| CPC G06T 7/194 (2017.01) [G06T 5/003 (2013.01); G06T 7/536 (2017.01); G06T 7/55 (2017.01); G06T 2207/10024 (2013.01)] | 19 Claims |
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15. An image processing device comprising:
a background image generator; and
an image corrector,
wherein the background image generator
determines a middle image located at a middle when first thermal images of multiple frames obtained by imaging by a thermal image sensor in a same field of view or sorted images of multiple frames generated from the first thermal images are ranked in order of brightness,
calculates a feature quantity serving as an indicator of brightness for each of the first thermal images or the sorted images,
generates an average image by averaging, in a frame direction, first thermal images or sorted images of multiple frames of the first thermal images or the sorted images satisfying a condition that a difference in the feature quantity between the first thermal image or the sorted image and the middle image is smaller than a predetermined difference threshold, and
stores, in a storage device, a sharpened image obtained by sharpening the average image, and
wherein the image corrector generates a corrected thermal image by correcting a second thermal image obtained by imaging by the thermal image sensor in a same field of view as the first thermal images, by using a skeleton image obtained by extracting a skeleton component from the sharpened image stored in the storage device.
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