JEITA  CP-3451  Explication - 141 - Explication Table 2 Examples of Processing to be Avoided by Readers Processing that goes against the intent of the recorded values Duplicate processing Contrast Softening   when   hard   contrast was intended Excessive   softening   when   soft contrast is recorded Saturation    Lowering  saturation  when  high saturation was intended Raising    saturation    excessively when high saturation is recorded Sharpness    Increasing sharpness when weak sharpness was intended Increasing  sharpness  excessively when strong sharpness is recorded 7.3.14    SubjectDistanceRange Tag Information Indicates the distance range to the subject. [Writer] This is the distance to the part of the scene determined by the writer to be the main subject. The means of measuring this and the precision are implementation dependent. The camera setting may be recorded. When the subject distance range cannot be determined, 0 (unknown) shall be recorded. When macro mode is set, 1 (macro) shall be recorded. Generally if the subject distance is 1 to 3 meters, 2 (close view) shall be recorded. If the subject is farther than close range, 3 (distant view) shall be recorded. [Reader] This information can be used as information for processing images shot with flash. It can also be used as additional information about the SceneCaptureType. 7.4    Application Software Guidelines These guidelines give examples of tag handling when Exif image files are edited in application software. The problem here is that when application software edits and saves an Exif file, in some cases the tag information is not recorded the way it should be. By developing applications to handle tags in accordance with these guidelines, program developers can ensure that Exif image files are treated suitably. 7.4.1    Tag handling by application software Tags contain important information about the image data in a file. When application software processes an image and saves it as a new Exif image file, it is important that this Exif tag information be recorded properly along with the image. When a large amount of tag information is to be re-recorded, it can be copied from the original Exif file. Some of the tags, however, should be updated to reflect the changes made by the application software. 7.4.2    Tag handling examples This section explains tag handling when the following representative processing is performed.   a)     Rotation