| In recent years, along with the continuous development of related technologies, the digital image measurement technology has been studied and applied widely with its fast, non-contact and highly of automation. Especially in the field of industrial production, using digital image measurement technology can resolve lots of measurement problems which cannot be resolved through direct contact measurement. However, different objects and parameters to be measured and different measuring purpose make the image measurement system different in many aspects. The main study content of this thesis is image measurement system aiming at irregular objects area measurement, which is valuable.According to the requirements of image measurement system in this subject, each part of the system hardware is designed and appropriate related components are selected. A whole image measurement hardware system is constructed.The methods of image filtering, image segmentation and irregular objects area calculation are researched according to the problem of leather area measurement. Through the analysis and simulation results, suitable image processing methods are chosen and an irregular region area calculation method based on boundary tracking and searching direction analysis is proposed. And it is shown that this method can well realize irregular region area calculation.Irregular objects area measurement system software is developed and its function and structure are analyzed. The development procedure and interface of every software module and the software operation method are stated in details.The accuracy of image measurement system is easy to be affected by many factors. Experiments and error analysis are done to the whole system, including light source, nature of measured objects, and device of the system and so on. The experiments results show that, this system can reach corresponding technical specifications and can realize effective measurement of irregular objects area measurement like leather. |
