Color Image and Video Enhancement by Emre Celebi, Michela Lecca, Bogdan Smolka

By Emre Celebi, Michela Lecca, Bogdan Smolka

This textual content covers state of the art colour picture and video enhancement ideas. The booklet examines the multivariate nature of colour image/video info because it relates to distinction enhancement, colour correction (equalization, harmonization, normalization, balancing, fidelity, etc.), noise removing and smoothing. This booklet additionally discusses colour and distinction enhancement in imaginative and prescient sensors and functions of photograph and video enhancement.

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19h are respectively the demosaiced results obtained from algorithms [13, 17, 24, 27, 46, 52, 62]. It can be observed that the VCD, DLMMSE and LPA algorithms recover fine texture patterns and almost completely suppress the introduction of unpleasant false colors with respect to other methods. Another example is given in Fig. 20, which shows a cropped region of test image 10 and the corresponding demosaiced images. In this example, a different set of demosaicing algorithms is selected for comparison.

The estimate of G 2. A five-coefficient FIR filter designed by [4, 44] can also explain the above interpolation equations, for example, Eq. 20a). The green components in a CFA image is sampled with a factor of 2. 26) 2 Image Demosaicing 27 Fig. 11 Frequency response of the filters h0 and h1 [44] where G(ω) and Gs (ω) denote the Fourier transform of the original green plane and of the subsampled green plane respectively. 5 used in bilinear interpolation is attempted to remove the aliasing component 1/2G(ω − π), but as shown in Fig.

The optimal choices for the weighting factors are estimated by minimizing the average MSE of a large number of demosaiced images. In comparison with the interpolators of ACPI, incorporating the sharp transition term could allow to undertake high-frequency information in the green plane estimation [35]. The demosaicing methods introduced so far explicitly select one direction for interpolation. In this way, the information provided by other directions may be ignored. Hence, using a weighted sum of estimates from different directions instead was considered.

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