Detection device, display device and detection method

A detection device, comprising:

• an area image sensor configured to capture an image of a subject by using a rolling method in which an image is acquired sequentially from a first block to an n-th block on a block-by-block basis, each block including one or more lines, the n being an integer equal to or greater than 2;
• a first displacement acquisition unit configured to compare an image of an m-th block included in a first frame captured by the area image sensor with an image captured in the m-th block included in a second frame captured after the first frame to acquire displacement of the image with respect to a main scanning direction of the line, the m being a positive integer equal to or less than the n;
• a second displacement acquisition unit configured to compare an image of a p-th block included in the first frame with an image captured in the p-th block included in the second frame to acquire displacement of the image with respect to the main scanning direction, the p being a positive integer equal to or less than the n and the m≠the p;
• and
• a difference acquisition unit configured to acquire, as a value corresponding to acceleration of the area image sensor with respect to the subject, difference between the displacement acquired in the m-th block and the displacement acquired in the p-th block.