On color archival document images, marginal (per-channel) filtering outperforms vector approaches for denoising, while vector approaches outperform marginal for edge detection.
Color space choice for color images segmentation,
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A Comparative Study of Filtering Approaches Applied to Color Archival Document Images
On color archival document images, marginal (per-channel) filtering outperforms vector approaches for denoising, while vector approaches outperform marginal for edge detection.