A display apparatus and method are provided for identifying a biometric signal of a user while content is displayed. The display apparatus includes a camera, a display, a memory, and at least one processor. While content is output through the display, the processor obtains an image through the camera in response to an occurrence of a preset event. The processor determines whether to perform filtering on the obtained image based on a plurality of first pixel values corresponding to a facial area of a user identified in the obtained image and a plurality of second pixel values corresponding to the content displayed through the display. When filtering is determined to be performed, the processor generates a corrected image by filtering the obtained image based on the plurality of second pixel values. The processor then identifies a biometric signal of the user based on the corrected image.