The OpenVX standard has appeared as an answer from the computer vision community to the challenge of accelerating vision applications on embedded heterogeneous platforms. It is designed to leverage the computer vision hardware potential with functional and performance portability. As long as VIPE has a powerful model of computation, it can incorporate various other models. This allows to extend facilities of a language or framework that is based on the model to be incorporated with visual programming support and provide access to the existing performance analysis and deployment tools. The authors present OpenVX integration into the VIPE IDE. VIPE addresses the need to design OpenVX graphs in a natural visual form with automatic generation of a full-fledged program, shielding a programmer from writing a bunch of boilerplate code. To the best of the authors' knowledge, this is the first use of a graphical notation for OpenVX programming. Using VIPE to develop OpenVX programs also enables the performance analysis tools.
The chapter considers VIPE development environment with the main emphasis on its formal ground. The detailed description of a formal VIPE model of computation (MoC) and the semantics of language constructs let the reader reason about the behavior of the constructs in question. The authors propose a rigorous description of program transformations applied to the program while it is compiled. The program after all the transformations is a correct one from the view of the host MoC. Its behavior meets the programmer's expectations even when it includes fragments, which belong to a guest MoC. Techniques for translation of the guest MoC (OpenVX) constructs into the host MoC (VIPE) constructs were proposed. The approach described here leads to the end program that is fully conformant to the host MoC. In addition, the whole toolset is at the programmer's disposal, namely visual editor, compiler, runtime, and analysis tools. They stay applicable to the program, some parts of which are now guest MoC constructs.
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