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.