The colour preference control based on two-colour combinations

Abstract

ABSTRACT This paper proposes a framework of colour preference control to satisfy the consumer’s colour related emotion. A colour harmony algorithm based on two-colour combinations is developed for displaying the images with several complementary colour pairs as the relationship of two-colour combination. The colours of pixels belonging to complementary colour areas in HSV colour space are shifted toward the target hue colours and there is no colour change for the other pixels. According to the developed technique, dynamic emotions by the proposed hue conversion can be improved and the controlled output image shows improved colour emotions in the preference of the human viewer. The psychophysical experiments are conducted to investigate the optimal model parameters to produce the most pleasant image to the users in the respect of colour emotions. Keywords: complementary colour, colour harmony, hue conversion 1. INTRODUCTION The nature and scope of the visual media is undergoing dramatic change as it enters the digital era. Portions of the formerly distinct photographic, electronic, software, television, computer, and printing industries are converging into a more generic imaging industry. Especially, there has been an explosion of new TV technologies to enhance the image quality but still now, consumers want more from “the visual media” and scientists and engineers still create technologies that expand the capabilities of the visual media. From now on, the visual media need to find something different to stir up the customer’s imagination and emotion. Among many factors which can affect the visual media, colours play an important role for customers in making decisions on what they like and dislike. The aspects, or qualities of colour, refer to colours and colour combinations that evoke certain emotional responses. This has triggered the development of various algorithms for colour processing and preference until now [4] and has more recently resulted in a large number of psychophysical studies about colour emotions and colour preference. [5] Simply, emotions are directly related to our colour attention. They limit what can attract and hold our attention. Emotions are triggered by personal interests and perspectives such that they address a practical concern associated with readiness to act. The abovementioned influence of colour on the way people feel and even human’s emotions and perceptions has been known for a long time. People often a ssociate colours with their emot ions, where light colours are known to help people feel more relaxed whilst dark colours create a more serious atmosphere. Colour does not exist as a single entity. Single colours can be arranged sequentially according to their place in the spectrum. This is however not possible for colour combinations, as is obvious from a glance at different images. Therefore, consideration of colour harmony seriously affects the emotions. In visual experiences, colour harmony is something that is pleasing to the eye. It engages the viewer and it creates an inner sense of order, a balance in the visual experience. When something is not harmonious, it's either boring or chaotic. At one extreme is a visual experience that is so bland that the viewer is not engaged. The human brain will reject under-stimulating information. The human brain rejects what it can not organize, what it can not understand. The visual task requires that we present a logical structure. Colour harmony delivers visual interest and a sense of order. In summary, extreme unity leads to under-stimulation, extreme complexity leads to over-stimulation. Colour harmony is a dynamic equilibrium. Comparing with the previous studies fo cusing on the preferences of single co lours and memory colours of well known objectives based on patches, the pathway of the colour related emotion-shift by adjusting the most harmonious colour combination in the actual image is studied.