PROBLEM TO BE SOLVED: To provide a target detection apparatus for determining a candidate of a defective pixel in which a target is present if the target within a captured image is a micro target of about one pixel and the target is present at a position of the defective pixel.SOLUTION: The target detection apparatus comprises: imaging means for imaging a predetermined region by using an imaging element for which a position of the defective pixel is known in advance; calculation means by which, on the basis of a plurality of first pixel groups neighboring from the captured image to the defective pixel and a plurality of second pixel groups neighboring to a side of the first pixel groups opposite to the defective pixel, a vector of a luminance value from the second pixel group to the first pixel group is calculated; and determination means by which, on the basis of the vector of the luminance value calculated by the calculation means, a luminance value of the defective pixel is estimated and on the basis of the estimated luminance value, the defective pixel is determined as a pixel of a candidate in which the target is present.SELECTED DRAWING: Figure 1
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