Photography – June 2016
Nikon FX DSLR + Samyang 8 mm Fisheye Lens
16 Co-ordinated Points [T1 to T16] on two vertical surfaces parallel to the ‘base line’ between the two 360° Panoramas.

Scenario	Equirectangular Size	Protocol
I	12,000 x 6,000	Known distance between panoramas  =  4.620 m
II	6,000 x 3,000	Known distance between panoramas  =  4.620 m
III	12,000 x 6,000	Known length T1 to T4  =  6.230 m
IV	12,000 x 6,000	Known length T14 to T15  =  1.784 m

			Measurements							Differences
From	To	Measured	I	II	III	IV		From	To	I	II	III	IV
T1	T2	2.384	2.40	2.40	2.40	2.40		T1	T2	-0.02	-0.02	-0.02	-0.02
T1	T4	6.230	6.23	6.23		6.24		T1	T4	0.00	0.00		-0.01
T1	T16	7.587	7.59	7.59	7.59	7.61		T1	T16	0.00	0.00	0.00	-0.02
T2	T8	3.939	3.93	3.93	3.93	3.94		T2	T8	0.01	0.01	0.01	0.00
T3	T4	2.394	2.38	2.38	2.38	2.39		T3	T4	0.01	0.01	0.01	0.00
T4	T13	7.688	7.66	7.67	7.66	7.68		T4	T13	0.03	0.02	0.03	0.01
T5	T6	2.341	2.38	2.38	2.38	2.38		T5	T6	-0.04	-0.04	-0.04	-0.04
T5	T8	6.194	6.21	6.21	6.21	6.22		T5	T8	-0.02	-0.02	-0.02	-0.03
T6	T7	1.469	1.47	1.47	1.47	1.47		T6	T7	0.00	0.00	0.00	0.00
T6	T9	3.275	3.29	3.29	3.29	3.30		T6	T9	-0.02	-0.02	-0.02	-0.03
T7	T8	2.384	2.36	2.36	2.37	2.37		T7	T8	0.02	0.02	0.01	0.01
T7	T12	3.401	3.39	3.39	3.39	3.40		T7	T12	0.01	0.01	0.01	0.00
T9	T10	2.253	2.26	2.27	2.27	2.27		T9	T10	-0.01	-0.02	-0.02	-0.02
T9	T12	6.784	6.75	6.76	6.76	6.77		T9	T12	0.03	0.02	0.02	0.01
T10	T11	1.797	1.78	1.78	1.78	1.79		T10	T11	0.02	0.02	0.02	0.01
T11	T12	2.786	2.76	2.76	2.76	2.76		T11	T12	0.03	0.03	0.03	0.03
T13	T14	2.287	2.28	2.28	2.28	2.28		T13	T14	0.01	0.01	0.01	0.01
T13	T16	6.788	6.79	6.79	6.79	6.80		T13	T16	0.00	0.00	0.00	-0.01
T14	T15	1.784	1.78	1.78	1.78			T14	T15	0.00	0.00	0.00
T15	T16	2.784	2.75	2.76	2.76	2.76		T15	T16	0.03	0.02	0.02	0.02

Comment
The results show no significant difference between using the 72 Mp (12,000 x 6,000) equirectangular and the 18 Mp (6,000 x 3,000) equirectangular although working with the higher definition image it was easier to identify and intersect the points being measured between.
There was also no significant difference between using “Known distance between pano’s” and “Known length” with scenario III (the longer length) and only a small difference between scenario III and scenario IV with the short “Known length”, which is to be expected and it is recommended to always work with a “Known length” similar to the distance between the two 360° Panoramas.

Scenario I
Protocol – “Known distance between pano’s”
Base Line – Panorama A to Panorama B = 4.620 metres
Equirectangular Size = 12,000 x 6,000 pixels

