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How to scan the profiler test set
(unfinished, work in progress)
This document described how to scan the provided test charts from www.testdata.coloraid.de
. It only provide a guidance on how to scan the charts and should not be taken
Preparations and handling
Each user receives five framed slide films and/or five reflective 13x18 (5x7")
reflective prints. Usualy the slides are shipped in a sealed bag with desiccant.
I usualy also provide an evelope and reclosable bag for returning the test charts
Do not touch the targets on the surface. If possible, always wear gloves when
handling the targets. Avoid exposing the test charts to strong light, humidity
or heat. It took many hours peparing the test charts and they can not be replaced
or reproduced. So please, avoid causing scratches or other harm to them!
Do not remove the slide films out of the frames. If you scanner can't scan
slides with their frames, let me know and I will shipp you unframed films.
As we mainly want to adjust and test profilers, you should scan
the target exactly the same way you would normaly scan an IT8 target. The only
request I do make is, scan them with >8 Bit if possible as the density range
of the charts is too big for 8 bit. Use the maximum resolution of your scanner
if possible (but this is not that important). Scan the complete target, with
the margins and not just the rectangle with the patches.
- Do not apply any color profile or other advanced color correction unless
they are required by your scanner software and can not be disabled.
- If your scanner driver doesn't offer any raw scans for profiling, use the
default settings of the scanner driver.
- Avoid setting a black/white point for the scan.
- Do not apply any histogram or tone-curve function.
- Avoid clipping colors. R, G, B values should not reach 255 or 0 (or 65535/0
with 16 Bit). If your scanner clips colors, it is recommended to verify your
scanner driver settings and see if the software or hardware is causing the
Saving the scandata
- You should save the scans into an empty directory.
- Each file saved should indicate the test set number and number of test chart.
You can find this information printed on each slide frame or print.
For instance, if you received the test set 5, save the images in files named:
- The file format used should be either TIFF or PNG if possible. Do not save
images as JPEG unless the software used doesn't support any lossless data
- Create a textfile named readme.txt in the same directry
- Provide as much information about the scan settings used in the textfile
as possible. Very important are (here an example)
- Scanner manufacturer name: Nikon
- Scanner model name: LS 40ED
- Firmware version of scanner: 1.4
- Scanner driver (incl. Version) used: NikonScan 4.0
- Operating system: Windows 2000 SP3
- Scan resolution: 2700dpi
- Scan bit depth used: 12 Bit
- Comments on all details that help repeating your scans by someone else:
ROC/GEM disabled, default driver settings,...
- Your name and email address in case questions come up.
- If you do have several drivers (VueScan, NikonScan, Silverfast) available,
please scan the test charts with each driver and save the results as described
above for each driver in an extra directory.
- If you do own a profiling software, please generate an ICC profile from
the IT8 scan (image 5) and include it too. Also note the used profiling
software (name, version, settings).
- Save all data to a CD-R or DVD. Do not email me scans as they are most likely
too large for emailing.
In order to save postage, reference files are not shipped with the test images.
In case you do want to create a profile based on the test charts, download the
reference files from www.testdata.coloraid.de
Returning the charts
Return all test charts and the data CD/DVD to
Berger Str. 195
In case of further questions, just email or give me a phone call
(phone ++49-69-5486556, mobile ++49-179-6924769):