Blinder David
Opt Express. 2019 Aug 5;27(16):23124-23137. doi: 10.1364/OE.27.023124.
Computer-generated holography is computationally intensive, making it especially challenging for holographic displays where high-resolutions and video rates are needed. To this end, we propose a technique for directly calculating short-time Fourier transform coefficients without the need for a look-up table. Because point spread functions are sparse in this transform domain, only a small fraction of the coefficients need to be updated, enabling significant speed gains. Twenty-fold accelerations are reported over the reference implementation. This approach generalizes the notion of the phase-added stereogram, allowing for the calculatiion of an arbitrary number of Fourier coefficients per block, enabling high calculation speed with holograms of good visual quality, targeting minimal memory requirements.
计算机生成全息术计算量很大，这使得它对于需要高分辨率和视频速率的全息显示来说尤其具有挑战性。为此，我们提出了一种无需查找表即可直接计算短时傅里叶变换系数的技术。由于点扩散函数在该变换域中是稀疏的，因此只需要更新一小部分系数，从而能够显著提高速度。与参考实现相比，报告的加速比为二十倍。这种方法推广了相加相移立体图的概念，允许每个块计算任意数量的傅里叶系数，以最小的内存需求实现具有良好视觉质量的全息图的高计算速度。
