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Basic 3D graphics processor implemented on small FPGA

Panek K., Flak B., Koryciak S., Wiatr K.

Measurement Automation Monitoring

2018

Vol. 64, No. 1

8--10

FPGAs have big computing possibilities and therefore are very popular as dedicated hardware accelerators. A few years ago, FPGAs were expensive and the cheapest ones had very limited capabilities, because of small amount of logic elements and slow internal clocks. Nowadays, cheap development boards are available at a price below 50€ with abilities to transmit even HDMI signals. This paper covers implementation of the soft processor with a 3D graphics coprocessor on the cheapest available FPGA board with HDMI connector, containing only 8k Logic Elements.

A perspective shape-from-shading metod using fast sweeping numerical scheme

Yang L., Han J.

Optica Applicata

2008

Vol. 38, nr 2

387-398

Shape-from-shading (SFS) is an approach of 3-D shape reconstruction from only one image. A new perspective SFS method is proposed in this paper. Firstly, a reflectance map equation under perspective projection is introduced. Then, the reflectance map equation turns into a static Hamilton-Jacobi equation. So the SFS problem is formulated as a viscosity solution of the static Hamilton-Jacobi equation. The fast sweeping numerical method is used to solve the Hamilton-Jacobi equation and a new SFS method is gained. At last, experiments on both synthetic and real images are given. Experiments on the synthetic image show that the proposed SFS method is fast and accurate. Results of the real image show the efficiency of the proposed method when dealing with complicated real surface, and new criteria to evaluate the performance of the method are proposed.