JEOL JSPM-5200 Instructions Manual page 493

■ TIFF image data structure
The actual image data is stored in the TIFF image data structure. The amount of data per
pixel is 8 bits (1 byte). For instance, the size of a 512×512 pixel image is 512 pixels×
512 pixels×1 byte= 262,144 bytes.
■ Color map data structure
The LUT color data is recorded in the Color Map structure as 256 level data for each
color (RGB). The amount of data per level is 16 bits (2 bytes) and, therefore, Color Map
= 256 (levels)×2 bytes×3 (colors—RGB) = 1,536 bytes.
■ Overall file size
The size of the topographic image file is given by Header (10 bytes) + Image Header
(6,090 bytes) + Directory (1,024 bytes)
+ Image Data (262,144 bytes) + Color Map (1536 bytes) = 270,804 bytes.
TMPM5200-2
７ APPENDIX
7-45