If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#9
|
|||
|
|||
Going back to film...
wrote in message ... Alan Browne wrote: A major attraction of digital is that you can shoot a lot more, with no cost, loss or penalty and of course convenience. This is one of the reasons for me to stop shooting digital. On the analog issue, when you shoot film and optically print it in the darkroom, that's pretty much an analog process don't ya think? There isn't much analog about a digital camera other than the light hitting the sensor. After that point, it's all digital. The image is converted to digital data before it ever leaves the sensor. Stephanie Digital properly refers to a method of storage and transmission that samples the original continuous data in a discontinuous way and further codes it into numbers. There are discontinuous methods that are not digital such as pulse coding. These can have some of the advantages of digital in that they are immune from non-linearities in the storage and transmission system. For instance, pulse coding can be adapted to magnetic recording. Digital goes another step from simply sampling the data, it codes it into numbers following some set plan so that the original data can be exactly reconstructed. In practice, because of limitations of bandwidth in both transmission and storage media digital data is often compressed. Some compression methods loose some of the original information and some don't. The common JPEG compression scheme used for digital images on the internet is a "lossy" compression method. It assumes certain statistical characteristics of the original in order to reconstruct an approximation of it. A low compression JPEG can be nearly as good as the original but, if its decoded and recoded some additional information is lost so it can go only a limited number of generations. By this I mean generations where decoding and recoding are required such as editing. Other compression schemes are do not have data loss and can be reapplied essentially without limit. The main advantages of "digital" photography is that it is electronic and would have many of the same advantages even if digital encoding were not used. However, properly applied, digital encoding and decoding can eliminate many problems with imperfect transmission and storage methods. -- Richard Knoppow Los Angeles, CA, USA |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
HELP PLEASE - APS REWIND BACK TO ZERO WITH NEW FILM | Fred McKenzie | APS Photographic Equipment | 3 | September 4th 04 09:56 PM |
6X8 ROLL FILM BACK FOR 4X5 | Massimiliano Spoto | Fine Art, Framing and Display | 0 | May 20th 04 05:55 AM |