Mei-Sen Pan, Jing-Tian Tang and Xiao-Li Yang. Movement Invariants-based Algorithm for Medical Image Tilt Correction. International Journal of Automation and Computing, vol. 7, no. 4, pp. 543-549, 2010. DOI: 10.1007/s11633-010-0538-0
Citation: Mei-Sen Pan, Jing-Tian Tang and Xiao-Li Yang. Movement Invariants-based Algorithm for Medical Image Tilt Correction. International Journal of Automation and Computing, vol. 7, no. 4, pp. 543-549, 2010. DOI: 10.1007/s11633-010-0538-0

Movement Invariants-based Algorithm for Medical Image Tilt Correction

  • In this paper,the edge detection for a medical image is performed based on Sobel operator,and the bounding box is obtained,by which the effective medical sub-image is extracted.Then,the centroid and the normalized central moments of the medical sub-image are calculated,and the rotation angle is obtained by minimizing the second-order central moment based on its rotation invariance.Finally,the whole medical image is rotated around the centroid by- to correct the tilted image.Furthermore,inspired by the uniformity degree of the image,the rotation angle is revised,which achieves a better correction effect and performance.The experimental results show that the proposed algorithms are fairly reliable and accurate for the determination of tilt angles,and are practical and effective tilt correction techniques.
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