HEALPIX DCT technique for compressing PCA-based illumination adjustable images.
John SumChi-Sing LeungRay C. C. CheungTze-Yui HoPublished in: Neural Comput. Appl. (2013)
Keyphrases
- illumination conditions
- image data
- imaging conditions
- lighting conditions
- image retrieval
- image database
- three dimensional
- image features
- image set
- test images
- global illumination
- partial occlusion
- illumination invariant
- image classification
- transformed images
- white light
- pixel intensities
- single image
- pixel values
- digital photographs
- image registration
- illumination correction
- discrete cosine transform
- principal components
- computer graphics
- varying illumination
- principle component analysis
- visible light
- object recognition