- Thu Aug 28, 2008 7:51 am
#273
Because jpg,s can hold camera setting information.. and if your pictures are coming out too low quality, you need to change your compression settings.
This image holds Exif Data and was taken with an old camera.. More uptodate cameras hold even more Information on them..
Exif IFD0
* Image Description =
* Camera Make = SONY
* Camera Model = DSC-W1
* Picture Orientation = normal (1)
* X-Resolution = 72/1 = 72
* Y-Resolution = 72/1 = 72
* X/Y-Resolution Unit = inch (2)
* Last Modified Date/Time = 2008:08:28 07:51:13
* Y/Cb/Cr Positioning (Subsampling) = co-sited / datum point (2)
* Unknown tag: Tagnum = 0xc4a5 ===> data = 0x50,0x72,0x69,0x6e,0x74,0x49,0x4d,0x00,0x30,0x32,0x35,0x30,0x00,0x00,0x02,0x00,0x02,0x00,0x01,0x00,0x00,0x00,0x01,0x01,0x00,0x00,0x00,0x00
Exif Sub IFD
* Exposure Time (1 / Shutter Speed) = 10/10000 second = 1/1000 second = 0.001 second
* Lens F-Number/F-Stop = 28/10 = F2.8
* Exposure Program = manual control (1)
* ISO Speed Ratings = 100
* Exif Version = 0220
* Original Date/Time = 2008:08:28 07:51:13
* Digitization Date/Time = 2008:08:28 07:51:13
* Components Configuration = 0x01,0x02,0x03,0x00 / YCbCr
* Compressed Bits per Pixel = 8/1 = 8
* Exposure Bias (EV) = 0/10 = 0
* Max Aperture Value (APEX) = 48/16 = 3
Max Aperture = F2.83
* Metering Mode = pattern / multi-segment (5)
* Light Source / White Balance = unknown (0)
* Flash = Flash fired, compulsory flash mode, return light detected
* Focal Length = 79/10 mm = 7.9 mm
* Maker Note = 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* FlashPix Version = 0100
* Colour Space = sRGB (1)
* Image Width = 640 pixels
* Image Height = 480 pixels
* Image Source = digital still camera (DSC)
* Scene Type = directly photographed image
* Custom Rendered = normal process (0)
* Exposure Mode = manual exposure (1)
* White Balance = auto (0)
* Scene Capture Type = standard (0)
* Contrast = normal (0)
* Saturation = normal (0)
* Sharpness = normal (0)
Exif IFD1
* Compression = JPEG compression (6)
* Camera Make = SONY
* Camera Model = DSC-W1
* Picture Orientation = normal (1)
* X-Resolution = 72/1 = 72
* Y-Resolution = 72/1 = 72
* X/Y-Resolution Unit = inch (2)
* Last Modified Date/Time = 2008:08:28 07:51:13
And I know this looks like a lot of useless information, but there are some useful parts like
* Exposure Time (1 / Shutter Speed) = 10/10000 second = 1/1000 second = 0.001 second
* Lens F-Number/F-Stop = 28/10 = F2.8
* ISO Speed Ratings = 100
And Date/Time is always a very useful feature when dealing with large numbers of images, I am actually in the process of working on my own Photo Organisation Program that works with the Exif data and an xml database.
Last edited by WORMSS on Mon Jan 23, 2017 3:54 pm, edited 1 time in total.
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WORMSS