Hugin Photos tab - Revision history

Thomas: /* Feature Matching */

2013-04-26T15:40:42Z

‎Feature Matching

Thomas: /* Geometric (Simple and Advanced User interface) */

2013-01-30T17:21:23Z

‎Geometric (Simple and Advanced User interface)

Thomas: /* Images table options */ Drag and drop

2013-01-30T17:20:39Z

‎Images table options: Drag and drop

Thomas: /* Context menu */

2013-01-30T17:18:58Z

‎Context menu

Harryvanderwolf: /* The Custom parameters */

2013-01-30T14:25:09Z

‎The Custom parameters

Harryvanderwolf: /* The Custom parameters */

2013-01-30T14:24:52Z

‎The Custom parameters

Harryvanderwolf: /* Geometric (Simple and Advanced User interface) */

2013-01-30T13:58:45Z

‎Geometric (Simple and Advanced User interface)

Harryvanderwolf: /* Positions (incremental, starting from anchor) */

2013-01-30T13:47:13Z

‎Positions (incremental, starting from anchor)

Harryvanderwolf: /* The Custom parameters */

2013-01-30T13:44:41Z

‎The Custom parameters

Harryvanderwolf: /* Photometrics */

2013-01-30T13:40:55Z

‎Photometrics

@@ Line 240: / Line 240: @@
 Automatic creation of [[control points]] can be done by pressing the '''Create control Points''' button (if you select just some images, then control points will only be found for those selected). With the dropdown selector in front of the '''Create control Points''' button, you select which control point generator (feature matcher) to use for detecting the control points and adding them to the project.
-These control point generators (feature matchers) need to be configured in [[Hugin Preferences#Control_Point_Detectors|Preferences->Control Point Detectors]]. Hugin comes standard with [[cpfind]] and [[align_image_stack]] configured for a number of situations.  The [[Hugin Preferences#Control_Point_Detectors|Hugin Preferences]] can be used to set further options and to add new tools to the list or another instance of the same ''Control Point Detector'' with other settings (like for rectilinear images or for (full) frame fisheye for example.
+These control point generators (feature matchers) need to be configured in [[Hugin Preferences#Control_Point_Detectors|Preferences->Control Point Detectors]]. Hugin comes standard with [[cpfind]] and [[align_image_stack]] configured for a number of situations.  The [[Hugin Preferences#Control_Point_Detectors|Hugin Preferences]] can be used to set further options and to add new tools to the list or another instance of the same ''Control Point Detector'' with other settings (like for rectilinear images or for (full) frame fisheye for example. If you hold down the control key (Command key on Mac OS) when pressing this button. you can specify the number of control points per overlap. Note: Not all control point detectors support this parameter.
 The '''Remove control Points''' option from the [[Photos_tab#Context_menu|context menu]] option ''Control Points'' does exactly what its name suggests, it removes control points between the selected images, or all control points if no image is selected.

@@ Line 250: / Line 250: @@
 == Geometric (Simple and Advanced User interface) ==
-[[hugin]] uses a photo alignment scheme where it adjusts image orientation and lens settings of source photos
+[[Hugin]] uses a photo alignment scheme where it adjusts image orientation and lens settings of source photos
 until the [[control points]] line-up. This process is called ''optimisation''.

@@ Line 70: / Line 70: @@
 * a '''double-click''' action which opens the [[Hugin_Photos_tab#Edit_image_variables|Edit image variables]] popup where the image parameters can be examined and/or edited.
 * a '''right-click action''' inside the table which opens a [[Hugin_Photos_tab#Context_menu|Context menu]] is opened.
 === Edit image variables popup ===

@@ Line 142: / Line 142: @@
 ! One image selected
 ! Multiple images selected
 |-
+|

← Older revision		Revision as of 14:25, 30 January 2013
Line 301:		Line 301:

	For example, when shooting hand-held panoramas, some of the position variation between shots can be resolved by using different '''d''' and '''e''' '''Image Center Shift''' parameters for each shot. Select '''Custom parameters''', and pick the '''d''' and '''e''' parameters for optimisation on the [[hugin Optimiser tab]].		For example, when shooting hand-held panoramas, some of the position variation between shots can be resolved by using different '''d''' and '''e''' '''Image Center Shift''' parameters for each shot. Select '''Custom parameters''', and pick the '''d''' and '''e''' parameters for optimisation on the [[hugin Optimiser tab]].
		+
	Similarly, the translation parameters (X, Y, Z) could be used to correct a wonky shot.		Similarly, the translation parameters (X, Y, Z) could be used to correct a wonky shot.

