A high-precision star position extraction method based on intra-pixel response
An extraction method and pixel technology, applied in the field of space photoelectric remote sensing detection, can solve problems such as errors
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[0021] The present invention will be further described below in conjunction with the accompanying drawings.
[0022] Step 1: Preprocess the image, remove the background and correct the non-uniformity. Calculate the non-uniformity correction coefficient of each pixel according to the existing blackbody calibration data, which is recorded as K(i, j), where i and j are the horizontal and vertical coordinates of the pixel on the detector. The background is Backgoung(i, j). DN(i, j) is the pixel gray value whose coordinates are (i, j) after processing, and DN’(i, j) is the original pixel gray value.
[0023] DN(i,j)=((DN'(i,j)–Background(i,j))·K(i,j))
[0024] Step 2: After the point target is imaged by the optical system, its energy distribution can be described by Gaussian function. Due to the difference in the response within the pixel, when the target moves on a single pixel, the gray value of the pixel also has a certain change. Find the ten frames with the largest gray val...
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