Patent ID: 9654706
Date: 2017-05-16
CPC Classifications: G06T,H04N

Claim:
1. A method for reducing blurs of TDI-CCD camera images, in which the target surface that supports the TDI-CCD camera is set to be n columns and m rows, wherein the method for reducing blurs includes the following steps: S1. establish a coordinate system of the image: the direction of the number of pixels on the TDI-CCD camera area array, which is the direction of columns, is the Y axis, while the direction of the grades of the pixels on the TDI-CCD camera area, which is the direction of rows, is the X axis, the upper left corner of the image is the starting point of the coordinate system, wherein the coordinate for the first row and first column is (0,0); S2. read the area array images of the TDI-CCD camera outputted from each integration and carry out numbering of the images: the images are sequentially numbered as G S3. carry out decomposition on the area array images: decompose each image read in S2 by rows, each area array image outputted from the integration grades is decomposed into m rows, each row having n pixels, each row forms a one-dimensional digital signal after decomposition, the signal length being n, the first N pixels are extracted from each one-dimensional digital signal, respectively forming one-dimensional digital signal series that is recorded as f(t), wherein 0≦t≦m, 0≦N≦n; S4. according to the one-dimensional digital signal series of S3, construct similarity matching rules for two one-dimensional signal series, including: wherein w r is the number of iterations, A and B are constants; wherein, h represents every point that matches i; S5. Conduct offset calculation according to the neighborhood matching calculation results of S4, obtain the tie points in the images, including: S6. conduct spatial geometric correction on the images according to x S7. repeat step S3 to step S6 on subsequent images relative to the benchmark image G S8. superimpose the one-dimensional signal series having the same instant field of view in the corrected images in the coordinate system to become the first row of digital image of the images with the oscillation effects removed, repeat step S3 to step S8, arrange each row of the superimposed image obtained with the reduced oscillation effects according to spatial and chronological order to form digital images with the oscillation effects reduced.