@@ Line 298: / Line 298: @@
 === The Custom parameters ===
-The pre-set optimisation options are useful for most situations, but often it is necessary to switch to '''Custom parameters'''.
+The pre-set optimisation options are useful for most situations, but sometimes it is necessary to switch to '''Custom parameters'''.
 For example, when shooting hand-held panoramas, some of the position variation between shots can be resolved by using different '''d''' and '''e''' '''Image Center Shift''' parameters for each shot.  Select '''Custom parameters''', and pick the '''d''' and '''e''' parameters for optimisation on the [[hugin Optimiser tab]].
+Similarly, the translation parameters (X, Y, Z) could be used to correct a wonky shot.
-Similarly, the translation parameters could be used to correct a wonky shot. However, they were meant for linear panoramas which expand to infinite distance at 180 degrees field of view, so you must make sure any images with non-zero translation (X, Y, or Z parameters) are in the middle of the panorama (y and p should all be around zero, and the field of view shouldn't be large enough to make them expand more than 180 degrees). This can be used to patch in the floor after you have removed the tripod that was obscuring it. You can take a shot of the floor where the tripod was at an angle (therefore you can avoid casting a shadow on the image in most cases). You can then optimise X,Y,Z on only this image. However, the floor must be flat for this to work, and this shot must be in the middle of the panorama. You can make down the middle by rotating the panorama on either of the previews.
 The custom parameters are controlled in detail on the [[Hugin Optimiser tab]].

@@ Line 256: / Line 256: @@
 * The lens has minimal [[barrel distortion]] and the photo [[EXIF]] information supplies an accurate [[Field of View]].
 or
-* [[Lens calibration]] has already been performed, saved to a file and loaded into the current project via the [[hugin Camera and Lens tab]].
+* [[Lens calibration]] has already been performed, saved to a file and loaded into the current project via the right-click option in the [[Hugin Photos tab#Context menu|Context menu]].
 Note that to align any pair of photos, there should be at least two pairs of [[control points]] connecting them.

@@ Line 303: / Line 303: @@
 Similarly, the translation parameters could be used to correct a wonky shot. However, they were meant for linear panoramas which expand to infinite distance at 180 degrees field of view, so you must make sure any images with non-zero translation (X, Y, or Z parameters) are in the middle of the panorama (y and p should all be around zero, and the field of view shouldn't be large enough to make them expand more than 180 degrees). This can be used to patch in the floor after you have removed the tripod that was obscuring it. You can take a shot of the floor where the tripod was at an angle (therefore you can avoid casting a shadow on the image in most cases). You can then optimise X,Y,Z on only this image. However, the floor must be flat for this to work, and this shot must be in the middle of the panorama. You can make down the middle by rotating the panorama on either of the previews.
-The custom parameters are controlled in detail on the [[hugin Optimiser tab]].
+The custom parameters are controlled in detail on the [[Hugin Optimiser tab]].
 == Photometric (Simple User interface) ==

@@ Line 402: / Line 402: @@
 and modify these values on the [[Hugin Exposure tab]].
-=== Vignetting ===
+If you want to adapt the values for '''Vignetting''' and '''Camera response''' you need to select the '''Custom Parameters''' and modify these values on the
+[[Hugin Exposure tab]].
-[[Vignetting]] is dependent mainly on your lens and the ''aperture''. Usually the
-centre of the image is brighter with a falloff towards the edges.  The three
-numbers here represent a polynomial curve used by [[hugin]] to correct vignetting.
-−
-You are not expected to guess these values, they are generally loaded with a lens
-profile or calculated from two or more overlapping photos.
-−
-Set the values to ''0,0,0'' for no vignetting correction.
-−
-Usually all photos taken with the same ''lens'' will have the same vignetting, keep
-'''Link''' checked to ensure '''hugin''' applies the same vignetting correction to all
-photos with the selected lens number.
-−
-=== Vignetting Center Shift ===
-−
-The centre of [[vignetting]] is rarely the exact centre of the photo. The two numbers
-here indicate the position of the vignetting centre. The scale is in pixels, with
-''0,0'' indicating the centre of the photo. The values are independent of the '''d'''
-& '''e''' parameters which specify the origin for projection and geometric distortion.
-−
-<!-- As with other lens parameters, this '''Vignetting Center Shift''' can be optimised in
-the [[hugin Exposure tab]].  Keep '''Link''' checked to ensure [[hugin]] applies the same
-vignetting centre to all photos with the selected lens number. -->
-−
-=== Camera Response ===
-−
-The [[camera response curve]] is used both for mapping the images to a linear
-colourspace when creating [[HDR]] output, and for normalising the colourspace
-for internal vignetting, brightness and colour corrections when creating
-'normal' '''LDR''' output.
-−
-[[hugin]] uses the [http://www1.cs.columbia.edu/CAVE/projects/rad_cal/rad_cal.php EMoR response model]
-from the Computer Vision Lab at Columbia University which simplifies the full
-response curve to these five empirical coefficient numbers.  You are
-not expected to guess these values, they are generally loaded with a lens
-profile or calculated from two or more overlapping photos.
-−
-Set the five numbers to ''0,0,0,0,0'' to use a generic response curve or change the '''Type'''
-to '''Linear''' to indicate that your input photos have a ''scene-referred'' or [[HDR]]
-response.
-−
-Keep '''Link''' checked to ensure '''hugin''' applies the same
-response curve to all photos with the selected lens number.
 = Exposure =