There is a program called metacam which can read the metadata produced by many cameras. It would be great if Gallery used it to give additional information about the pictures. In particular, the capture date and the exposure information.
An example output follows (verbose mode produces even more).
Image Creation Date: 2003:02:26 17:03:40
Make: Canon
Model: Canon PowerShot G3
X Resolution: 180 Pixels/Inch
Y Resolution: 180 Pixels/Inch
YCbCr Positioning: Center of Array
EXIF Fields --------------------------------
Image Capture Date: 2003:02:26 17:03:40
Image Digitized Date: 2003:02:26 17:03:40
Exposure Bias: 0 EV
Focal Length: 7.18mm
Exposure Time: 1/40 Sec.
Aperture: f4
Exif Image Width: 2272 pixels
Exif Image Height: 1704 pixels
Metering Mode: Multi-Segment
EXIF Version: 0220
FlashPix Version: 0100
Flash: Unknown (16)
Sensing Method: Single Chip Color Area Sensor
Compressed Bits Per Pixel: 3
Aperture Value: f4
Max Aperture Value: f2
Focal Plane X Resolution: 56800/7 Pixels/Inch
Focal Plane Y Resolution: 56800/7 Pixels/Inch
Shutter Speed Value: 1/39.7394 Sec.
Manufacturer Fields ------------------------
Macro Mode: Macro
Flash Mode: No Flash
Drive Mode: Normal
Focus Mode: Continuous
Image Size: Large
Contrast: Normal
Saturation: Normal
Sharpness: Normal
ISO Speed: 400
Metering Mode: Evaluative
Exposure Mode: Manual
Focal Length: 7.1875-28.8125mm
White Balance: Tungsten
Flash Exposure Bias: 0 EV
Image Number: 101-0105
Image Type: IMG:PowerShot G3 JPEG
Firmware Version: Firmware Version 1.00
Owner Name:
PS
I just got Gallery installed. It's great.
Posted: Tue, 2003-03-25 04:01
Posts: 1301
Hi there
Gallery uses jhead for extracting exif info.
You can find more information on it here: <!-- BBCode Start --><A HREF="http://www.sentex.net/~mwandel/jhead/" TARGET="_blank">jhead info</A><!-- BBCode End -->
Gaile
Posts: 8
I installed jhead but I don't get that much information, either from the command line or from Gallery. Gallery shows this:
File size: 406438 bytes
File date: 2003:03:24 20:10:28
Resolution: 2272 x 1704
Jpeg process: Baseline
Comment: Ben FrantzDale
:
File Upload Date: 03-24-2003 20:10:35
Item Capture Date: 03-24-2003 20:10:05
Using jhead -v I get this (from a different picture, but none the less):
COM marker comment: Ben FrantzDale
Jpeg section marker 0xdb size 67
Jpeg section marker 0xdb size 67
JPEG image is 2272w * 1704h, 3 color components, 8 bits per sample
Jpeg section marker 0xc4 size 27
Jpeg section marker 0xc4 size 61
Jpeg section marker 0xc4 size 25
Jpeg section marker 0xc4 size 34
File name : ../albums/malibu-3-2003/IMG_0666.jpg
File size : 176231 bytes
File date : 2003:03:24 20:10:58
Resolution : 2272 x 1704
Jpeg process : Baseline
Comment : Ben FrantzDale
None of this includes exposure information. How much information should Gallery be trying to show?
Thanks.
Posts: 3473
jhead can only display the information that's there: have you put these through an image processing program? Try it with an image straight from the camera:
% jhead IM003147.JPG
File name : IM003147.JPG
File size : 630588 bytes
File date : 2003:03:23 18:19:42
Camera make : PENTAX
Camera model : PENTAX EI-2000 (V01.00)
Date/Time : 2003:03:23 18:19:33
Resolution : 1280 x 1600
Flash used : No
Focal length : 25.8mm
Exposure time: 0.045 s (1/22)
Aperture : f/3.9
Focus dist. : 65.53m
ISO equiv. : 100
Metering Mode: matrix
Jpeg Quality : normal
Jpeg process : Baseline
Posts: 8
Thanks. That did it.