Jacquard Fabric Flowers Pretreatment System

Jacquard Pattern Pre-processing System is an important part of Jacquard CAD System. Jacquard CAD system can help designer to design jacquard weaves. It improves the traditional jacquard technology and promotes the automatic level of jacquard industry. Generally speaking, Jacquard CAD system is made of four parts: Image scan input & image color quantization part, Image processing part, Jacquard technical part and Jacquard output part. The main purpose of this thesis is to enhance the Jacquard Pattern Pre-processing System of original JCAD system produced by Jinwei Automation Co., Zhejiang University, including the Image scan input & image color quantization part and Image processing part.Due to the customers' requirement, this paper put forward a Jacquard Pattern Pre-processing System based on multi-layer processing and vector editing. This paper enhances the Jacquard Pattern Pre-processing System from aspects as following:1) In Image-Input part, this paper provides a scanner Image-Acquire program in accordance with TWAIN specification developed using Delphi. And it is enhanced with scan preview function by which user can quickly scan the whole image in low resolving capability and can locate the area that is really wanted.2) In Color-Quantization part, this paper improves the original "Variable Ball'method, introduce an interactive method to improve the color quantization effect.3) Introduce vector editing system to Jacquard Pattern Pre-processing System, design a vector editing system using Object-Oriented Composite Pattern.4) Introduce multi-layer processing function to Jacquard Pattern Pre-processing System, provide a multi-layer VCL component to paint and manage layers, supporting bitmap layer and vector layer.5) Introduce R2V (Raster to Vector) function to Jacquard Pattern Pre-processing System, in order to change raster Jacquard image to vector image. Describes a methodof changing Raster Jacquard images to Vector image based on the characters of jacquard imageThis method traces the contour of color blocks and then fit he contours by the Least-Square-Method using Bezier curves.