Muddiest:
When working with meta databases does it matter how many entities or attributes you have? Does the database function better with less?
Collaborating on a project such as the digital image project is beneficial in a number of ways. First, preserving images of the Pittsburgh region in a metadata file not only benefits the organizations involved but allows the general public greater access to these pictures. Next, by forming a committee, the three organizations were able to accomplish more than an individual group might have in posting their pictures online. There were a number of lessons learned like, better communication amongst the group members. What one group discovered while readying the pictures for posting was share with the whole group, allowing more time to be spent in other ways. Another lesson was that it was helpful to have an understanding of each group’s purpose, mission and how it fits within the Pittsburgh region; this made it easier to identify categories and groupings for the pictures.
When you have large files such as the photographic collection mentioned above compression of the files is important, you want to have as much room as possible for future expansion. If I understand correctly, with photographs the lossy method would be used to compress the file. This method is used because some data would be lost in transition such as color, but it would be undetectable by the human eye. The other method, which is lossless, compresses a file when you don’t want to loss any data in transfer. An example of this would be saving a spreadsheet, where you wouldn’t want a figure to be altered in anyway.
2 comments:
I am curious about the effect on metadata too. But I'm inclined to say that having more attributes would assist in finding the information you are looking for. But then again it could cause you to end up with too many hits. Hopefully they will bring this up in class.
I think compression would also help to protect the project from those who try to copy the photos. While the image projected on the screen seems as good a quality as the master, if it were printed out, the reduced quality would be obvious.
i agree that the project to preserve images of Pittsburgh was very important, and the collaboration was essential to make this happen. I liked what you wrote about lossy data compression and photographs. It is easier to decompress these this way, and the changes are not usually evident to the human eye. I wonder though, if a picture is compressed and decmpressed numberous times using the lossy method, maybe it eventually looses some of its quality?
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