From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff
A	T1	6.941	6.96	-0.02		B	T1	4.685	4.80	-0.11		T1	T2	2.384	2.40	-0.02
A	T2	5.456	5.47	-0.01		B	T2	5.056	5.17	-0.11		T1	T4	6.230	6.23	0.00
A	T3	4.983	4.99	-0.01		B	T3	5.838	5.92	-0.08		T1	T16	7.587	7.59	0.00
A	T4	4.886	4.87	0.02		B	T4	7.428	7.47	-0.04		T2	T8	3.939	3.93	0.01
A	T5	6.546	6.58	-0.03		B	T5	4.148	4.25	-0.10		T3	T4	2.394	2.38	0.01
A	T6	5.048	5.06	-0.01		B	T6	4.631	4.72	-0.09		T4	T13	7.688	7.66	0.03
A	T7	4.473	4.48	-0.01		B	T7	5.435	5.50	-0.07		T5	T6	2.341	2.38	-0.04
A	T8	4.521	4.50	0.02		B	T8	7.209	7.23	-0.02		T5	T8	6.194	6.21	-0.02
A	T9	5.700	5.69	0.01		B	T9	2.364	2.39	-0.03		T6	T7	1.469	1.47	0.00
A	T10	3.805	3.78	0.02		B	T10	2.892	2.93	-0.04		T6	T9	3.275	3.29	-0.02
A	T11	2.644	2.63	0.01		B	T11	4.161	4.18	-0.02		T7	T8	2.384	2.36	0.02
A	T12	2.968	2.94	0.03		B	T12	6.672	6.66	0.01		T7	T12	3.401	3.39	0.01
A	T13	5.787	5.77	0.02		B	T13	2.641	2.57	0.07		T9	T10	2.253	2.26	-0.01
A	T14	3.826	3.82	0.01		B	T14	2.994	2.96	0.03		T9	T12	6.784	6.75	0.03
A	T15	2.769	2.76	0.01		B	T15	4.298	4.27	0.03		T10	T11	1.797	1.78	0.02
A	T16	2.893	2.86	0.03		B	T16	6.655	6.62	0.03		T11	T12	2.786	2.76	0.03
												T13	T14	2.287	2.28	0.01
A	B	4.620	4.62									T13	T16	6.788	6.79	0.00
												T14	T15	1.784	1.78	0.00
												T15	T16	2.784	2.75	0.03

 

Scenario II
Protocol – “Known distance between pano’s”
Base Line – Panorama A to Panorama B = 4.620 metres
Equirectangular Size = 6,000 x 3,000 pixels – Resized from 12,000 x 6,000 to simulate one shot dual lens cameras

From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff
A	T1	6.941	6.97	-0.03		B	T1	4.685	4.81	-0.12		T1	T2	2.384	2.40	-0.02
A	T2	5.456	5.47	-0.01		B	T2	5.056	5.17	-0.11		T1	T4	6.230	6.23	0.00
A	T3	4.983	4.99	-0.01		B	T3	5.838	5.93	-0.09		T1	T16	7.587	7.59	0.00
A	T4	4.886	4.88	0.01		B	T4	7.428	7.48	-0.05		T2	T8	3.939	3.93	0.01
A	T5	6.546	6.59	-0.04		B	T5	4.148	4.25	-0.10		T3	T4	2.394	2.38	0.01
A	T6	5.048	5.07	-0.02		B	T6	4.631	4.72	-0.09		T4	T13	7.688	7.67	0.02
A	T7	4.473	4.48	-0.01		B	T7	5.435	5.51	-0.07		T5	T6	2.341	2.38	-0.04
A	T8	4.521	4.50	0.02		B	T8	7.209	7.23	-0.02		T5	T8	6.194	6.21	-0.02
A	T9	5.700	5.69	0.01		B	T9	2.364	2.39	-0.03		T6	T7	1.469	1.47	0.00
A	T10	3.805	3.78	0.02		B	T10	2.892	2.93	-0.04		T6	T9	3.275	3.29	-0.02
A	T11	2.644	2.64	0.01		B	T11	4.161	4.18	-0.02		T7	T8	2.384	2.36	0.02
A	T12	2.968	2.94	0.03		B	T12	6.672	6.67	0.01		T7	T12	3.401	3.39	0.01
A	T13	5.787	5.77	0.02		B	T13	2.641	2.57	0.07		T9	T10	2.253	2.27	-0.02
A	T14	3.826	3.82	0.01		B	T14	2.994	2.96	0.03		T9	T12	6.784	6.76	0.02
A	T15	2.769	2.76	0.01		B	T15	4.298	4.27	0.03		T10	T11	1.797	1.78	0.02
A	T16	2.893	2.86	0.03		B	T16	6.655	6.62	0.03		T11	T12	2.786	2.76	0.03
												T13	T14	2.287	2.28	0.01
A	B	4.620	4.62									T13	T16	6.788	6.79	0.00
												T14	T15	1.784	1.78	0.00
												T15	T16	2.784	2.76	0.02

Scenario III
Protocol – “Known length”
T1 to T4 = 6.230 metres
Equirectangular Size = 12,000 x 6,000 pixels

