2results about How to "Save resource space" patented technology

The present application belongs to the field of image feature analysis, and specifically refers to a skin image feature analysis method based on a reflective confocal microscope, which comprises distortion correction, image preprocessing and global perception. Through GPU accelerated lookup table encoding and decoding technology, the efficiency of distortion correction is significantly improved, the number of memory access is reduced, real-time and efficient image processing is realized, the quality of the skin medical image is improved in combination with medical imaging technology, which has great significance for clinical application; in combination with feature extraction, matching and global optimization technology, a high-precision global skin image is obtained and updated, effectively solving the geometric distortion problem caused by probe jitter or inter-frame alignment error, and being able to adapt to the instability of artificial handheld operation, generating a global skin image in single-point imaging of a shaking skin lesion position, and ensuring the continuity and consistency of image acquisition.

This invention discloses an orthogonal down-conversion method for digital intermediate frequency (IF) signals, primarily addressing the problem of high computational complexity in existing orthogonal digital down-conversion processing methods. The implementation involves decimation and mixing / filtering of the digital IF signal. Decimation occurs every three clock cycles, extracting one-quarter of the digital IF signal. Mixing / filtering involves multiplying the convolution coefficient sequence of a low-pass filter with the sine and cosine local oscillator signals generated by a numerically controlled oscillator (CNC) to obtain the convolution coefficient sequences of the I-path and Q-path filters. These sequences are then convolved with the decimated digital IF signal sequence and summed to obtain the I-path zero-IF signal and Q-path zero-IF signal, which are then transmitted to other signal processing modules in the FPAG system. This invention reduces the computational complexity of orthogonal down-conversion, lowers hardware resource consumption, and can be applied to general radar signal processing systems.