Image analysis device, image analysis method, and pulse wave detection device

Provided is an image analysis device capable of obtaining a pulse wave having good signal quality. The time change detection unit (12) directly outputs the time-series data of the pixel values of the green pixels as it is. The time change detection unit (12) further applies a noise reduction filter (21) and a noise reduction filter (22) individually to at least one of the time-series data of the pixel values of the red pixels and the time-series data of the pixel values of the blue pixels, thereby outputting noise-reduced time-series data. 提供一种能够得到信号质量良好的脉波的影像解析装置。时间变化检测部(12)将绿色像素的像素值的时间序列数据原样直接输出。时间变化检测部(12)进一步对红色像素的像素值的时间序列数据以及蓝色像素的像素值的时间序列数据中的至少任一个单独应用噪声降低滤波器(21)以及噪声降低滤波器(22)，由此输出降低了噪声的时间序列数据。