METHOD OF GENERATING DIGITAL MULTISPECTRAL TELEVISION SIGNALS Russian patent published in 2020 - IPC H04N7/18 

FIELD: multispectral television.

SUBSTANCE: invention relates to the field of multispectral television, using the registration of the reflected or radiated flux in several areas of the optical spectrum. Optical separation is carried out from the light flux in general λ₁÷λ_max spectral interval n of multispectral light fluxes in wavelength intervals λ₁÷λ_max, λ₂÷λ_max, …, λ_n÷λ_max, where λ₁<λ₂ … <λ_n<λ_max, generating electric signals proportional to light brightness in elements of multispectral images, converting them into corresponding digital codes U₁, U₂…U_n and calculate the digital codes U_{out 1}=f(U₁;U₂;U_max), U_{out 2}=f(U₂;U₃;U_max), …, U_{out n-1}=f(U_n-1;U_n;U_max), where U_max – maximum possible value of digital codes U₁, U₂…U_n. Codes of digital multispectral television signals corresponding to narrow detection zones λ₁÷λ₂, λ₂÷λ₃, … λ_n-1÷λ_n, is calculated by formulas U¹₁=[U₂×(U_max-U₁)], U¹₂=[U₃×(U_max-U₂)], U¹_n-1=[U_n×(U_max-U_n-1)] or by formulas U¹₁=[U₁×(U_max-U₂)], U¹₂=[U₂×(U_max-U₃)], U¹_n-1=[U_n-1×(U_max-U_n)], determining maximum values U¹_1max, U¹_2max, … U¹_n-1max of corresponding calculated digital codes U¹₁, U¹₂, … U¹_n-1, and output values of codes of digital multispectral television signals, corresponding to narrow detection zones λ₁÷λ₂, λ₂÷λ₃, … λ_n-1÷λ_n, are formed in accordance with the expressions U_out1=U¹₁×(U_max/U¹_1max), U_out2=U¹₂×(U_max/U¹_2max), thus, high contrast of digital multispectral television signals is achieved due to multiplication of digital codes and their subsequent normalization.

EFFECT: technical result consists in improvement of contrast of digital multispectral television signals.

1 cl, 5 dwg