On the other hand, there is the XMP or E xtensible Metadata Platform standard, developed by Adobe, and now maintained by ISO. A schema defines the fields and the information that you store in these fields. Today, the IPTC standard exists of two schemas, IPTC Core and IPTC Extension. The International Press Telecommunications Council maintains the IPTC standard. This standard has many revisions, starting with the legacy IPTC-IIM. Where Capture One treats EXIF as read-only, IPTC, on the other hand, is fully writable in Capture One as in other programs that handle IPTC. IPTC is a definition of fields and the information they should contain. This is mostly referred to as IPTC metadata. The second type of metadata is what you add to the image. If you like to read more about the EXIF standard, just search or start reading the Wikipedia page. There are several tools on the market to change the EXIF data and time. This makes it difficult to merge them in the proper order. For example, you shot a series with two or more cameras and their internal clocks did not align. Sometimes, however, you like to change the EXIF. Note that Capture One handles EXIF as read-only and therefore can not change it. Examples of EXIF metadata are date and time, ISO, focal length, shutter speed and aperture, and model of the camera. The camera writes technical information into the image on capture. This type of metadata is a standard most manufacturers of digital cameras use to record information in the image file. You have metadata that the camera writes into the image file, known as EXIF, or Exchangeable Image File Format. However, I find it useful to provide you with at least the basic background information that helps you understand where all this is coming from. You can skip this section, as it is rather theoretical. Understanding the difference helps you to enjoy the benefits and prevent confusion.
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