where is sharpness and contrast in EXIF?

questions about practical use of Neat Image
Post Reply
tko
Posts: 14
Joined: Fri Feb 27, 2004 6:23 pm

where is sharpness and contrast in EXIF?

Post by tko »

OK, the NI manual states that sharpness and contrast settings have an effect on noise, and indeed profile are available at different sharpness and contrast settings. Yet when I look at the EXIF profile I see nothing that indicates either, just a "compression" setting (so many BITS per pixel), which I don't understand.

Does NI automatically match sharpness and contrast settings if profiled? I have downloaded some profiles, and even though my camera is set to "soft" sharpness and "low" contrast the auto profile imports a "hard" profile, which doesn't sound right.
NITeam
Posts: 3173
Joined: Sat Feb 01, 2003 4:43 pm
Contact:

Re: where is sharpness and contrast in EXIF?

Post by NITeam »

tko wrote:OK, the NI manual states that sharpness and contrast settings have an effect on noise, and indeed profile are available at different sharpness and contrast settings. Yet when I look at the EXIF profile I see nothing that indicates either, just a "compression" setting (so many BITS per pixel), which I don't understand.
This is probably because the manufacturer of your camera has decided to go against the EXIF standard and put the information about sharpness and contrast in an inappropriate place. Both these parameters should be available in the standard part of the EXIF which would be readable by most EXIF-aware software.
Does NI automatically match sharpness and contrast settings if profiled?
Not yet but it will do so in one of the next versions.
I have downloaded some profiles, and even though my camera is set to "soft" sharpness and "low" contrast the auto profile imports a "hard" profile, which doesn't sound right.
In this situation, just delete the "hard" profiles if you never use hard sharpness in camera.

Vlad
tko
Posts: 14
Joined: Fri Feb 27, 2004 6:23 pm

here's what I mean

Post by tko »

Does NI use more EXIF information that what shows in its window? I don't even see exposure time!

What Neat Image gives me in the EXIF information window:
Device maker: Panasonic
Device model: DMC-FZ10
ISO level: 50
Compression: 4 bits/pixel
Exposure time: 1/401s
Exposure bias: 0.00 eV
White balance: Daylight

What another EXIF reader gives me for the same picture:

Field Value
Image input equipment manufacturer Panasonic
Image input equipment model DMC-FZ10
Orientation of image The 0th row is at the vis...
Image resolution in width direction 72
Image resolution in height direction 72
Unit of X and Y resolution inches
Software used Ver1.05
File change date and time 2003:11:18 13:39:51
Y and C positioning co-sited
Exposure time 0.002 (10/5000)
F number 4.600 (46/10)
Exposure program Normal program
ISO Speed rating 50
ExifVersion { 30 32 32 30 }
Date and time of original data genera... 2003:11:18 13:39:51
Data and time of digital data generati... 2003:11:18 13:39:51
Meaning of each component { 00 03 02 01 }
Image compression mode 4
Shutter speed 8.966 (8966/1000)
Aperture 4.400 (44/10)
Exposure bias 0.000 (0/100)
Maximum lens aperture 3.000 (30/10)
Metering mode Pattern
Light source Daylight
Flash 16
Lens focal length 6.800 (68/10)
Supported FlashPix version { 30 30 31 30 }
Colorspace information 1
Valid image width 00000900
Valid image height 000006c0
Sensing method One-chip color area se...
File source 00
Scene type 00
CFA pattern { 00 02 00 02 01 00 02 ...
Interoperability index
Interoperability version { 30 30 31 30 }
NITeam
Posts: 3173
Joined: Sat Feb 01, 2003 4:43 pm
Contact:

Re: here's what I mean

Post by NITeam »

tko wrote:Does NI use more EXIF information that what shows in its window? I don't even see exposure time!
Yes, it uses the information shown in its window. The exposure time is also there.

In principle, NI does not show all EXIF fields, so comparing it with a general EXIF reader is not very useful. Only those EXIF fields are shown by NI that (1) could be extracted from the input image and (2) are important for noise reduction.

Vlad
Post Reply