From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff
A	T1	6.941	6.96	-0.02		B	T1	4.685	4.81	-0.12		T1	T2	2.384	2.40	-0.02
A	T2	5.456	5.47	-0.01		B	T2	5.056	5.17	-0.11		T1	T4	6.230	6.23
A	T3	4.983	4.99	-0.01		B	T3	5.838	5.92	-0.08		T1	T16	7.587	7.59	0.00
A	T4	4.886	4.87	0.02		B	T4	7.428	7.47	-0.04		T2	T8	3.939	3.93	0.01
A	T5	6.546	6.58	-0.03		B	T5	4.148	4.25	-0.10		T3	T4	2.394	2.38	0.01
A	T6	5.048	5.06	-0.01		B	T6	4.631	4.72	-0.09		T4	T13	7.688	7.66	0.03
A	T7	4.473	4.48	-0.01		B	T7	5.435	5.50	-0.07		T5	T6	2.341	2.38	-0.04
A	T8	4.521	4.50	0.02		B	T8	7.209	7.23	-0.02		T5	T8	6.194	6.21	-0.02
A	T9	5.700	5.69	0.01		B	T9	2.364	2.39	-0.03		T6	T7	1.469	1.47	0.00
A	T10	3.805	3.78	0.02		B	T10	2.892	2.93	-0.04		T6	T9	3.275	3.29	-0.02
A	T11	2.644	2.64	0.01		B	T11	4.161	4.18	-0.02		T7	T8	2.384	2.37	0.01
A	T12	2.968	2.94	0.03		B	T12	6.672	6.66	0.01		T7	T12	3.401	3.39	0.01
A	T13	5.787	5.77	0.02		B	T13	2.641	2.57	0.07		T9	T10	2.253	2.27	-0.02
A	T14	3.826	3.82	0.01		B	T14	2.994	2.96	0.03		T9	T12	6.784	6.76	0.02
A	T15	2.769	2.76	0.01		B	T15	4.298	4.27	0.03		T10	T11	1.797	1.78	0.02
A	T16	2.893	2.86	0.03		B	T16	6.655	6.62	0.03		T11	T12	2.786	2.76	0.03
												T13	T14	2.287	2.28	0.01
A	B	4.620	4.62	0.00								T13	T16	6.788	6.79	0.00
												T14	T15	1.784	1.78	0.00
												T15	T16	2.784	2.76	0.02

 

Scenario IV
Protocol – “Known length”
T14 to T15 = 1.784 metres
Equirectangular Size = 12,000 x 6,000 pixels

From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff		From	To	Measured	PaMe	Diff
A	T1	6.941	6.98	-0.04		B	T1	4.685	4.81	-0.12		T1	T2	2.384	2.40	-0.02
A	T2	5.456	5.49	-0.03		B	T2	5.056	5.18	-0.12		T1	T4	6.230	6.24	-0.01
A	T3	4.983	5.00	-0.02		B	T3	5.838	5.94	-0.10		T1	T16	7.587	7.61	-0.02
A	T4	4.886	4.88	0.01		B	T4	7.428	7.49	-0.06		T2	T8	3.939	3.94	0.00
A	T5	6.546	6.60	-0.05		B	T5	4.148	4.26	-0.11		T3	T4	2.394	2.39	0.00
A	T6	5.048	5.08	-0.03		B	T6	4.631	4.73	-0.10		T4	T13	7.688	7.68	0.01
A	T7	4.473	4.49	-0.02		B	T7	5.435	5.51	-0.08		T5	T6	2.341	2.38	-0.04
A	T8	4.521	4.51	0.01		B	T8	7.209	7.25	-0.04		T5	T8	6.194	6.22	-0.03
A	T9	5.700	5.70	0.00		B	T9	2.364	2.40	-0.04		T6	T7	1.469	1.47	0.00
A	T10	3.805	3.79	0.01		B	T10	2.892	2.93	-0.04		T6	T9	3.275	3.30	-0.03
A	T11	2.644	2.64	0.00		B	T11	4.161	4.19	-0.03		T7	T8	2.384	2.37	0.01
A	T12	2.968	2.94	0.03		B	T12	6.672	6.68	-0.01		T7	T12	3.401	3.40	0.00
A	T13	5.787	5.78	0.01		B	T13	2.641	2.57	0.07		T9	T10	2.253	2.27	-0.02
A	T14	3.826	3.82	0.01		B	T14	2.994	2.96	0.03		T9	T12	6.784	6.77	0.01
A	T15	2.769	2.76	0.01		B	T15	4.298	4.28	0.02		T10	T11	1.797	1.79	0.01
A	T16	2.893	2.87	0.02		B	T16	6.655	6.64	0.01		T11	T12	2.786	2.76	0.03
												T13	T14	2.287	2.28	0.01
A	B	4.620	4.63	-0.01								T13	T16	6.788	6.80	-0.01
												T14	T15	1.784	1.78
												T15	T16	2.784	2.76	0.02