are calculated via image information, and a first detection result of the object is obtained via background update; scene information is extracted, and motion information of the object and background is extracted from a scene according to the first detection result of the object in a sparse optical flow method; and correlation between the motion information of the background and the object is calculated to realize final object detection. According to the method, the rotary infrared detector is employed to solve the problem of small detection area caused by low resolution of an infrared detector, the correlation between the motion information of the background and the object can be used to solve the problems including object shielding, object overlap and parallax in a present detection tracking ...

Design method for adaptive dynamic range of micro-bolometer

The invention discloses a design method for an adaptive dynamic range of a micro-bolometer. A bias voltage generation module is used for providing an analog signal required by normal work for a detector; a digital signal is transmitted to the detector through an interface; an analog-digital conversion chip is used for receiving an analog video signal from the detector and performing gain amplification and bandwidth limitation, and performing analog-digital conversion on the processed signal to change the processed signal into a digital signal and transmit the digital signal to an image processing board; a central processing unit on the image processing board is used for receiving a digital video signal from a front-end driving circuit and performing statistical mean value calculation and threshold judgment on all images so as to realize adjustment of the dynamic range of the detector; and finally the signal is converted into a video signal of a phase alternation line (PAL) system to be ...

Self-adapted digitalization method and its circuit for infrared plane array

The present invention provides an adaptive digitizing method of infrared focal plane array and its circuit. The focal plane array of the method transmits analog signals changed by the scene changes, the analog signals enter in A/D chip which input range is adjusted after passing the wave filtering, FPGA chip monitors digitizing output of A/D chip at any times and judges the output; serial configuration D/A chip is reconfigured to provide different bias voltages to A/D chip and adjust output range of analog signals of A/D chip, thus, this adjusts digital output range of A/D chip and completes adaptive digitizing of the focal plane array. The digital digit of the A/D device is utmost occupied, at the same time eliminating the blind element interference, the detail resolving capability of the image is greatly enhanced; the threshold delta not only ensures that the adaptive digitizing method of infrared focal plane array has great applied range, but also ensures that the method is not frequent ...