Infrared and Laser Engineering, Volume. 52, Issue 6, 20230169(2023)
Recent progress and prospect of laser imaging processing technology （invited）
Figures & Tables(11)
![The algorithm flow and denoising results of Ref.[21] (a) The process of obtaining VMD parameters through whale optimization algorithm and (b) the de-noising results of the algorithm](/Images/icon/loading.gif){kind=icon}
Fig. 2. The algorithm flow and denoising results of Ref.[21] (a) The process of obtaining VMD parameters through whale optimization algorithm and (b) the de-noising results of the algorithm
Fig. 4. Sources and processing ideas of geometric errors in laser imaging
Fig. 5. Proposed GPDNet architecture for laser imaging information denoising based on Ref.[32]
Fig. 6. Schematic diagram of RPVNet architecture of laser background segmentation network
Fig. 8. An illustration of (a) experimental schematic diagram of reflection tomography and (b) laser image reconstruction results in Ref.[82]
Fig. 9. An illustration of PointFlowNet network structure and target detection process[98]
Fig. 10. An illustration of semantic segmentation network structure and target detection based on CNN[103]
Table 1. Typical methods of laser intensity correction[1-7]
View tableView in ArticleTable 1. Typical methods of laser intensity correction[1-7]
Type of imaging Imaging process description Typical signal processing Typical information processing methods Laser scan imaging[ 1 ]Through the scanning of laser emitting system, we can obtain many kinds of information about the surface reflection signal of the object, so that we can image the object in two or three dimensions. ①Laser Point Cloud Denoising ②Laser Point Cloud Intensity Correction ③Point Cloud Location Correction ④Point Cloud Distribution Processing ①(Single) Photon ranging ②Point cloud 3D reconstruction ③Target detection ④Target tracking Laser array imaging[ 2 ]Laser signals emitted by the array's array of laser emitters can be scanned or directly detected to obtain a variety of information about reflected signals on the surface of a detected object, thus completing 2D or 3D object imaging. ①Laser Point Cloud Denoising ②Laser Point Cloud Intensity Correction ③Point Cloud Location Correction ④Point Cloud Distribution Processing ①(Single) Photon ranging ②Point cloud 3D reconstruction ③Target detection ④Target tracking Laser coherence imaging[ 3 ]Using coherent laser as the light source, two or three dimensional object imaging is achieved by obtaining wavefront phase information through matter diffraction or interferometric radiation distribution. ①Echo Signal Denoising ②Echo Radiation Correction ③Echo Geometry Calibration ④Laser image speckle noise suppression ⑤Laser Image False Removal ①Laser Weak Signal Enhancement ②Laser Range ③Relevance Information Target Reconstruction ④Target detection ⑤High resolution imaging Synthetic aperture laser imaging[ 4 ]By using the small aperture laser imaging system, the image fields of each subsystem are synchronized and the same phase is superimposed into the large aperture system. ①Echo Signal Denoising ②Echo Radiation Correction ③Echo Position Correction ④Laser image speckle noise suppression ⑤Laser Signal Phase Compensation ⑥Laser Signal Motion Compensation ①On-board, airborne laser remote sensing ranging ②Multi-Perspective Target Reconstruction ③Remote sensing target detection ④High resolution imaging Continuous wave laser imaging[ 5 ]Continuous wave laser imaging uses a continuous light signal as the detection signal, based on phase laser ranging technology, and uses single-frequency signal modulation laser. By phase detection of the reflected light signal, the target distance information is obtained, thus achieving high-efficiency imaging. ①Echo signal denoising ②Echo radiation correction ③Echo geometric correction ④Laser signal phase compensation ⑤Laser signal motion compensation ①Laser dynamic ranging ②Target reconstruction (in motion) ③Target detection (in motion) ④Motion target velocity measurement ⑤High-resolution imaging Non-line-of-sight laser imaging[ 6 ]Laser signals may encounter relay obstructions and undergo diffuse reflection during transmission. Sparse information contained in the reflection can be used to create two-dimensional or three-dimensional images of objects that are out of sight. ①Light field noise reduction ②Reflection and echo radiation correction ③Reflection and echo geometric correction ①Non-line-of-sight laser ranging ②Non-line-of-sight 2D/3D target reconstruction ③Non-line-of-sight 2D/3D target detection ④Non-line-of-sight target tracking Correlated photon imaging[ 7 ]Using a single-pixel laser detector for detection, the total radiation value of the target object's information light field is recorded in chronological order. The system calculates the target image by using this value and correlating it with the speckle field matrix of the illuminated object. ①Echo signal denoising ②Echo radiation correction ③Echo geometric correction ④Speckle suppression in laser imaging ⑤Artifacts removal in laser imaging ①Laser remote sensing ranging ②Laser image reconstruction ③Remote sensing target detection ④Anti-interference high-resolution imaging ⑤Laser image encryption
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Yihua Hu, Luda Zhao. Recent progress and prospect of laser imaging processing technology （invited）[J]. Infrared and Laser Engineering, 2023, 52(6): 20230169
Paper Information
Category: Invited paper
Received: Mar. 27, 2023
Accepted: --
Published Online: Jul. 26, 2023
The Author Email: Zhao Luda (zhaoluda@nudt.edu.cn)
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