Method for reconstructing high-dynamic-range imaged flame three-dimensional temperature field
A high dynamic range, three-dimensional temperature technology, applied in the field of virtual reality science, can solve the problems of complex acquisition equipment, difficult to obtain flame images, and excessive simplification of imaging models, so as to simplify the acquisition equipment and improve the calculation accuracy.
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[0025] The present invention will be further described below in conjunction with the drawings.
[0026] Step 1 Design the flame collection system. Place the high dynamic imaging range camera around the combustion source. All cameras form a semicircular shape; the distance from each camera to the flame is equal, all cameras are placed at the same height, and the angle between the cameras is fixed , The specific value is related to the number of cameras during acquisition.
[0027] Step 2 The camera response curve defines the relationship between image brightness and irradiance. The calibration is achieved by multiple exposures of the same scene, assuming that the value of the i-th pixel in the j-th image is p ij , Its exposure time is Δt j , The irradiance corresponding to the pixel value is E i , The relationship between the three can be described as:
[0028] g(p ij )=ln E i +lnΔt j
[0029] The exposure time and pixel gray value are known, and the unknown variables are the functio...
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