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Photos from Sandilands-Selective-Cutting project site on 2003oct15:

These are wide-angle shots taken straight up from the middle of each of the 24 test plots; taken to determine the canopy-closure; have converted each to Black&White, then counted the number of Black pixels, using standard Linux utility programs: pgmtopbm and pbmhist; each is 200x150=30,000 pixels, so the black pixel count over 30,000 gives the percent-shade:
04550-plot07-50: 82.5%

04557-plot06-50: 74.2%

04566-plot05-50: 74.9%

04573-plot04-50: 82.4%

04580-plot03-50: 82.8%

04587-plotT1-50: 79.8%

04593-plot02-50: 78.2%

04600-plotT2-50: 84.8%

04606-plot01-50: 90.3% (wrong focal-length)

04613-plot19-50: 69.5%

04619-plot18-40: 60.7%

04625-plot17-40: 61.8%

04631-plot16-50: 79.1%

04638-plot15-40: 57.0%

04644-plotT4-35: 39.5%

04650-plot14-40: 60.2%

04656-plot13-40: 74.3%

04662-plotT3-40: 80.6%

04668-plot12-50: 71.6%

04675-plot11-25: 38.8%

04681-plot10-45: 48.7%

04687-plot09-45: 84.3%

04695-plot08-45: 78.3%

04702-plot20-35: 16.8%

-- I have 2 shots from many plots; the difference is usually less than 0.5 (percentage points), but as much as 2 or 3, especially when I get my hat into a photo
-- unfortunately at plot01, my zoom-lens was not at the wide-angle setting

-- most are converted to B&W using:   pgmtopbm -threshold -val 0.50;   but some photos are so dark that clouds become black, so they are done with -val 0.45 or 0.40 or 0.35;   here is an example, showing the colour photo, the overdark B&W version, and the "correct" B&W version:

04644-plotT4:

(with 0.50: 67.5%)

(with 0.35: 39.5%)