A Study On Smart Projector System Based On Self-adapted Projection Correction Methods

With the development of visualization technology, virtual reality and ubiquitous computing environment, projector provides wide range and scalable projected images to adapt different scales of projection area which makes various projection devices with projection optics as the core technology play an important role in everyday life. In recent years, portable projector has made breakthrough in many aspects including display lumens, high resolution pixel quality and manufacturing costs. However, problem arises when portable projectors are used in daily living environments and specific visualization environments since projected image suffers from interferes with visual perception in complicated projection display environment not to mention cumbersome manual projection image correction method. All the problems mentioned above greatly limit the application range of portable projectors.In this context, researches in adaptive correction algorithms for projection image and novel intelligent projection systems become urgent questions in projection optic research field. This paper’s research mainly focuses on three hot issues, which are:1. Portable projecting system’s self-perception of complex projecting environment geometry and its adaptive geometric correction of projection image;2. Self-perception of inherent texture and ambient light interference in projection environment,and adaptive color correction of projecting image;3.Self-perception of projection defocus and adaptive blur removal. Real-time projecting correction algorithms with high precision are proposed focusing on three aspects mentioned above and a set of wearable combat support system based on intelligent portable projecting system with self-perception of environment is designed and implemented.In summary, the author believes that the main contributions of this paper are:1.A discrete pixel mapping set based projection geometric correction algorithm is studied and this algorithm effectively solved the problem of projection image correction in complex geometric projection environment. The core correction process is an independent projection geometric self-correction system needs no manual adjustment which not only simplifies the installation and adjustment process but also not restricted by space and time. This algorithm achieves "arbitrary placement and projection everywhere".2. A optimized Lambertian reflection model based projecting image color correction algorithm is studied and this algorithm enables projector achieves intelligent geometric correction and color complementation in planar and non-planar environment which eliminates color deviation and light scattering phenomenon of projection image caused by various complex geometric surface and inherent irregular texture in daily living environments, so that the users could get rid of dependence on professional projector screen and take arbitrary scenes of life as the "white projection screen".3. A multi-scale convolution kernel template based projection blur elimination algorithm is studied. The projection blur eliminating system can render and output blur eliminated projection image with much higher precision and calculating efficiency comparing with previous methods. This technology could be used on real-time representation with projector and effectively enhances resolution and recognition of details of projection images which eventually achieved blur elimination of projection images.4. Based on the above technology, a portable intelligent projection system based wearable combat support system is studied and implemented. Experiments have been carried out to prove its efficiency. This study provides a new visual technology and equipment for interactive experience and application of augmented reality under life scenarios and nowadays war field.