Re: Ex-Sperry-ment #3 - the Climax . . . 
| April 22, 2021 07:57PM |
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Hello once more -
Please forgive the foreign subject of this series, and that she's standard gauge — but IMHO a final test was needed.
It appears that Olaf had gotten a new camera when he sneaked ("snuck" is apparently not a real word) across the border into British Columbia in late September of 1970 to catch the last run of Hillcrest Lumber Co. Climax #10 on her home railroad, as the initial scan used here seems quite a bit sharper than the D&RGW photo used above, and only a little brightening and color correction – and no sharpening – was applied before copying the adjusted .tif file as a .jpg for uploading to the NGDF as follows:
Example #1 is the original, slightly trimmed to 5120×3072 pixels (500 dpi), saved at a .jpg compression level of 46 to reduce the file size to an acceptable 2.399 MB:
Example #2 is the above file, resized down to 3072×2048 pixels (300 dpi), saved at a .jpg compression level of 74 to produce an acceptable file size of 2.407 MB:
Example #3 is this same file, resized down to 1024×683 pixels (100 dpi), saved at the same compression level of 74 yielding a much smaller file size of 0.369 MB:
My geezerly eyes cannot detect any significant differences in the NGDF's final output at 1024 pixels wide (per settings discussed above), but I will agree that a 369K .jpg at 74 quality is certainly going to be sharper than one 1020 pixels wide at quality level 65 — or 50 . . .
Example #4 is the exact same photo as #3 above, but with the 'Unsharp Mask' applied at 60% with Radius set to 1.5 and Threshold set to 2 levels, then saved at jpg compression level 50 to get a smaller file size circa 250K (actually 253K in this case):
Photos copyright © 1970, 2021 by Olaf Rasmussen - All Rights Reserved.
IMHO, the smaller - but sharpened - Example 4 appears significantly better than the less compressed Example 3.
- El Abuelo Histœrico, Greengo y Curmudgeoño de los Locomoturas Viejos y Verdes,
aka Der Grossväterlich DünkelOlivGrünDampfKesselMantelLiebHabender
Edited 3 time(s). Last edit at 04/23/2021 06:41PM by Russo Loco.
Please forgive the foreign subject of this series, and that she's standard gauge — but IMHO a final test was needed.
It appears that Olaf had gotten a new camera when he sneaked ("snuck" is apparently not a real word) across the border into British Columbia in late September of 1970 to catch the last run of Hillcrest Lumber Co. Climax #10 on her home railroad, as the initial scan used here seems quite a bit sharper than the D&RGW photo used above, and only a little brightening and color correction – and no sharpening – was applied before copying the adjusted .tif file as a .jpg for uploading to the NGDF as follows:
Example #1 is the original, slightly trimmed to 5120×3072 pixels (500 dpi), saved at a .jpg compression level of 46 to reduce the file size to an acceptable 2.399 MB:
Example #2 is the above file, resized down to 3072×2048 pixels (300 dpi), saved at a .jpg compression level of 74 to produce an acceptable file size of 2.407 MB:
Example #3 is this same file, resized down to 1024×683 pixels (100 dpi), saved at the same compression level of 74 yielding a much smaller file size of 0.369 MB:
My geezerly eyes cannot detect any significant differences in the NGDF's final output at 1024 pixels wide (per settings discussed above), but I will agree that a 369K .jpg at 74 quality is certainly going to be sharper than one 1020 pixels wide at quality level 65 — or 50 . . .
Example #4 is the exact same photo as #3 above, but with the 'Unsharp Mask' applied at 60% with Radius set to 1.5 and Threshold set to 2 levels, then saved at jpg compression level 50 to get a smaller file size circa 250K (actually 253K in this case):
Photos copyright © 1970, 2021 by Olaf Rasmussen - All Rights Reserved.
IMHO, the smaller - but sharpened - Example 4 appears significantly better than the less compressed Example 3.
- El Abuelo Histœrico, Greengo y Curmudgeoño de los Locomoturas Viejos y Verdes,
aka Der Grossväterlich DünkelOlivGrünDampfKesselMantelLiebHabender
Edited 3 time(s). Last edit at 04/23/2021 06:41PM by Russo Loco.
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488 stops for water at Los Pinos tank on closing day Oct. 1979. Photo courtesy Don Richter
The NGDF was started by Don Richter and is currently operated in his memory by Nathan Holmes and others. Others who have contributed to the upkeep of this board are (in no particular order): Charles McCandless, Everett Lueck, Ted Wilton, Cole Adams, James Bane, John Moellmer, Jon Bentz, Linn Moedinger, lloyd lehrer, Rod Jensen, John Craft, Steven Forney, Herb Kelsey, Bill Ramaley, Russ Sperry (El Russo Loco), Josh McNeal, John West, Jim Armstrong, Bob Bergstrom, Greg Scholl, Blake Forbes Doug van Veelen and Mark Fuller.