METHOD FOR OBTAINING HIGH SPATIAL RESOLUTION IMAGES BY OPTO-ELECTRONIC OBSERVATION TOOL FOR REMOTE OBJECTS Russian patent published in 2023 - IPC G01S17/06 

FIELD: optical observation.

SUBSTANCE: invention is related to obtaining information by the optical method, which ensures detection and determination of position of objects in three-dimensional space by an optoelectronic system, which makes it possible to determine their coordinates and geometric features, the distance to the observed objects. The claimed method for obtaining images of high spatial resolution by an optoelectronic means of observing distant objects is achieved by simultaneous registration of the entire set of rays from the observed objects in the full body angle of observation by the first high-resolution digital source and additional digital registration of sets of different sets of directions of rays from objects in the same observed space second optical system. Next, the images of the formed space layers of the additional recording system are expanded to the resolution of the first optical recording system by replacing the detail filters of the discrete wavelet transform in a known manner. In this case, the second optical system is aimed at the same volume of space and performs algorithmic formation of images of objects in each of the obtained layers of space, detects observed objects in them, determining the range of objects by the distance of the layer of space. The formation of selected remote layers of space is carried out on the basis of linear combinations of subaperture signals of photodiodes of the matrix photodetector of the additional registration system, while objects are detected by extracting information features from the array of received processing data. Calculation of coordinate and geometric features of objects containing informative elements of images of objects of the same scene is performed after multiplexing images of selected layers with a high-resolution image. The multiplexing process consists in the complementary combination of data obtained in different information ranges of the first and second registration systems. Complexing in different digital information ranges is achieved by decomposing the image of the first digital source and each of the set of images of the second digital source into low-frequency (LF) and high-frequency (HF) components, separate processing of the LF and HF image components, based on the principle of weighted summation for each pixel, formation of the resulting image. All images are subjected to multilevel decomposition using the Haar wavelet by fast discrete stationary two-dimensional wavelet transform in order to obtain an approximating component. From the values of the matrices of energy characteristics of pixels at all levels of decomposition for each image, all detailing ones are filtered, the noise microstructure is eliminated, correction functions of brightness and correction functions of contrast are calculated for each decomposition. The formation of a synthesized image of a high-resolution space layer is performed by reconstructing the components, taking into account the replacement, using the inverse fast discrete stationary two-dimensional wavelet transform, while matching the brightness range of the resulting image with the parameters of the optoelectronic system.

EFFECT: increase of the resolution and accuracy of determining the coordinates and geometric features of objects in the observed three-dimensional space, as well as the possibility of quick search and detailed recognition of objects in the observed area of space at any given time.

1 cl, 16 dwg, 2 tbl