Image Displacement Detection under Low Illumination Using Joint Transform Correlator with Wavelet Denoising
Since joint transform correlator (JTC) cannot directly detect the displacement between reference and target images without adequate exposure, an image displacement detection method using JTC based on log-Gabor wavelet denoising is proposed. The method uses a log-Gabor wavelet transform to denoise the reference and the target image obtained in the condition lack of enough exposure, preserving the phase information of them. Results show that the method can successfully accomplish the motion detection, RMSE of displacement measurement using JTC with wavelet denoising could be within 0.3 pixels under 1/80 of normal exposure. The method improved the detection ability of JTC in the condition of low illumination and low contrast, and has great application prospect under these circumstances.
Q. Li et al., "Image Displacement Detection under Low Illumination Using Joint Transform Correlator with Wavelet Denoising", Applied Mechanics and Materials, Vols. 128-129, pp. 602-606, 2012