Projects:SlicerFAQ:SamplePoints - Revision history

Meier: /* How many sample points should I choose for my registration */

2010-11-16T15:25:34Z

How many sample points should I choose for my registration

Meier at 15:22, 16 November 2010

2010-11-16T15:22:26Z

Meier: /* How many sample points should I choose for my registration */

2010-11-16T15:21:39Z

How many sample points should I choose for my registration

Meier: /* How many sample points should I choose for my registration */

2010-11-16T15:19:16Z

How many sample points should I choose for my registration

Meier: /* How many sample points should I choose for my registration */

2010-11-16T15:15:41Z

How many sample points should I choose for my registration

Meier: /* How many sample points should I choose for my registration */

2010-11-16T15:11:27Z

How many sample points should I choose for my registration

Meier: /* How many sample points should I choose for my registration */

2010-11-16T14:37:00Z

How many sample points should I choose for my registration

Meier: Created page with 'back to Slicer FAQ = How many sample points should I choose for my registration = '''Problem:''' unsure what the ''Sample Points'' setting means or how…'

2010-11-16T14:36:31Z

Created page with '*back to Slicer FAQ = How many sample points should I choose for my registration = *'''Problem:''' unsure what the ''Sample Points'' setting means or how…'

New page

*[[Projects:SlicerFAQ|back to Slicer FAQ]]

= How many sample points should I choose for my registration =
*'''Problem:''' unsure what the ''Sample Points'' setting means or how I could use it to improve my registration.
*'''Explanation:'''All registration modules contain a parameter field that controls how much of the image is sampled when performing an automated registration. The unit is often an absolute count, but in some cases also a percentage. Default settings also vary among modules. The number of samples is an important setting that determines both registration speed and quality. If the sample number is too small, registration may fail because it is driven by image content that insufficiently represents the image. If sample number is too large, registration can slow down significantly.
*'''Fix:''' If registration speed is not a major issue, better to err on the side of larger samples. Most default settings are chosen to yield relatively fast registrations and for most of today's image represent only a small percentage. The table below relates total sample points and percentages to the most common image sizes. Also consider that sample points are chosen randomly so that some points may fall outside the actual object to be registered. That is not a bad thing per se, some background points are important, but not if they are too far from the edges of the object.
Fast Rigid / Linear: 10,000
Fast Affine: 10,000
Fast Rigid: 10,000
Fast Non-Rigid BSpline: 50,000
Expert Automated (Rigid): 1%
Expert Automated (Affine): 2%
Expert Automated (BSpline): 10%
BRAINSfit: 100,000
BRAINSdemon Warp: N/A
Robust Multiresolution: N/A
Surface Registration: 200

@@ Line 34: / Line 34: @@
 |-
 | 128 x 128 x 64
-|1,048,576
+|1048576
 |1.0%
 |4.8%
 |9.5%
 |19.1%
-|~10,000
+|~10000
-|~20,000
+|~20000
-|~52,500
+|~52500
-|~10,0000
+|~100000
-|~200,000
+|~200000
 |-
 |-
 | 256 x 256 x 30
-|1,966,080
+|1966080
 |0.5%
 |2.5%
 |5.1%
 |10.2%
-|~20,000
+|~20000
-|~40,000
+|~40000
-|~97,500
+|~97500
-|~200,000
+|~200000
-|~400,000
+|~400000
 |-
 |-
 | 256 x 256 x 120
-|7,864,320
+|7864320
 |0.1%
 |0.6%
 |1.3%
 |2.5%
-|~77,500
+|~77500
-|~150,000
+|~150000
-|~400,000
+|~400000
-|~775,000
+|~775000
-|~1,500,000
+|~1500000
 |-
 |-
 | 192 x 192 x 192
-|7,077,888
+|7077888
 |0.1%
 |0.7%
 |1.4%
 |2.8%
-|~70,000
+|~70000
-|~150,000
+|~150000
-|~350,000
+|~350000
-|~700,000
+|~700000
-|~1,500,000
+|~1500000
 |-
 |-
 | 512 x 512 x 48
-|12,582,912
+|12582912
 |0.1%
 |0.4%
 |0.8%
 |1.6%
-|~125,000
+|~125000
-|~250,000
+|~250000
-|~625,000
+|~625000
-|~1,250,000
+|~1250000
-|~2,500,000
+|~2500000
 |-
 |-
 | 256 x 256 x 256
-|16,777,216
+|16777216
 |0.1%
 |0.3%
 |0.6%
 |1.2%
-|~175,000
+|~175000
-|~325,000
+|~325000
-|~850,000
+|~850000
-|~1,750,000
+|~1750000
-|~3,250,000
+|~3250000
 |-
 |-
 | 512 x 512 x 160
-|41,943,040
+|41943040
 |0.0%
 |0.1%
 |0.2%
 |0.5%
-|~425,000
+|~425000
-|~850,000
+|~850000
-|~2,000,000
+|~2000000
-|~4,250,000
+|~4250000
-|~8,500,000
+|~8500000
 |}

