:In the field of image processing, it is well known that the gray level transform by Histogram Equalization (HE) for gray scale image effectively enhances the intensity contrast, in general. For the case of color image, the HE processing can be regarded as an elastic transform on the lightness axis in the RGB attribute space of input color image. In this paper, from the expansion of this idea, we propose some elastic transforms based on the HE on Principal Component axis, as arrangement processing for color image that can bring about impressive feeling effects. Moreover, we show the questionnaire survey on the results of the arrangement processing, and discuss the effectiveness in feeling impression.
: This paper proposes a set of three kinds of parameters as an indicator of human affective impression for color image, which can be obtained accompanying calculation of fluctuation such as 1/f fluctuation from power spectrum on the image's spatial frequency domain. Also this paper analyzes a relation between those parameters and feeling impression by changing those parameters' values. And we describe the results of the following two kinds of investigations. (1) Investigation of direct relation between the parameter values of natural images and human impression using the questionnaire survey 1. (2) Investigation as to how good affective impression the change of those parameters' values cause on human being, using questionnaire survey 2. From these results, we show that we can develop a sophisticated color image arrangement processing utilizing those three kinds of parameters.
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