I am looking into potential design folows for a new project, and am looking at using the Computer Vision Toolbox to create a design that I can then bring into Intel's Quartus FPGA development environment using the DSP Builder software. Is this a valid toolchain?
Did you mean to ask about Vision HDL Toolbox and not Computer Vision Toolbox? In that case, the HDL code you generate from Vision HDL Toolbox and HDL Coder can be brought into Quartus directly. There is no need for DSP Builder in this workflow unless you want to import the HDL into that product.