Color Matrix¶
Returns a color matrix with the standard R, G, B values compatible with the x-rite ColorCheker Classic, ColorChecker Mini, and ColorChecker Passport targets.
Source: https://en.wikipedia.org/wiki/ColorChecker
plantcv.transform.std_color_matrix(pos=0)
returns color_matrix
-
Parameters
-
pos - reference value indicating orientation of the color card. The reference is based on the position of the white chip:
- pos = 0: bottom-left corner
- pos = 1: bottom-right corner
- pos = 2: top-right corner
- pos = 3: top-left corner
-
-
Returns
- color_matrix - a n x 4 matrix containing the standard red, green, and blue values for each color chip
-
Example use:
- Tutorial in progress
from plantcv import plantcv as pcv
std_color_matrix = pcv.transform.std_color_matrix(pos=0)
# use fixed point notation for printing the matrix
np.set_printoptions(precision=2, suppress=True)
print(std_color_matrix)
[[ 10. 0.45 0.32 0.27]
[ 20. 0.76 0.59 0.51]
[ 30. 0.38 0.48 0.62]
[ 40. 0.34 0.42 0.26]
[ 50. 0.52 0.5 0.69]
[ 60. 0.4 0.74 0.67]
[ 70. 0.84 0.49 0.17]
[ 80. 0.31 0.36 0.65]
[ 90. 0.76 0.35 0.39]
[100. 0.37 0.24 0.42]
[110. 0.62 0.74 0.25]
[120. 0.88 0.64 0.18]
[130. 0.22 0.24 0.59]
[140. 0.27 0.58 0.29]
[150. 0.69 0.21 0.24]
[160. 0.91 0.78 0.12]
[170. 0.73 0.34 0.58]
[180. 0.03 0.52 0.63]
[190. 0.95 0.95 0.95]
[200. 0.78 0.78 0.78]
[210. 0.63 0.63 0.63]
[220. 0.48 0.48 0.47]
[230. 0.33 0.33 0.33]
[240. 0.2 0.2 0.2 ]]
Source Code: Here