Drplusplus

Joined on Apr 9, 2011

Drplusplus' recent activity

  • I don't have familiarity with this tool so comment is dangerous. But I'll put some suggestions out there and you can correct me or elaborate. (1) That MTF50 and MTF50P are identical suggests that we ...
  • Those MTF10 numbers (above 5000) are beyond even what the D800 or Pentax 645 recorded in Norman Koren's test .  When I asked him about the 0's in the DP1M chart, he replied it was a charting error. ...
  • One other one is at the Imaging Resource site. X3F of DP1M HiRes is here http://www.imaging-resource.com/PRODS/sigma-dp1m/DP1MhRES.X3F.HTM The Imatest Log-F contrast chart is in this one http://www ...
  • Thanks for suggesting this sample, Tom.  I took the DP1M X3F image from DPReview and tried settings such as you suggested.  I agree with your comment on luminance NR and contrast.  I think there ...
  • Sure.  But lots of real images are like that.  My point is that SPP clips the TIFF much harder than the X3F, hence you can't necessarily extrapolate the results from a TIFF image to how SPP treats ...
  • X3F done with DP3M here .  Let me know if this is what you need.
  • Box has an issue, apparently. Let's try Mega. Select "download through browser" https://mega.nz/#!BVJRRYwK!mkA2S1eVauUHSDNHneBqq98U_zPT8pLnx_9B9acxyYc
  • The best argument I've heard for the 10-100 is for video or else where you want to go from very wide to tele quickly (like Sonyshine's rally shots). DxOMark suggests the 10-100 is not as good as ...
  • Not sure if you'll find the image suitable.  I took an X3F and saved it from SPP as a TIFF.  Then I tried the contrast slider in SPP on both the X3F and TIFF, and found the slider has quite ...
  • I'm a little reluctant to conclude that this proves the slider is global for color X3F , since it's possible the UI runs a different contrast function for TIFF. In DxO the overall contrast slider ...
  • I am in agreement with this as a starting point.  I would like to add that SPP probably does different things for Q and M so it may be worthwhile to have a target from both if possible. As prima ...
  • Replied in OTT Acuity
    I'm willing.  It would be useful if a Quattro owner could participate (Tom has both and might have the best samples to work on). Perhaps xpat can start us off so we don't flop around too much.
  • Replied in OTT Acuity
    Your proposal is sensible.  Some problems that we may run into:  we lack definitions of each type of contrast (you made a stab with your measurements 8px apart); microcontrast is traditionally a ...
  • Replied in OTT Acuity
    Hi Priscilla.  I have tried ClearView and I agree it can pep up an image; I think ClearView adds dollops of micro/fine contrast as part of its effect).  However, I check to see that ClearView is ...
  • Replied in OTT Acuity
    Yes, that was my intent.  These may not be ideal for the purpose, but in essence the question is whether SPP's contrast control, even run flat, is adding too much of that micro contrast that at ...
  • Replied in OTT Acuity
    "Measure"--you mean like science?  :-)   Your experiment prompted me to try the following experiment on one of my own X3Fs: (1) First I saved a JPG from SPP at 0 contrast, -0.7 sharpness, and exposure ...
  • Replied in OTT Acuity
    I think I have drawn us off topic here, into comparison of sharpening methods, which I didn't intend. I actually see no need to sharpen the original image. Rick introduced the subject of "local ...
  • Replied in OTT Acuity
    Got it!  Sorry to be slow on the uptake there.  Apparently I can't see winks in emojis... It may be moot, but here's what IrfanView does under Sharpen
  • Replied in OTT Acuity
    Hmm.  I have the impression it's overemphasizing aliasing and other artifacts.  Look at the edge of his left sleeve, for example. I think I get a similar effect if I just open the original with ...
  • Yes, you showed that in one of your earlier posts.  Your crop felt a little narrow to me, but I agreed with you that this was the main axis of interest. I quite agree.
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