Min-Joon Yoo

Perceptually-based Color Assignment

Color assignment is a complex task of incorporating and balancing area configuration, color harmony, and users intent. In this paper, we present a novel method for automatic color assignment based on theories of color perception. We define color assignment as an optimization problem with respect to the color relationships as well as the spatial configuration of input segments. We also suggest possible constraints that are suitable for task‐specific purposes and for enhancing visual appeal. Our colorization scheme is useful in many applications such as infographics, computer‐aided design, and visual presentation. The user study shows that our method generates perceptually pleasing results over a variety of data sets.

Generating affective music icons in the emotion plane

In this paper, we discuss the generation of icons that represent the emotion expressed in music. We use the emotion plane for connecting the music with the icon shape affectively. A model to project arbitrary music on the plane is introduced using the result of a user survey and various features of audio signals. Icon shapes are located on the plane from the result of user survey. The icon shape of the input music is obtained by blending neighbor icon shapes of the point of the music on the emotion plane. Using this method, one can easily guess the emotion of music from the corresponding icon shape and find the music he or she wants.

Background Music Generation Using Music Texture Synthesis

This paper suggests a method to synthesize a long background music sequence from a given short music clip in real-time. The copies of input clip are placed with overlapped region, the length of which is computed by random or clip matching method. Based on pitch, rhythm and chord cut criteria, the cutting point of the two clips is computed within the overlapped region. As a result, the two clips are concatenated at the cutting point. Generating some variations such as mirroring, retrograding and transposing of the given music clip makes the synthesized result much more dynamic. Suggested method is especially useful for interactive and real-time applications such as games and web contents.

Creating Musical-Fountain Shows

Spectators greatly appreciate majestic musical fountains such as the Bellagio music fountain in Las Vegas and the Magic Fountain of Montjuic in Barcelona. A plethora of water jets and colored lights gives these fountains a gorgeous appearance. But what further distinguishes them is that their displays are synchronized with accompanying music. Fountains that just make patterns with water jets have now developed into multimedia shows with music, light, and special effects. A musical fountain with synchronized water and music creates an atmosphere that can be exciting or romantic. The fountains in Las Vegas and Barcelona are huge, but smaller musical fountains are now appearing in many urban spaces. Whatever the fountain size, the choreography requires painstaking, expert programming, and their creators can only achieve this after careful analysis of the music. Skilled musical-fountain programmers can spend days or even weeks creating a new performance, but this is expensive. So, they rarely change the routines, and they repeat a limited program every day. For this reason, programmers usually choreograph the routines to classical music or well-known pop songs rather than very new music.

Multi Color Selection Using Color Database

Color plays an increasingly important role in a variety of fields, including computer graphics, computer vision, virtual reality, and augmented reality. Accordingly, it has become important to choose colors that are fit for purpose as well as harmonious. However, selecting harmonious color is not an easy task to the average user. The goal of this study is to reduce the difficulties of choosing color and to choose color combinations with high user satisfaction. We also suggest a new color-picking interface based on our high-preference color combination rule.

Color assignment via region area and color harmony

Unlike an expert, an ordinary user may find it difficult to assign colors to regions when considering harmony and purpose. Various conditions should be considered, such as the size of the arranged region, the relationship between the arranged colors, and the purpose of the color uses. In this study, with these conditions in mind, we suggest a novel method for assigning a color each region. Recently, a large number of psychologists have proposed a new framework for color harmony as an alternative to the traditional color harmony theory. In these studies, experiments were carried out to examine the degree of preference or harmony between colors by a large number of subjects [Ou and Luo 2006] [Szab et al. 2010]. According to Munsell [Munsell 1921], color combinations are balanced or harmonious when stronger colors occupy less space than weaker colors. Balance is achieved when area X value (brightness) X chroma (saturation) is equivalent in two regions. We suggest a new color assignment method based on the theory of Ou and Munsell.