METHOD OF GENERATING TELEVISION IMAGE SIGNALS OF DIFFERENT SPECTRAL REGIONS Russian patent published in 2015 - IPC H04N7/18 

FIELD: physics.

SUBSTANCE: method is carried out by generating television image signals of different spectral regions, which includes detecting an input radiation flux F'(λ) within a wide spectral interval from λ₁ to λ_n; generating therefrom three separate radiation fluxes F₁(λ), F₂(λ) and F₃(λ); generating in a first channel of radiation flux F₁(λ) in the visible spectral region colour television video signals U_R(t), U_G(t) and U_B(t); generating in a second channel of radiation flux F₂(λ) in the visible and near-infrared spectral region spectrozonal television video signals U_Δλ1(t), U_Δλ2(t) and U_Δλ3(t); generating in a third channel, based on the radiation flux F₃(λ) in the thermal infrared spectral region, thermal imaging video signals U_Δλ4(t) and U_Δλ5(t). Before generating image signals, in the first channel, the radiation flux F₁(λ) is further split into three identical fluxes; in the second channel, the radiation flux F₂(λ) is further split into three identical fluxes; and in the third channel, the radiation flux F₃(λ) is further split into two identical fluxes; each separate flux is then passed through a separate optical filter. The spectral characteristic of the optical filter for the first channel corresponds to detection zones of light flux in the red (R), green (G) and blue (B) regions of the visible spectral region; for the second channel, the spectral characteristic of the optical filter corresponds to selected detection zones Δλ₁, Δλ₂ and Δλ₃ of radiation flux in the visible and near-infrared spectral regions and for the third channel corresponds to detection zones Δλ₄ and Δλ₅ in the thermal infrared spectral region. Further, the method includes separate conversion of each radiation flux into an image signal, after which the obtained groups of video signals for the first, second and third channels are amplified, followed by conversion of analogue video signals to digital, digital aperture processing of the video signals and gamma correction of the video signals and using the colour television U_R(t), U_G(t) and U_B(t), spectrozonal television U_Δλ1(t), U_Δλ2(t) and U_Δλ3(t) and thermal imaging U_Δλ4(t) and U_Δλ5(t) digital video signals for combined processing thereof. The method further includes an operation for subtraction or summation of video signals with each other, replacing part of the image of one video signal with part of the image of another, changing the polarity of video signals, dividing the video signals into low-frequency and high-frequency components, followed by displaying original and newly generated video signals on video monitor screens for visual perception of images and automatic analysis.

EFFECT: high resolution of television images and enabling real-time change of detection zones of radiation flux for viewing objects in different spectral regions of the optical spectrum.

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