Color Image Signal Processing by Quaternion Arithmetic
Something I developed as a graduate student https://www2.cs.sfu.ca/~colour/ between 2003-2005.
Core image processing by quaternion representation can be found in my thesis "Exploration in quaternion colour" (2005) https://summit.sfu.ca/item/9829
Later extended to more applications:
- Quaternion PCA/SVD
- Quaternion compression
- Quaternion edge detection
- Quaternion texture
- Quaternion curvature
- Quaternion segmentation
- Quaternion classification
Reference,
- L. Shi, B. Funt and G. Hamarneh, "Quaternion Color Curvature," in Proc. Imaging Science and Technology Fourteenth Color Imaging Conference(CIC), Portland, Oregon, Nov 10-15, 2008. https://www.slideserve.com/koto/quaternion-color-curvature
- L. Shi and B. Funt, "Quaternion Colour Texture," in AIC'2005 Proc. 10th Congress of the International Color Association(AIC), Granada, May 2005.