IPTC is a directory system established in 1970 to manage image information. Before the emergence of IPTC, Images cannot be classified, and we cannot obtain image-related information from the image itself.
For example, if I go to Huangshan to play now, I have taken several classic photos and published them online. If I do not add any remarks when I publish them. When you see this image, you can see who shot it.
When did you take it? And even if I write it clearly, someone will download the image. Then upload the image to another website. The remarks may also disappear. We cannot know from the image itself
The information behind the image. This protocol can combine image data with text data to generate an image containing text information. Of course, the text information is not straight
Connected to the image. You can view this information through photoshop or some other image software.