Converting Spyderprint 225 patch target to i1Profiler

[pharmacist]

Having read the Spyderprint 225 high quality target should produce nice profiles, I decided to make a custom profile based on the Spyderprint 225 patch high quality target:

This profile is based on RGB: 5x5x5=125 steps + extra near neutral patches + some grey patches up to 225 patches. I think the trick of the good results of this target, despite its limited patch count (only 225), is thanks of the large amount of near neutral patches, so the grey axis is much better estimated using a limited amount of patch sampling, resulting in very good profiles despit the limited patch count.

Because the i1Pro2 is superior to the Spyderprint device, I decided to make a similar target for the i1Pro2 for th i1Profiler software using a base 131 patch base target of which the last 6 patches I removed from the file using the patch editor function in i1Profiler:

The last 6 patches has been removed in the patch editor function of i1Profiler and using the Photoshop function to determine the exact RGB-value of the Spyderprint high quality target of the additional colours I added the extra 100 patches of the Spyderprint target to this custom 225 patch i1Profiler target and this is the result of the target:

The whole target can be printed an small 10x15 cm photo card enabling profiling using only a small piece of photo paper, I printed the test target using this limited 225 patch count target and a much larger 918 patch target (based on the TC9.18 printer target) and this is the result:

I can see hardly any difference and the result is identical to me, including the dark shadows (no lost of details).

 

[crenedecotret]

Having read the Spyderprint 225 high quality target should produce nice profiles, I decided to make a custom profile based on the Spyderprint 225 patch high quality target:

View attachment 16956

This profile is based on RGB: 5x5x5=125 steps + extra near neutral patches + some grey patches up to 225 patches. I think the trick of the good results of this target, despite its limited patch count (only 225), is thanks of the large amount of near neutral patches, so the grey axis is much better estimated using a limited amount of patch sampling, resulting in very good profiles despit the limited patch count.

Because the i1Pro2 is superior to the Spyderprint device, I decided to make a similar target for the i1Pro2 for th i1Profiler software using a base 131 patch base target of which the last 6 patches I removed from the file using the patch editor function in i1Profiler:

View attachment 16957

The last 6 patches has been removed in the patch editor function of i1Profiler and using the Photoshop function to determine the exact RGB-value of the Spyderprint high quality target of the additional colours I added the extra 100 patches of the Spyderprint target to this custom 225 patch i1Profiler target and this is the result of the target:

View attachment 16958

The whole target can be printed an small 10x15 cm photo card enabling profiling using only a small piece of photo paper, I printed the test target using this limited 225 patch count target and a much larger 918 patch target (based on the TC9.18 printer target) and this is the result:

View attachment 16959
I can see hardly any difference and the result is identical to me, including the dark shadows (no lost of details).

This is pretty interesting! I have both a colormunki and an old spyderprint. I was considering trying to convert the values from the Spyder test chart for ti1/ti2 files for argyllcms

My reasoning is that the Spyder hardware is reportedly not that bad. I always wanted to try to find a way to feed the data into argyllcms in case my colormunki every breaks down.

How did you extract all the rgb values? By hand in something like Photoshop?

 

[crenedecotret]

Wow sorry. You did mention using Photoshop.. My bad

 

[pharmacist]

When combining the Spyderprint 255 patch high quality target + gray ramp target, you get this in i1Profiler:

I think the sampling of measurement points around the grey and neutral axis is pretty high now, which should very good black and white printing using this target.

 

[Dr_Nick]

This is pretty interesting! I have both a colormunki and an old spyderprint. I was considering trying to convert the values from the Spyder test chart for ti1/ti2 files for argyllcms

My reasoning is that the Spyder hardware is reportedly not that bad. I always wanted to try to find a way to feed the data into argyllcms in case my colormunki every breaks down.

How did you extract all the rgb values? By hand in something like Photoshop?

That's actually something I did a while ago. You can use Spyder Print with argyll but it requires some messing around with files.

You can start with any ti1/ti2 files you like. @pharmacist 's 480 patch target, for instance, happens to be quite suitable for the spyder Print. What you suggest (converting spyder print targets to ti1/ti2) could also be a good starting point.

The Spyder Print software allows spot measurements and it can write the L*a*b values to simple text files. Then you copy those values into a .ti3 file generated by argylls fakeread command and with this .ti3 file you generate your icc profile as usual. However, this is quite a tedious process because you cannot use the strip reading mode of the instrument (you are limited to spot readings), you need to make sure that all measurements are in the right order and you need to be careful when doing the text editing operations. It should be possible to write a script to make at least the text editing / file conversion operations easier.

That being said, the resulting profiles are in my experience very similar to those created with a color Munki device which I also own. Which suggests that the Spyder Print device is actually not as bad as commonly suggested. IMHO, the poor results often reported are much more due to Datacolor's software than to the device itself.

 

[pharmacist]

I just produced a target using the above combined high quality target + grays (from the Spyderprint target) and used i1profiler to produce the profile. The result is indeed very good: a nice rounded target without any indentation or strange curvings: