8 Oct 2007

Digital technology - Exif file

I came up with this new technology in Digital photography when i was uploading images on Flickr. I was really amazed and impressed at the same time when i discovered that each image i clicked using my digital camera had all the details along with it like name of camera it was taken with,its shutter speed,exposure,focal length, ISO speed and what not. I was really really impressed. For an example please refer this link Acads building (Exif)


Camera: Sony DSC-H3
Exposure: 0.008 sec (1/125)
Aperture: f/4
Focal Length: 25.7 mm
ISO Speed: 160
Exposure Bias: 0/10 EV
Flash: Flash did not fire, auto mode

Orientation: Horizontal (normal)
X-Resolution: 72 dpi
Y-Resolution: 72 dpi
Date and Time: 2007:10:07 15:25:42
YCbCr Positioning: Co-Sited
Exposure Program: Normal
Date and Time (Original): 2007:10:07 15:25:42
Date and Time (Digitized): 2007:10:07 15:25:42
Compressed Bits per Pixel: 3 bits
Maximum Lens Aperture: 58/16
Metering Mode: Pattern
Color Space: sRGB
Compression: JPEG
Tag::Sony::0xB020: Standard
Tag::Sony::0xB041: 6
Tag::Sony::0xB042: 2
Tag::Sony::0xB044: 1
Tag::Sony::0xB04B: 2
Tag::Sony::0xB04C: 10/10
Tag::Sony::0xA000: 2147483653
Tag::Sony::0xA001: 19
Image Width: 3264 pixels
Image Height: 2448 pixels

Exchangeable image file format (Exif, not EXIF) is a specification for image file format used by digital cameras. The specification uses the existing JPEG,TIFF Rev. 6.0, and RIFF WAVE file formats, with the addition of specific metadata tags. I had downloaded the Exif viewer which shows the camera specifications when you see the properties of the image. Its cool,you should try it out too.

For more details please refer Wikipedia

Cheers to Exif technology and hats off to those who made it possible.


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