proposed a robust color image enhancement
algorithm [6]. The algorithm can enhance color
image without distortion, but the edges of the color
image could not be handled well. The algorithm
use Gaussian filter to estimate background image.
Gaussian kernel function is isotropic, which leads
to the inaccurate estimation of background image,
resulting in the halo phenomenon. Considering the
above two algorithms, a new bio-inspired color
image enhancement algorithm is proposed by the
author [7]. A novel algorithm based on I luminance-
Reflectance Model for Enhancement (IRME) has
been developed and proven to be very effective for
images captured under insufficient or non-uniform
lighting conditions [8]. The algorithm is based on
luminance perception and processing to achieve
dynamic range compression while retaining or
enhancing visually important features. Conventional
image enhancement techniques such as global
brightness and contrast enhancement, gamma
compression and histogram equalization, are
incapable of providing satisfactory enhancement
results for underexposed or saturated images. The
acquiring of the background image is important in
many color image enhancement technologies and
we also need to estimate the background image in
this algorithm. In traditional algorithms, only
distance and luminance information of pixels is
considered in estimation of background image.
They all overlook the important information of color
image—color information.