@@ Line 17: / Line 17: @@
    Robust Multiresolution: N/A
    Surface Registration: 200
-  Image Size        Total Points	10000	50000	100000	200000	1%	         2%	5%	10%	20%
 {| class="wikitable sortable labelpage labelpagetable" border="1"
@@ Line 31: / Line 23: @@
 ! Image Size
 ! Total Points
-! 10000
+! 10,000
-! 50000
+! 50,000
-! 100000
+! 100,000
-! 200000
+! 200,000
 ! 1%
 ! 2%
@@ Line 42: / Line 34: @@
 |-
 | 128 x 128 x 64
-|1048576
+|1,048,576
 |1.0%
 |4.8%
 |9.5%
 |19.1%
-|~10000
+|~10,000
-|~20000
+|~20,000
-|~52500
+|~52,500
-|~100000
+|~10,0000
-|~200000
+|~200,000
 |-
 |-
 | 256 x 256 x 30
-|1966080
+|1,966,080
 |0.5%
 |2.5%
 |5.1%
 |10.2%
-|~20000
+|~20,000
-|~40000
+|~40,000
-|~97500
+|~97,500
-|~200000
+|~200,000
-|~400000
+|~400,000
 |-
 |-
 | 256 x 256 x 120
-|7864320
+|7,864,320
 |0.1%
 |0.6%
 |1.3%
 |2.5%
-|~77500
+|~77,500
-|~150000
+|~150,000
-|~400000
+|~400,000
-|~775000
+|~775,000
-|~1500000
+|~1,500,000
 |-
 |-
 | 192 x 192 x 192
-|7077888
+|7,077,888
 |0.1%
 |0.7%
 |1.4%
 |2.8%
-|~70000
+|~70,000
-|~150000
+|~150,000
-|~350000
+|~350,000
-|~700000
+|~700,000
-|~1500000
+|~1,500,000
 |-
 |-
 | 512 x 512 x 48
-|12582912
+|12,582,912
 |0.1%
 |0.4%
 |0.8%
 |1.6%
-|~125000
+|~125,000
-|~250000
+|~250,000
-|~625000
+|~625,000
-|~1250000
+|~1,250,000
-|~2500000
+|~2,500,000
 |-
 |-
 | 256 x 256 x 256
-|16777216
+|16,777,216
 |0.1%
 |0.3%
 |0.6%
 |1.2%
-|~175000
+|~175,000
-|~325000
+|~325,000
-|~850000
+|~850,000
-|~1750000
+|~1,750,000
-|~3250000
+|~3,250,000
 |-
 |-
 | 512 x 512 x 160
-|41943040
+|41,943,040
 |0.0%
 |0.1%
 |0.2%
 |0.5%
-|~425000
+|~425,000
-|~850000
+|~850,000
-|~2000000
+|~2,000,000
-|~4250000
+|~4,250,000
-|~8500000
+|~8,500,000
 |}

@@ Line 42: / Line 42: @@
 |-
 | 128 x 128 x 64
-| 1048576
+|1048576
-| 1.0%
+|1.0%
-| 4.8%
+|4.8%
-| 9.5%
+|9.5%
-| 19.1%
+|19.1%
-| ~10000
+|~10000
-| ~20000
+|~20000
-| ~52500
+|~52500
-| ~100000
+|~100000
 |-
-| 128 x 128 x 64
+|-
-| 1048576
+| 256 x 256 x 30
-| 1.0%
+|1966080
-| 4.8%
+|0.5%
-| 9.5%
+|2.5%
-| 19.1%
+|5.1%
-| ~10000
+|10.2%
-| ~20000
+|~20000
-| ~52500
+|~40000
-| ~100000
+|~97500
 |}

