彩色数码提花机软件核心技术的研究
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摘要
彩色提花作为纺织工艺的一种,是对色彩学、视觉理论、计算机图像处理等技术的综合运用。该工艺利用有限的色彩资源(一般为6~10种颜色)合理地组合、搭配出彩色图像所表现的效果。配色方案是彩色数码提花的核心技术,国内在该领域的研究尚处于初级阶段。
     为了促进计算机辅助技术在纺织中更好地应用,本文对彩色数码提花中的配色方案、图像去噪、提花模拟等方面进行了研究。主要研究成果总结如下:
     (1)提出了一种用于彩色数码提花的配色方案的设计、生成方法。根据选定的六种颜色的纱线,为标准256颜色表中的每一种颜色设计对应的提花方案。本文设计的配色方案具有以下特点:①纱线颜色选择时不再需要人工干预;②通过减少纬纱数量降低了工程难度;③解决了提花织物背面凌乱的问题;④目前的彩色提花织机只需稍作改动便可使用本文提供的配色方案。如此一来,不仅提高了生产效率,而且开阔了彩色数码提花织物的应用市场。
     (2)根据彩色数码提花的技术特点,提出了一种基于统计的、可保持边缘的彩色数字图像噪声处理算法。本文提出的算法将噪声分为孤立噪声和边缘噪声,对具体类型的噪声采用不同的去噪方法,打破了传统上对整幅图片采用单一处理方法的限制。实验表明,本文的去噪算法在去噪能力和保持边缘方面均能取得令人满意的效果,且去噪后的图像质量有了明显的提高。
     (3)对所研究的核心技术进行了综合应用。以本文的研究内容为核心,加入绘图、提花模拟、数据传输等功能,搭建了一个彩色数码提花CAD的框架。
As one kind of textile technologies, color jacquard weave involves chromatology, vision theories and computer image processing. With this technology, both pattern and color effects of color images can be expressed in jacquard fabrics by arranging and matching limited color resources (generally 6 to 10 kinds of colors). Color scheme is deemed to be the core technology in color jacquard weave, and research on this field is still at the primary stage in China.
     In order to promote the application of computer aided technology in textile craft, this thesis does researches on color schemes, image denoising and fabric simulation in color digital jacquard CAD. The researches in this thesis can be summed up as follows:
     . A new method for designing and generating color schemes is proposed, which is suitable for color digital jacquard weave. Through this method, the jacquard scheme for each color in standard 256 color table can be designed with 6 different color yarns. The color schemes designed in this thesis have such features as: (?) Manual operations are avoided in the process of yarn color selection; (??) Engineering difficulties are reduced through lessening the number of the yarns used for the weft; (???) The back side of the jacquard fabric is no longer in a mess; (?v) With only a few changes, the new color schemes can be comfortably applied to the present jacquard machines. In this way, not only the production efficiency can be improved, but also the application market of color digital jacquard technology can be broadened.
     II. In the light of the characteristics of color digital jacquard technology, a statistics-based denoising algorithm for color digital images is put forward, which is capable of preserving the edges. The algorithm divides the noises into isolate noises and edge noises. And different methods are adopted to process different kinds of noises, instead of treating the whole image with one method in traditional algorithms. Experimental results show that: the new algorithm not only have strong ability to eliminate noises, but also can preserve the edges well. Besides, after denoising, the quality of the image is obviously improved comparatively.
     III. Put the core technologies of this thesis into comprehensive application. Centering on the researches in this thesis, a color digital jacquard CAD framework is set up by adding some auxiliary functions, such as graph design, jacquard simulation and data transmission.
引文
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