[split] Jorge's Retracer Thread: darker ink, retracing of text and drawings
Hallucinations on You are not allowed to view links. Register or Login to view. again, but with the Lazarus Project multi-spectral images (which have about twice the resolution of the Beinecke 2014 scans, namely ~27 pixels/mm instead of ~14 pixels/mm)

   

This clip is covers the left end of lines 15-19 of page f1r. It is a composite of three narrow-band images from the Lazarus 2016 Multi-Spectral set: MB940IR_012_F (infrared 940 nm) as red, MB700IR_008_F (near-infrared 700 nm) as green, and MB625RD_006_F (red 625 nm) as blue.
.
This image shows the multiple retracing passes previously observed in the Beinecke 2014 color scans, namely presumed original traces (Rt0, green labels), first general restoration pass (Rt1, cyan labels), and possibly two retouching passes (Rt2, purple labels, and Rt3, pink labels).
.
The dark red-black color or the Rt3 traces means that the ink is substantially opaque to infrared even at 940 nm, as expected from true iron-gall ink Conversely, the lighter orange-yellow color of Rt0 and Rt1 traces means that they are mostly transparent at 940nm, as expected from ocher paint.
.
The passes Rt2 (light red traces) and Rt3 (dark reddish-brown traces) may be the same pass with different ink thickness due to pen recharging, or different light intensity due to warping of the vellum.  See item (D) below.  Eventually I hope to be able to correct for this factor...
  • (A,B,C) Contrast between Rt0 (loop of k and ligature of h), Rt1 (top of left leg and bottom of right leg), and Rt3 (the C and bottom of left leg).
  • (D) Contrast between Rt2 (top) and Rt3 (bottom) versions of o, which may be due to light intensity variations.
  • (E) Anomalous thin strokes of Rt0 Sh retraced by Rt1 with same thin strokes.
  • (F) Faint thin end of original Rt0 plume extending beyond end of Rt3 retrace.
  • (G,H) Faint thin ends of y tails extending beyond Rt1 retraces of the same.
  • (I) Rt1 traces visible under the Rt3 retrace.
  • (J) Rt1 or Rt2 traces visible under Rt3 retrace.
  • (K) The i strokes were Rt1 and their bottom halves are retraced Rt2.
  • (L) The a glyph has left half Rt1,right half Rt2.
  • (M) Plume of n retraced in the wrong direction (clockwise), with butt end.
  • (N) The body of the n is Rt2; the plume is wholly or partly Rt2, traced in the wrong direction.
  • (O) The lower half of the right stroke of the a is Rt0, poking out from under the Rt1 retrace.
  • (P) Top of loop of the d is Rt1, rest is Rt2 or Rt3.
  • (Q) Ambiguity q/y created bt Rt1.

All the best, --stolfi
Reply


Messages In This Thread
Naughty, naughty retracer - by Jorge_Stolfi - 29-09-2025, 12:01 AM
RE: [split] Retracer Thread: darker ink, retracing of text and drawings - by Jorge_Stolfi - 29-11-2025, 02:12 PM
RE: T-O map of f86v3 - by Jorge_Stolfi - 10-12-2025, 03:12 PM
Wellcome Library MS.336. - by Jorge_Stolfi - 02-02-2026, 01:04 AM
RE: Wellcome Library MS.336. - by nablator - 02-02-2026, 01:55 AM
RE: Wellcome Library MS.336. - by Jorge_Stolfi - 02-02-2026, 09:25 AM
Pregnant, or hallucinating? - by Jorge_Stolfi - 24-02-2026, 08:12 PM
RE: Bleedtrhrough of f116r on f116v? - by eggyk - 04-08-2026, 01:05 PM
[split] Retracer etc. - by Stefan Wirtz_2 - 18-11-2025, 04:09 PM
RE: "Dragon" 25v - by Koen G - 18-11-2025, 04:43 PM
RE: "Dragon" 25v - by Aga Tentakulus - 18-11-2025, 05:11 PM
RE: "Dragon" 25v - by Jorge_Stolfi - 18-11-2025, 08:19 PM
RE: "Dragon" 25v - by Bluetoes101 - 18-11-2025, 05:25 PM
RE: "Dragon" 25v - by Stefan Wirtz_2 - 18-11-2025, 05:39 PM
RE: [split] Retracer etc. - by Koen G - 18-11-2025, 05:59 PM
RE: [split] Retracer etc. - by Philipp Harland - 20-11-2025, 10:27 AM
RE: [split] Retracer etc. - by Jorge_Stolfi - 20-11-2025, 12:01 PM
RE: "Dragon" 25v - by Bluetoes101 - 18-11-2025, 06:09 PM
RE: "Dragon" 25v - by Koen G - 18-11-2025, 06:17 PM
RE: "Dragon" 25v - by Jorge_Stolfi - 18-11-2025, 07:11 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  [split by KG - Solution (?) posted in another thread] Isogulaleb1 6 4,383 20-08-2025, 10:37 PM
Last Post: RobGea

Forum Jump:


Users browsing this thread: 6 Guest(s)