Figure 2
From: Realistic camera noise modeling with application to improved HDR synthesis
Camera response function and irradiance probability density function. (a) Illustration of a CRF recovered from three LDR images taken with different exposure times. As indicated by the colors, each LDR image covers a different region of the dynamic range, (b) exponential probability density function f E (E), fitted to the irradiance histograms of three HDR images.