The Design And Implementation Of A Color Space Conversion System

Printing companies will use different equipment from different manufacturers normally.Therefore,in the printing process,the color of the image needs to be passed between different devices.The way and the process the equipment expresses the color is different,so the same group of color performance differences.The problem of color deviation has brought a lot of trouble to the printing production.Thus,it is necessary to control and adjust the image by color space conversion to achieve the desired image effect when displayed or printed on different devices.The desired image effect is to minimize the color distortion when passing the graphic color data information between devices with different color characteristics and the color of the image is matched as much as possible from the input to the display and then to the output.In order to complete the color space conversion between different devices and realize the simulation of the printing production workflow,this thesis realizes the equipment management,equipment attribute management,measurement chart generation,ICC profile management,DeviceLink management,color management,image preview and report generation.(1)Device management and device attribute management complete the definition of various devices and their device properties.Define devices in a print production environment by implementing device management function.By implementing the device attribute management function,the external conditions of the device operation are defined according to the type of the device.(2)Measurement chart generation,ICC profile management and DeviceLink management determine the color characteristics of the device by color data.The data needed to create the ICC profile is generated by implementing the measurement chart function.Through the research on color space representation and transformation,ICC profile and color gamut(The color range that the device can represent)mapping,the model and algorithm of color space conversion are designed,namely matrix model and look-up table model.This thesis implements the ICC profile management function,uses the model and algorithm of color space conversion,combines the data generated by the measurement chart function,generates the conversion relation for some kind of equipment with certain kind of device attribute,and then creates ICC profile through the transformation relation and the related information.Implementing DeviceLink management function can combine the ICC profiles of two device and generate DeviceLink file.(3)This thesis implements the color management function to organize and manage the equipment and equipment attributes.Image preview and report generation can be implemented by conversing the color of image with the combination of the color characteristics of the devices.The image preview function allows you to preview the effect of image conversion between different devices.By implementing the report generation function,two types of reports are generated:the printed characterization report and the print comparison report.For non-functional requirements,the system has two requirements:ease of use and ease of maintenance.(1)In order to get a good user interface,the JGoodies framework are used to develop the Java graphical interface which meets the needs of modern users for the aesthetic interface.Thus the problem of the software interface style produced by traditional Swing programming is not commensurate with the operating system can be solved.(2)Using a method similar to the design of Swing's model/view,the code is divided into smaller,more generic components.Separate the graphical user interface from the application logic to reduce complexity and improve maintainability.At the end of the thesis,the functional tests of the functional modules of the color space conversion system are carried out respectively.The test results show that the system satisfies the system requirements.