Hue-Preserving Color Image Processing with a High Arbitrariness in RGB Color Space

This paper describes a new system for extracting and classifying bibliography regions from the color image of a book cover. The system consists of three major components: preprocessing, color space segmentation and text region extraction and classification. Preprocessing extracts the edge lines of the book and geometrically corrects and segments the input image, into the parts of front cover, spine and back cover. The same as all color image processing researches, the segmentation of color space is an essential and important step here. Instead of RGB color space, HSI color space is used in this system. The color space is segmented into achromatic and chromatic regions first; and both the achromatic and chromatic regions are segmented further to complete the color space segmentation. Then text region extraction and classification follow. After detecting fundamental features (stroke width and local label width) text regions are determined. By comparing the text regions on front cover with those on spine, all extracted text regions are classified into suitable bibliography categories: author, title, publisher and other information, without applying OCR.

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Color Systems and Color Image Enhancement Methods

ECTI Transactions on Computer and Information Technology (ECTI-CIT) ◽

10.37936/ecti-cit.2016102.75141 ◽

1970 ◽

Vol 10 (2) ◽

pp. 97-110

Author(s):

Akira Taguchi

Keyword(s):

Image Enhancement ◽

Color Image ◽

Color Space ◽

Histogram Equalization ◽

Color Image Processing ◽

Saturation Intensity ◽

Color Image Enhancement ◽

Color System ◽

Hsi Color Space ◽

Rgb Color Space

There are many color systems. Some systems are correspond to the human visual system, such as the Munsell color system. Other systems are formulated to ease data processing in machines, such as RGB color space. At first, Munsell color system is introduced in this paper. Next, RGB color system and hue-saturation-intensity (HSI) color system which is derived from RGB color systems are reviewed. HSI color system is important, because HSI color system is closely related to Munsell color system. We introduce the advantage and drawbacks of the conventional HSI color space. Furthermore, the improved HSI color system is introduced. The second half of this paper, we introduce a lot of color image enhancement methods based on the histogram equalization or the differential histogram equalization. Since hue preserving is necessary for color image processing, intensity processing methods by using both intensity and saturation in HSI color space are reviewed. Finally, hue preserving color image enhancement methods in RGB color system are explained.

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The Relation between Color Spaces and Compositional Data Analysis Demonstrated with Magnetic Resonance Image Processing Applications

Austrian Journal of Statistics ◽

10.17713/ajs.v47i5.743 ◽

2018 ◽

Vol 47 (5) ◽

pp. 34-46

Author(s):

Omer Faruk Gulban

Keyword(s):

Magnetic Resonance Imaging ◽

Image Processing ◽

Data Analysis ◽

Magnetic Resonance ◽

Compositional Data ◽

Color Image ◽

Color Space ◽

Color Image Processing ◽

Compositional Data Analysis ◽

Resonance Imaging

This paper presents a novel application of compositional data analysis methods in the context of color image processing. A vector decomposition method is proposed to reveal compositional components of any vector with positive components followed by compositional data analysis to demonstrate the relation between color space concepts such as hue and saturation to their compositional counterparts. The proposed methods are applied to a magnetic resonance imaging dataset acquired from a living human brain and a digital color photograph to perform image fusion. Potential future applications in magnetic resonance imaging are mentioned and the benefits/disadvantages of the proposed methods are discussed in terms of color image processing.

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