PTGui

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Overview

PTGui is an application used to create and edit panoramas by stitching together multiple images.

Project Assistant

The Project Assistant guides you through the creation of a panorama. It can be used in either Simple or Advanced mode. – fig.1

fig.1

Simple Mode

Simple Mode is sufficient for almost all panoramas. Only relevant settings are shown, and the process is done in three directed steps.

1) Click Load Images and select the photos that you are working with. You can also drag and drop images into the PTGui window. The order of images does not matter. – fig.2

fig.2


2) Before proceeding to the next step, PTGui needs to intialize the camera / lens parameters. – fig.3

fig.3


3) If the images don't contain EXIF information, and you have no idea about the lens parameters, just enter the following:

Lens type: Rectilinear (normal lens) Focal length: 35mm Focal length multiplier: 1x. – fig.4

fig.4

4) At this point you are able to add more files using the Source Images tab if you choose. – fig. 5

fig.5

5) You can also use the Mask tab to enhance the images you are using. – fig. 6

fig.6

6) Click Align Images to create control points that are used to match up the images and so that PTGui can optimize and straighten the panorama. – fig. 7

fig.7

7) If you have not selected all of your images, or some do not overlap, you will receive an error message asking you to manually create control points. After doing so, click Align Images again to retry optimizing the panorama. – fig.8

fig.8
fig.8b


8) Once images are aligned, select the Control Points tab to adjust the connecting points of your images. – fig.9

fig.9

9) Selecting the Exposure/HDR tab allows you to adjust the overall appearance of the panorama. – fig.10

fig.10
fig.10b

10) In the Preview tab, you are able to create a low-resolution version of the final panorama before saving the actual file. – fig.11

fig.11

11) To finish the process, click Create Panorama. Before saving, you can adjust the file format, output type and save location. – fig.12

fig.12
fig.12b

Advanced Mode

Using Advanced Mode allows for minute adjustments that are done automatically in Simple Mode.

  • These include:

Lens Settings- fig.13

  • In order to properly remap your images for the panorama, PTGui needs information about the lens type and its field of view.
  • The Individual Lens Settings can be used to indicate images which may have been taken with a different lens.
fig.13

Panorama Settings – fig.14

  • In this menu, you can adjust the projection shape of the panorama.
  • Modifying the horizontal or vertical field of view will change the angle between the top and bottom of the panorama. Changing these values also changes the height and width.
fig.14

Crop – fig.15

  • Cropping is not suggested unless you are using film scans in which the individual rectangles vary slightly in each scan.
  • Cropping is nondestructive, so the original files are not modified. In this tab, all images are cropped in the same way, unless you check the Individual Crop box.
fig.15


Image Parameters – fig.16

  • This tab allows you to numerically adjust settings of individual images.
fig.16

Optimizer – fig.17

  • The Advanced interface gives you full control over what should, and what should not be optimized. Use this interface if you want to exclude certain images or parameters from the optimization process.
fig.17

Project Settings – fig.18

  • Project settings allow you to define what happens when the Align Images function is used, as well as Batch Stitch actions and file naming.
fig.18

Preview – fig.19

  • Advanced Mode allows you to select which images are shown in the preview file in addition to overall width and height adjustment.
fig.19


Create Panorama –fig.20

  • In the Include images box, you are able to remove images from the save file by unchecking the box beside the image name.
  • Using the feather slider, it is possible to change the softness of seams between images. For example, images that have fine details require sharper edges.
  • Using different interpolations create subtle differences in images that are most noticeable around diagonal lines and high contrast areas. This setting may require some experimentation to achieve the desired result.
fig.20

Panorama Editor Window

  • In this window, you will see an editable live preview of the panorama. – fig.21
fig.21

Projection Settings –fig.22

  • Certain projections (such as rectilinear and cylindrical) have additional sliders for horizontal compression and vertical compression. This affects the way the image is compressed near the borders. Click the Projection Settings button to show the sliders, or hide them again using the Hide button.
fig.22

Edit individual images –fig.23

  • In this mode you can edit the position of individual images in the panorama.
  • By dragging with the left mouse button images can be moved around in the output area (effectively changing the yaw and pitch of the selected image).
  • By dragging with the right mouse button (or Ctrl-drag on Mac), images are rotated (which alters the roll).
fig.23

Edit panorama –fig.24

  • This mode edits the panorama as a whole.
  • Drag with the left mouse button to shift the entire panorama, or drag with the right mouse button (or Ctrl-drag on Mac) to rotate the entire panorama around its center.
fig.24

Set center point –fig.25

  • In this mode, you click on a point which will become the new center of the panorama. It has the same effect as dragging that point to the center of the editor in Panorama Edit mode.
fig.25

Fit Panorama –fig.26

  • Modifies the Field of View of the panorama so that the panorama occupies the entire output area. Use it if part of the panorama is not visible, or if there is too much black space around the panorama.
fig.26

Center Panorama –fig.27

  • Centers the panorama in the output area.
fig.27

Straighten Panorama –fig.28

  • This button attempts to straighten the panorama.
fig.28

Numerical Transform –fig.29

  • Here you can shift (rotate) the panorama by a specified number of degrees in any of three axes. The result can be viewed immediately in the panorama editor.
fig.29

Projection –fig.30

  • These buttons are used to change the projected shape of the panorama. More options can be accessed by clicking on the triangle.
fig.30

Detail Viewer –fig.31

  • Allows for zooming in on details of panorama.
fig.31

Preview –fig.32

  • Launches preview in appropriate application of the current projection.
fig.32

Blended mode –fig.33

  • Shows a preview of the blended panorama.
fig.33

No blend –fig.34

  • Creates hard seams between images.
fig.34

Show seams –fig.35

  • Seam location is indicated by red lines, images are not blended.
fig.35

Overlay mode –fig.36

  • Displays the images stacked on top of each other without blending.
fig.36

Image numbers –fig.37

  • Displays numbers of each image in panorama.
fig.37

Always on top –fig.38

  • Ensures that the panorama window floats on top of the main window.
fig.38