Multimodal image feature extraction and matching method based on ASIFT (affine scale invariant feature transform)
A multi-modal image and feature extraction technology, which is applied in image analysis, image data processing, character and pattern recognition, etc., can solve the problems of inability to extract and match multi-modal image features, and obtain no results
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[0032] The present invention will be described in further detail below with reference to the accompanying drawings.
[0033] refer to figure 2 , taking two images p1 and p2 as an example, the implementation steps are:
[0034] Step 1: Perform affine transformation processing on the images p1 and p2 respectively according to the ASIFT affine transformation matrix, so that each image forms a group of views.
[0035] (1.1) Sampling the absolute tilt parameter t and the longitude angle parameter φ of the ASIFT affine transformation physical model to obtain all the affine transformation matrices caused by the changes of these two parameters, such as image 3 As shown, the parameter t follows the geometric sequence t=1, a, a 2 ,...,a n to sample, where n=5, the parameter φ is sampled according to the arithmetic sequence φ=0, b / t, ..., kb / t, wherein kb / t<180°, b=72;
[0036] (1.2) Bring the sampled values of t and φ into the matrix in turn I ′ ...
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