1. A processor implemented liveness test method, the liveness test method comprising: extracting an interest region of an object from a portion of the object in an input image; performing a liveness test on the object using a neural network model-based liveness test model for each of one or more images of the object respectively input to the liveness test model, wherein image information of the interest region is provided, as first input image information, to a first input layer of the liveness test model, wherein image information of the input image or image information of the portion of the object is provided, as second input image information, to a second input layer of the liveness test model, and wherein the performing of the liveness test further includes determining, by the liveness test model, liveness of the object based at least on extracted texture information from the first input image information by the liveness test model and information extracted from the second input image information by the liveness test model; and indicating a result of the liveness test.