Originally Posted by taemo
... didnt apply any sharpness)
Capture sharpening's purpose is to compensate for the fact that demosaiking algorithms are not able to precisely represent a continuous phenomenon using incomplete (i.e. discrete) data. Capture sharpening is a form of spatial mathematical filtering.
So if these two demosaiking algorithms use fundamentally different mathematical models, why wouldn't their optimum sharpening parameters be different? The need for post-rendering sharpening does not necessarily mean a demosaiking algorithm is inferior, similar or superior to one that does not.
Do we know if Iridient applies some form of 'sharpening' during the DNG transformation? Data filtering is typically part of the Demosaiking process..
It is difficult to rigorously compare two completely different rendering platforms. There are numerous variables that affect our perception of images rendered by different platforms. It is likely the parameters that affect these variables behave differently when the demosaiking algorithms are different.
Technical Link (sharpening section starts at slide #24)