| 摘要 |
<p>PROBLEM TO BE SOLVED: To automatically generate a mask in a short time without reference to the skillfulness of an operator, to detect abnormality occurring to an outline part, and remove noise except at the outline part. SOLUTION: The plant abnormality detecting device 1 converts a monitor image from a television camera 11 into a digital image by an A/D conversion part 2 and finds the difference image based on a reference image stored in a memory 7 for reference image storage by a difference processing part 3. A mask generation part 6 performs nonlinear luminance conversion for plural difference images found by the difference generation part 3 when an image state decision part 5 decides that there is no abnormality, and stores them in a memory 9 for mask generation and also adds them together to generate a gradation mask. This gradation mask is stored in a memory 10 for mask storage. A mask processing part 4 removes noise components by using the gradation mask stored in the memory 10 for mask storage and stores the result in a difference image storage memory 8. An image state decision part 5 decides whether or not abnormality occurs to the difference image stored in the memory 8.</p> |
