Image quality rating system
阅读：957发布：2023-07-11
专利汇可以提供Image quality rating system专利检索，专利查询，专利分析的服务。并且The sharpness of definition of an image on film may be automatically determined by comparing an original image on film with a perturbation of the same image formed from the original image. Such perturbation is achieved by using a hologram deblurring filter upon which the original image is projected. A photodetector is used to measure the power spectral density first of the original image, then of the deblurred image. As one criterion of the evaluation, the readings from the photodetector are compared and if the original image has a lower amount of high frequency content that the deblurred image then the original image is not a sharp image. If the original image has a substantially larger amount of high frequency content that the deblurred image then the original image is a sharp image.，下面是Image quality rating system专利的具体信息内容。
1. A system for automatically determining the quality of a light image comprising, a first lens means to which said light image is applied for establishing a diffraction pattern of said light image at the filter plane, photo-conductive detector means for establishing a pattern of voltages representative of the spectral energy distribution in the light diffraction pattern applied thereto, a second lens means for applying the diffraction pattern produced by said first lens means to said photoconductive detector means, a plurality of deblurring filters, means for successively placing each of said plurality of deblurring filters at the focal plane of said first lens means for deblurring the light image which has passed through said first said lens means, computer means including, means for successively storing the voltage patterns produced by said photoconductive detector means in response to the successive light diffraction patterns applied thereto without a deblurring filter and with the successive interposition of each of the plurality of the deblurring filters, means for comparing the pattern of voltages stored without a deblurring filter with each of the patterns of voltages stored when a deblurring filter is used for determining whether or not the quality of the light image is improved by any of the deblurring filters and which one, and means responsive to the determination of said means for comparing to produce an indication thereof.
2. A system as recited in claim 1 wherein said light image is derived by illuminating an object with coherent light.
3. A system as recited in claim 1 wherein an object is illuminated by incoherent light, to provide an incoherent light image, and there is included, a nematic liquid crystal means positioned between said object and said first lens means for receiving said incoherent light image, a source of coherent light, means for directing light from said source at said nematic liquid crystal means to provide an incoherent light image and a coherent light image corresponding to said incoherent light image, and a filter for blocking light from said incoherent light image and passing light from said coherent light image, said filter being positioned before said photo-detector means.
4. A system as recited in claim 1 wherein means for comparing the pattern of voltage stored without a deblurring filter with each of the patterns of voltages stored when a deblurring filter is used for determining whether or not the quality of the light image is improved by any of the deblurring filters and which one includes means for comparing the amplitude of the set of voltages comprising the voltage pattern produced by the light image without a deblurring filter being used successively with the amplitudes of the sets of voltages comprising the respective voltage patterns produced by each of the light images produced by using each of the deblurring filters whereby the set of voltages having the largest amplitude and thereby the best quality image may be determined.
5. A method of automatically determining the quality of a coherent light image comprising the steps of generating a first pattern of voltages representative of the spectral energy distribution of said coherent light image, applying said coherent light image to a deblurring filter to produce a second coherent light image, generating a second pattern of voltages representative of the spectral energy distribution of said second coherent light image, comparing said first and second patterns of voltages to determine whether or not the quality of said coherent light image is improved by applying it to said deblurring filter.
6. A method for automatically determining the quality of a light image of an object comprising illuminating said object with incoherent light to establish an incoherent light image, converting said incoherent light image to a coherent light image, generating a first pattern of voltages representative of the spectral energy distribution of said coherent light image, applying said coherent light image to a deblurring filter to produce a second coherent light image, generating a second pattern of voltages representative of the spectral energy distribution of said second coherent light image, comparing said first and second pattern of voltages to determine whether or not the quality of said coherent light image is improved by applying it to said deblurring filter.
7. A system for converting the incoherent light image of an object into a coherent light image comprising, a nematic liquid crystal to which said incoherent light image is applied, a source of coherent light, means to apply light from said coherent light source to said nematic liquid crystal, filter means for passing coherent light and rejecting incoherent light, and means for applying light output from said nematic crystal to said filter means whereby the light output from said filter means comprises a coherent light image of said object.
8. A method of determining the quality of a coherent light image comprising the method of successively interposing different deblurring filters between said light image and a receiver whereby successive resultant images are received by said receiver, and evaluating said successive resultant light images received by said receiver to determine which one, if any, is enhanced by one of said deblurring filters.
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