The Scientist & Engineer's Guide to Digital Signal Processing

这是一本把「数学」从数字信号处理里尽量请出去的书。作者面对的是物理、地质、海洋、生物医学等各领域中被 FFT、卷积、滤波器这些概念劝退的实际工作者——他们不需要推导证明，需要的是「这东西到底在干什么」。全书以直观解释代替公式证明，把复数留到理解基本原理之后再接触，再用极简程序让概念落地。读者反馈中最强烈的两点是：有人读完才真正搞懂傅里叶变换，甚至想把自己整门课换成 DSP；也有人直言它「写给人的书，而不是写给数学动物」。正因如此，它既是自学入门的首选，也存在「有些章节精彩、有些平平」的分歧。它适合那些愿意先建立直觉、再回头补数学的人，而不适合追求严格推导的读者。

Steve Smith specializes in developing novel imaging systems for medicine, security, and industrial applications. Two of his major projects have been the SECURE 1000 and SentryScope. The SECURE 1000 is a security system for detecting weapons, explosives, and drugs hidden under the clothing of criminals and terrorists. More than 150 of these $100,000 systems are in use in the U.S. and overseas. SentryScope is an ultra-high resolution surveillence camera, producing images with more than 20 million pixels. The first SentryScope cameras were sold in September 2003. In the medical field, Dr. Smith has developed x-ray systems for detecting blocked arteries in the heart (arteriosclerosis), and the loss of calcium in the bones (osteoporosis). His work in nondestructive testing has led to products for inspecting cans and bottles for fill level and leaks, and printed circuit boards for defective solder connections. Dr. Smith is the author of The Scientist and Engineer's Guide to Digital Signal Processing, the number one selling DSP book on Amazon.com (out of 700+ titles). Unlike most of the DSP literature, this book provides clear explanations of practical DSP techniques without getting lost in detailed math and theory. Dr. Smith is also the author of The Inner Light Theory of Consciousness, a novel approach to explaining the nature of the human mind. At present, Dr. Smith is president and technical director of Spectrum San Diego, Inc., a research and development group specializing in imaging and instrumentation systems. He lives in San Diego with his wife, Jenny.