JEITA  CP-3451 - 39 - FlashEnergy Indicates  the  strobe  energy  at  the  time  the  image  is  captured,  as  measured  in  Beam  Candle  Power  Seconds (BCPS). Tag =    41483 (A20B.H) Type =    RATIONAL Count =    1 Default =    none SpatialFrequencyResponse This tag records the camera or input device spatial frequency table and SFR values in the direction of image width, image height, and diagonal direction, as specified in ISO 12233. Tag = 41484 (A20CH) Type = UNDEFINED Count = ANY Default = none When the spatial frequency response for m rows and n columns is recorded, the values are as shown in Figure 14. Length Type Meaning 2 SHORT Columns = n 2 SHORT Rows = m Any ASCII 0th column item name (NULL terminated) : : : Any ASCII n-1th column item name (NULL terminated) 8 RATIONAL SFR value [0,0] : : : 8 RATIONAL SFR value [n-1,0] 8 RATIONAL SFR value [0,m-1] : : : 8 RATIONAL SFR value [n-1,m-1] Figure 14 Spatial Frequency Response Description Table 10 gives a simple example. Table 10 Example of Spatial Frequency Response Spatial Frequency (lw/ph) Along Image Width Along Image Height 0.1 1.00 1.00 0.2 0.90 0.95 0.3 0.80 0.85 FocalPlaneXResolution Indicates the number of pixels in the image width (X) direction per FocalPlaneResolutionUnit on the camera focal plane. Tag = 41486 (A20E.H) Type = RATIONAL Count = 1 Default = none FocalPlaneYResolution Indicates the number of pixels in the image height (Y) direction per FocalPlaneResolutionUnit on the camera focal plane.