Pixel Color Clustering of Multi-Temporally Acquired Digital Photographs of a Rice Canopy by Luminosity-Normalization and Pseudo-Red-Green-Blue Color Imaging

Table 1

Mean (intensity) values of the color components for major pixel color clusters.

Method	Cluster^†	Number of pixels in  the target frames in  Figures 2(f) and 2(h)	Color in Figures 2(f) and 2(h)		Color components
			Color	Appearance	R	G	B	C	M	Y	K
	1	227	Red		219	195	255	218	196	255	255	210	145	102
	2	1420	Orange		194	193	255	199	199	255	255	204	138	97
	3	4951	Green		84	164	255	107	182	255	255	168	126	75
RGwhtB	4	11436	Blue		213	46	255	151	58	255	255	142	206	60
	5	22156	Purple		127	113	255	97	102	255	255	140	162	58
	Others	66	Black
	Maximum − minimum					149	0	121	141	0	0	70	80	44
	1	267	White		117	210	231	135	241	235	255	202	104	109
	2	117	Red		196	193	241	201	200	255	255	203	136	105
	3	2065	Orange		218	142	239	199	135	255	255	178	169	91
	4	3684	Green		46	204	215	96	242	207	255	191	92	111
RGrgbyB	5	9471	Light blue		206	47	217	162	47	255	255	134	199	77
	6	14608	Blue		130	114	186	117	103	254	255	132	147	92
	7	9891	Purple		106	103	166	85	90	239	255	117	141	94
	Others	153	Black
	Maximum − minimum					163	75	116	195	48	0	86	107	34

Clusters with pixel numbers >100 in the 16 target frames for 21 August to 15 December 2011 (Figure 2).
For maximum − minimum (range), the bold values are larger for either method than the other.