Research On Infrared Texture Synthesis

The project of this dissertation is supported by the National Science Foundation ofChina, named "Research on infrared texture analysis and synthesis"with supported No.60407012.The study on infrared texture synthesis of natural terrain, which is one of the vitalprojects in the fields of infrared scenes simulation, plays a very important role inresearches of the infrared radiance characteristics and infrared imagery properties ofnatural scenes.By analyzing the physical process of forming infrared textures, each of the keysections, which affected the infrared textures mostly, is deeply researched in thisdissertation. The special content and important conclusions are as following:1. The influent of temperature in the space of natural terrains is the prime reason ofinfrared texturing. To study the statistical characteristics of the temperature fields ofnatural terrain is the precondition of infrared texture synthesis. A statistical model oftemperature fields of natural terrain is developed. We can obtain the mean values andstandard variations of temperature fields with the statistical method, by which cansolves the temperature function with multi-random-variables. And the affections totemperature fields by correlation length are analyzed also.2. The models of infrared physical texture are established in this dissertation. Therelationship of function mapping between standard variations, correlation length ofinfrared radiance of natural terrains and the external physical parameters are describedin the models, which can also provide a conversion bridge between the temperaturefields to the infrared radiance fields, and provide theoretic data for infrared textureimages.3. The generation of infrared texture images, as a key process of infrared texturesynthesis, is an operation to converting the infrared radiance fields to the gray levelsdistribution in space in the images. The Markov random field (MRF) models, generallong-correlation (GLC) field models and non-parameter random field models are firstlyintroduced to synthesize the infrared texture images in this dissertation. The models areproved that it can convert the infrared radiance fields to infrared texture imagesavailably.4. A conception, named by infrared apparent textures, is introduced in this paper.To generate the infrared apparent textures, the affections of infrared imaging system arefirstly introduced in the process of infrared texture synthesis. A physics-based model ofstaring infrared imaging system is given to produce the infrared apparent textures. Atlast some infrared apparent textures are synthesized as examples by the models.5. The statistical method of texture analysis is applied to analyze the textureparameters of infrared texture images synthesized by the infrared texture models. Theanalysis results showed that the method of infrared texture synthesis is available. At last,some examples for the application of infrared texture are given.