The integration of mobile technology into healthcare has evolved into an important research area called mHealth. Current mobile imaging applications enhance communication between different healthcare providers, enhance direct interaction between providers and patients, and allow medical images to be referenced from almost any location. This book presents state-of-the-art research in electronic imaging technologies and their applications to mobile healthcare. Twelve chapters by leaders in their fields are divided into four parts: Part I on image processing and enhanced visualization; Part II on security issues in mobile healthcare applications; Part III on human external pulsometers and activity recognition; and Part IV on mobile healthcare applications, including skin cancer monitoring with an iPhone using image retrieval techniques, a mobile healthcare interface, and an automatic multiview food classification method for food intake assessment on a smart phone. The editors hope that this book will inspire further research in mHealth.