← Older revision		Revision as of 15:15, 16 November 2010
Line 25:		Line 25:
	256 x 256 x 256 16777216 0.1% 0.3% 0.6% 1.2% ~175000 ~325000 ~850000 ~1750000 ~3250000		256 x 256 x 256 16777216 0.1% 0.3% 0.6% 1.2% ~175000 ~325000 ~850000 ~1750000 ~3250000
	512 x 512 x 160 41943040 0.0% 0.1% 0.2% 0.5% ~425000 ~850000 ~2000000 ~4250000 ~8500000		512 x 512 x 160 41943040 0.0% 0.1% 0.2% 0.5% ~425000 ~850000 ~2000000 ~4250000 ~8500000
		+
		+
		+	{\| class="wikitable sortable labelpage labelpagetable" border="1"
		+	\|-
		+	! Image Size
		+	! Total Points
		+	! 10000
		+	! 50000
		+	! 100000
		+	! 200000
		+	! 1%
		+	! 2%
		+	! 5%
		+	! 10%
		+	! 20%
		+	\|-
		+	\| 128 x 128 x 64
		+	\| 1048576
		+	\| 1.0%
		+	\| 4.8%
		+	\| 9.5%
		+	\| 19.1%
		+	\| ~10000
		+	\| ~20000
		+	\| ~52500
		+	\| ~100000
		+	\|-
		+	\| 128 x 128 x 64
		+	\| 1048576
		+	\| 1.0%
		+	\| 4.8%
		+	\| 9.5%
		+	\| 19.1%
		+	\| ~10000
		+	\| ~20000
		+	\| ~52500
		+	\| ~100000
		+	\|}

← Older revision		Revision as of 15:11, 16 November 2010
Line 17:		Line 17:
	Robust Multiresolution: N/A		Robust Multiresolution: N/A
	Surface Registration: 200		Surface Registration: 200
		+	Image Size Total Points 10000 50000 100000 200000 1% 2% 5% 10% 20%
		+	128 x 128 x 64 1048576 1.0% 4.8% 9.5% 19.1% ~10000 ~20000 ~52500 ~100000 ~200000
		+	256 x 256 x 30 1966080 0.5% 2.5% 5.1% 10.2% ~20000 ~40000 ~97500 ~200000 ~400000
		+	256 x 256 x 120 7864320 0.1% 0.6% 1.3% 2.5% ~77500 ~150000 ~400000 ~775000 ~1500000
		+	192 x 192 x 192 7077888 0.1% 0.7% 1.4% 2.8% ~70000 ~150000 ~350000 ~700000 ~1500000
		+	512 x 512 x 48 12582912 0.1% 0.4% 0.8% 1.6% ~125000 ~250000 ~625000 ~1250000 ~2500000
		+	256 x 256 x 256 16777216 0.1% 0.3% 0.6% 1.2% ~175000 ~325000 ~850000 ~1750000 ~3250000
		+	512 x 512 x 160 41943040 0.0% 0.1% 0.2% 0.5% ~425000 ~850000 ~2000000 ~4250000 ~8500000

@@ Line 4: / Line 4: @@
 *'''Problem:''' unsure what the ''Sample Points'' setting means or how I could use it to improve my registration.
 *'''Explanation:'''All registration modules contain a parameter field that controls how much of the image is sampled when performing an automated registration. The unit is often an absolute count, but in some cases also a percentage. Default settings also vary among modules. The number of samples is an important setting that determines both registration speed and quality. If the sample number is too small, registration may fail because it is driven by image content that insufficiently represents the image. If sample number is too large, registration can slow down significantly.
-*'''Fix:''' If registration speed is not a major issue, better to err on the side of larger samples. Most default settings are chosen to yield relatively fast registrations and for most of today's image represent only a small percentage. The table below relates total sample points and percentages to the most common image sizes. Also consider that sample points are chosen randomly so that some points may fall outside the actual object to be registered. That is not a bad thing per se, some background points are important, but not if they are too far from the edges of the object.
+*'''Fix:''' If registration speed is not a major issue, better to err on the side of larger samples. Most default settings are chosen to yield relatively fast registrations and for most of today's image represent only a small percentage.  Below the defaults for the different registration modules, for version 3.6.1:
    '''Defaults Used in Slicer Modules v.3.6.1'''
    Fast Rigid / Linear: 10,000
@@ Line 18: / Line 18: @@
    Surface Registration: 200
 {| class="wikitable sortable labelpage labelpagetable" border="1"

Projects:SlicerFAQ:SamplePoints - Revision history

Meier: /* How many sample points should I choose for my registration */

Meier at 15:22, 16 November 2010

Meier: /* How many sample points should I choose for my registration */

Meier: /* How many sample points should I choose for my registration */

Meier: /* How many sample points should I choose for my registration */

Meier: /* How many sample points should I choose for my registration */

Meier: /* How many sample points should I choose for my registration */

Meier: Created page with '*back to Slicer FAQ = How many sample points should I choose for my registration = *'''Problem:''' unsure what the ''Sample Points'' setting means or how…'

Meier: Created page with 'back to Slicer FAQ = How many sample points should I choose for my registration = '''Problem:''' unsure what the ''Sample Points'' setting means or how…'