Image processing device for controlling the transfer function of an optical system
First Claim
1. An image processing device of scene light from an object, comprising an image sensor and a flat image transfer screen both arranged to receive scene light from the same object, an image receiving surface placed optically downstream of the flat transfer screen, said image sensor comprising a first network of image points or pixels, said image sensor being adapted to generate for each of the pixels of the first network a signal representative of an optical parameter of the scene light, said first network being connected to a processing means and for delivering thereto said representative signals, said flat screen comprising a second network of image point or pixels, said processing means generating state control signals as a function of said representative signals, memory means connected to said processing means for storing the state control signals generated by said processing means, said processing means also being connected to said second network for transferring said state control signals from said memory to corresponding ones of said pixels of said second flat screen, and said flat screen defining means for modulating the scene light for optical transfer to said receiving surface.
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Abstract
An image processing device having at least an image sensor, a flat image transfer screen and a computer, characterized by a sensor (3) arranged as a first network of image points or pixels, an analysis device (6, 4) adapted to generate for each pixel of the sensor a signal representative of at least one parameter, and at least a flat screen (18, 20, 25) organized according to a network of image points or pixels in association with processing means (5, 9) intended to elaborate for each pixel of the screen a state control signal which is a function of the representative signals delivered by the analysis means, the sensor and the screen receiving images of same objects, these images being transmitted or reflected by the screen. The device is more particularly suited to be used in the photographic industry.
153 Citations
24 Claims
- 1. An image processing device of scene light from an object, comprising an image sensor and a flat image transfer screen both arranged to receive scene light from the same object, an image receiving surface placed optically downstream of the flat transfer screen, said image sensor comprising a first network of image points or pixels, said image sensor being adapted to generate for each of the pixels of the first network a signal representative of an optical parameter of the scene light, said first network being connected to a processing means and for delivering thereto said representative signals, said flat screen comprising a second network of image point or pixels, said processing means generating state control signals as a function of said representative signals, memory means connected to said processing means for storing the state control signals generated by said processing means, said processing means also being connected to said second network for transferring said state control signals from said memory to corresponding ones of said pixels of said second flat screen, and said flat screen defining means for modulating the scene light for optical transfer to said receiving surface.
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24. An image processing device of scene light from an object, comprising an image sensor and a flat image transfer screen both arranged to receive scene light from the same object, an image receiving surface placed optically downstream of the flat transfer screen, said image sensor comprising a first network of image points for pixels, said image sensor being adapted to generate for each of the pixels of the first network a signal representative of an optical parameter of the scene light, said first network being connected to a processing means and for delivering thereto said representative signals, said flat screen comprising a second network of image points or pixels, said processing means generating state control signals as a function of said representative signals, memory means connected to said processing means for storing the state control signals generated by said processing means, said processing means also being connected to said second network for transferring said state control signals from said memory to corresponding ones of said pixels of said second flat screen, and said flat screen modulating the scene light transferred thereby, for optical transfer on said receiving surface, said flat screen and said receiving surface both being located proximate to a focusing plane of said device, each of said pixels of said second network optically corresponding to at least one of the pixels said first network and receiving light form the same part of the object as the at least one pixel of said first network, the state control signal for each of the pixels of the second network being a function of the representative signal of the at least one pixel of said first network, the optical parameter being light intensity, the state control signal being a decreasing function of the representative signal of the at least one pixel of the first network and the resulting modulated light having a lower contrast than the scene light of the object.
Specification