Image processing apparatus that generates a tomographic image of a subject based on phase-adjusted measurement signals from which a background signal is subtracted, and related imaging apparatus, image processing method, and computer readable storage medium

Abstract

An image processing apparatus includes a memory that stores instructions, and at least one processor that executes the instructions to acquire measurement signals including information on a tomography of a subject in a depth direction obtained by performing optical coherence tomography on the subject, to acquire a base signal based on the measurement signals, and to calculate phase shifts between the measurement signals and the base signal. The processor further executes the instructions to smooth the phase shifts, to adjust phases of the measurement signals corresponding to the smoothed phase shifts based on the smoothed phase shifts, and to generate a background signal corresponding to a noise component based on the phase-adjusted measurement signals. In addition, the processor subtracts the background signal from the phase-adjusted measurement signals, and generates a tomographic image of the subject based on the phase-adjusted measurement signals from which the background signal is subtracted.