Mikrotron eosens TS3, Руководство пользователя, Страница: 118 / 120

TS3 User Manual
11S-3000M
page 109
Application Note 6: Choosing an Image File Format
TS3 and TS3 cameras are capable of outputting im ag es in 7 di ff erent file f ormats. These format
serve di ff erent purposes depending on imaging and work fl o w requirements.
JPEG images are compressed in order to take the least space. A recording saved as JPEGs results in
an image stack, whereby each frame is a file. JP E G compression quality (0-100, with 100 being
highest quality, lowest compression) may be selected by the user in the camera User Preferences
menu. Default “JPEG Qfactor” is 80, which results in compression of 10:1 to 20:1 for average scenes.
AVI files a
e basically JPEGs placed in a “wrapper,” resulting in one video file t ha t is playable on
many popular video players.
BMP and TIF files a
e almost identi c al--both being uncompressed, fully processed images. Like
JPEGs they are saved as stacks, but are much larger.
DNG, TIF(raw), and CAP files a
r e raw formats, meaning that color images are not interpolated. Color
interpolation t akes 8-bit images and colorizes them, which produces 24-bit files 3x as la r ge. DNG
and TIF(raw) files a r e smaller than BMP and TIF files. DNG and TIF( r aw) are stacks, while CAP files
c ontain a whole “Session” of images.
• JPEG: JPEG compressed, user selectable compression, saved as video stacks. All image and color
processing done on camera. 8-bit data only is preserved so output is 8-bits/pixel mono, or 24-
bits/pixel color.*
• AVI: Motion JP E G compressed, user selectable compression, user selectable playback rate, saved
as one file. All ima g e and color processing done on camera. 8-bit data only is preserved so output
is 8-bits/pixel mono, or 24-bits/pixel color.*
• DNG: Not compressed, raw format with “as shot” parameters saved within images. 8-bit or 10-bit
data preserved (for producing 24-bit or 30-bit color images). Available on color cameras only. All
image processing excluding FPN correction, but including c olor interpolation, brig h tness, contrast,
gamma, color gains, etc. to be done o ff -camera in 3rd-party soft w are. Compatible with Adobe an
Black Magic imaging soft w are. 8-bit images saved 8 bits/pixel; 10-bit images saved 16 bits/pixel
• BMP: Not compressed. Saved as video stacks. Bitmap. All image and color processing done on
camera. 8-bit data only is preserved so output is 8-bits/pixel mono, or 24-bits/pixel color.*
• TIF: Not compressed. Saved as video stacks. Almost identi c al in size and specifi c ation t o
BMP, but has added “TIFF tags.” All image and color processing done on camera. 8-bit data
only is preserved so output is 8-bits/pixel mono, or 24-bits/pixel color.*
• TIF (raw) Not compressed. Saved as video stacks. 8-bit or 10-bit data preserved (for producing 24-
bit or 30-bit color images and 8-bit or 10-bit mono images). 8-bit data is saved as uninterpolated
8-bit images. 10-bit data is saved as uninterpolated 16-bit images. Similar to DNG format, except
that the “as shot” values must be parsed from the metadata files (not wri tt en into the image
files)
• CAP: Proprietary MIKROTRON “partition capture” image format. Raw image data from sensor is
saved in a file along with FPN correction (black frame), as well as “as shot” parameters. 8-bit or
10-bit data is preserved. CAP files may be loaded back into camera image memory, then saved
again to any media in any of the other formats.
*Note: When 10-bit data is recorded, all 10 bits are used in the 16-bit image processer. For formats
that only save 8-bit data, this means that all of the image processing done still uses all of the 10-bit
data and there still m a y be a discernible (certainly a measurable) di ff erence in the 8-bit processed
images produced. (If you capture both 10-bit and 8-bit images of the same scene, then save them
as 8-bit color images, the ones captured in 10 bits will have a higher number of discrete colors than
those captured in 8 bits.