This paper proposes a review of thirty years of the development of demosaicing algorithms used in digital camera for the reconstruction of color image. Most recent digital camera used a single sensor in front of a color filter array is placed. This sensor sample a single chromatic value per spatial position and an interpolation algorithm is needed for the definition of a color image with three components per spatial position. This article shows that the whole signal and image processing technics have been used for solving this problem. Moreover, a new method proposed recently by the author and collaborators is decribed. This method based on a model of chromatic sampling by the cones in the retina highlights the nature of spatio-chroma...