IMAGING APPARATUS
First Claim
1. An imaging apparatus including an infrared video camera comprising a sensor array and operable to produce successive video images in the form of pixelated two-dimensional images, the imaging apparatus further comprising a processing arrangement operable to reduce or increase an overall brightness of an enhanced image in dependence upon an overall brightness of a pre-enhanced image and an overall brightness of a preceding enhanced image, so that a change in the overall brightness between the enhanced image and the preceding enhanced image is decreased to be less than a difference in overall brightness between the pre-enhanced image and the preceding enhanced image.
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Accused Products
Abstract
An imaging apparatus including an infrared video camera. The infrared video camera includes a sensor array operable to produce successive video images in the form of pixelated two-dimensional images. The imaging apparatus further comprises a processing arrangement operable to reduce or increase the overall brightness of an image in dependence upon the overall brightness of the pre-enhanced image and the overall brightness of the preceding enhanced image, so that the change in the overall brightness (DC-level) between the enhanced image and the preceding enhanced image is decreased.
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Citations
9 Claims
- 1. An imaging apparatus including an infrared video camera comprising a sensor array and operable to produce successive video images in the form of pixelated two-dimensional images, the imaging apparatus further comprising a processing arrangement operable to reduce or increase an overall brightness of an enhanced image in dependence upon an overall brightness of a pre-enhanced image and an overall brightness of a preceding enhanced image, so that a change in the overall brightness between the enhanced image and the preceding enhanced image is decreased to be less than a difference in overall brightness between the pre-enhanced image and the preceding enhanced image.
- 4. An image enhancement method applicable to infrared video images characterised in that, for each video image, an overall brightness of an enhanced image is reduced or increased in dependence upon an overall brightness of a pre-enhanced image and an overall brightness of the preceding enhanced image.
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5. An image enhancement method applicable to infrared video images in which at least a fraction of an overall brightness of successive images from an infrared video camera is low-pass filtered with respect to time.
Specification