Difference between revisions of "Hugin Crop tab"

Latest revision as of 07:04, 28 January 2013

Use the Crop tab to indicate the area of the panorama that should be used as output. This crop tab doesn't work on the individual images but on the entire panorama.

Screenshot of the Crop tab; click for larger image

The "Autocrop" and "HDR Autocrop" buttons will adjust the crop rectangle so that it is entirely within the image area, i.e. there will be no "black" borders in the final stitched image (In other words: it determines the maximum number of pixels having no empty, black space). It does this by maximising the area of the rectangle rather than the width or height. This is automatically done when running the Hugin Assistant tab.

To change the cropping at each edge, move the mouse towards that edge until a semi-transparant white box appears along it; then drag with the left mouse button until the edge is where you want it. The area outside the dragging rectangle represents the areas that will be cropped off the panorama. You can move two edges at once by moving the mouse towards the corner shared by the edges until both white boxes appear. If you wish to move the whole region at once, move the mouse into the middle so that all four edges have boxes along them and drag.

This Hugin Crop tab also has the option to display guides in the preview to help you crop the panorama until the composition applies to for example the "rule of thirds."

Note: Cropping the panorama shouldn't be confused with a camera's Crop factor, which is something else entirely.

Note 2: This Hugin Crop tab is not for cropping individual images, like you would do for e.g. fisheye Projection images having a circular area in the middle with a useless black area outside or scanned images that might have edges that need to be cropped away.

@@ Line 1: / Line 1: @@
-Use the '''Crop''' tab to indicate the areas of the input images that [[hugin]] should
+Use the '''Crop''' tab to indicate the area of the panorama that should be used as output. This crop tab doesn't work on the individual images but on the entire panorama.
-exclude from the stitching output.  Note that unlike [[PTGui]], setting [[crop parameters]] in
-hugin doesn't change the [[Field of View]] or optical centre of your images, it simply
-indicates areas of the image to be masked out.
-(In detail, [[hugin]] uses the '''S''' 'selection' parameter in the '''i''' and '''o'''
+[[image:Hugin2013 crop tab.png|thumb|600px|left|Screenshot of the Crop tab; click for larger image]]
-script lines instead of the '''C''' 'crop' parameter)
+{{clr}}
-Note that this image cropping shouldn't be confused with a camera's [[Crop factor]], which is
+The "Autocrop" and "HDR Autocrop" buttons will adjust the crop rectangle so that it is entirely within the image area, i.e. there will be no "black" borders in the final stitched image (In other words: it determines the maximum number of pixels having no empty, black space). It does this by maximising the area of the rectangle rather than the width or height. This is automatically done when running the [[Hugin Assistant tab]].
-something else entirely.
-There are three situations where you might want to use crop parameters in hugin:
+To change the cropping at each edge, move the mouse towards that edge until a semi-transparant white box appears along it; then drag with the left mouse button until the edge is where you want it. The area outside the dragging rectangle represents the areas that will be cropped off the panorama. You can move two edges at once by moving the mouse towards the corner shared by the edges until both white boxes appear. If you wish to move the whole region at once, move the mouse into the middle so that all four edges have boxes along them and drag.
-* With a scanned input image, there are usually black edges or marks along the sides of the image.
+This [[Hugin Crop tab]] also has the option to display guides in the preview to help you crop the panorama until the composition applies to for example the "rule of thirds."
-* With a circular [[Fisheye Projection]] image there are black unexposed areas outside the image circle.
-* Some lenses have a lot of flaring around the edges which you don't want to keep.
-Depending on the input image type, cropping has two different behaviours:
+Note: '''Cropping the panorama''' shouldn't be confused with a camera's [[Crop factor]], which is something else entirely.
-* For circular fisheye photos the crop area is a circle.
+Note 2: This [[Hugin Crop tab]] is not for cropping individual images, like you would do for e.g. [[fisheye Projection]] images having a circular area in the middle with a useless black area outside or scanned images that might have edges that need to
-* For any other input image, the crop area is a rectangle.
+be ''cropped'' away.
-(Change the input image type in the [[Hugin Camera and Lens tab]])
-The '''Crop''' tab features four text boxes for '''Left''', '''Top''', '''Right''' and '''Bottom'''
-where you can manually enter the positions of the four edges.  The origin is top left and numbers
-indicate the distance in pixels from this origin.
-Note that numbers can be negative and can extend beyond the width and height of the photo, this is
-primarily useful for partial fisheye images where the full circle is not visible, in this case the crop circle
-extends beyond the picture frame.
-The default '''Always center crop on d,e''' assumes that all cropping is symmetrical around the
-optical centre of the lens.  This is normal unless you are using the crop feature to
-remove lens flare, in which case the crop may need to be asymmetrical.
-The '''d''' and '''e''' lens parameters setting the position of the optical centre are used by the
-[[Lens correction model]] and are set in the [[Hugin Camera and Lens tab]].
-Select the image to be cropped in the list to the left, you can adjust the position of the crop area
-by dragging the perimeter in the image preview on the right.
 [[Category:Software:Hugin]]

Difference between revisions of "Hugin Crop tab"

Latest revision as of 07:04, 28 January 2013

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