{
  "$type": "site.standard.document",
  "description": "The imaging unit captures an image using a lens having an effective image circle smaller than the imaging surface of an image sensor. A vignetting amount calculation unit of a detection unit individually calculates, for four corners, a region size of a vignetting region generated in the captured…",
  "path": "/patents/1325869",
  "publishedAt": "2022-09-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R1/00",
    "Sony Semiconductor Solutions Corporation"
  ],
  "textContent": "The imaging unit captures an image using a lens having an effective image circle smaller than the imaging surface of an image sensor. A vignetting amount calculation unit of a detection unit individually calculates, for four corners, a region size of a vignetting region generated in the captured image acquired by the imaging unit , for example. A determination unit detects a change in the region size calculated at the time of focus abnormality detection processing with respect to the region size calculated at the reference time, and determines that a focus abnormality is detected when the change in the region size exceeds a threshold at any of the four corners. This enables accurate detection of focus abnormality.",
  "title": "ABNORMALITY DETECTION DEVICE, ABNORMALITY DETECTION METHOD, PROGRAM, AND INFORMATION PROCESSING SYSTEM"
}