Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Color image denoising by chromatic edges based vector valued diffusion   In this letter we propose to denoise digital color images via an improved
geometric diffusion scheme. By introducing edges detected from all three color
channels into the diffusion the proposed scheme avoids color smearing
artifacts. Vector valued diffusion is used to control the smoothing and the
geometry of color images are taken into consideration. Color edge strength
function computed from different planes is introduced and it stops the
diffusion spread across chromatic edges. Experimental results indicate that the
scheme achieves good denoising with edge preservation when compared to other
related schemes.

2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex