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5.6 Image

This menus groups operations which apply only to images.

Duplicate
This makes a copy of an image.

Crop
This crops out the centre 50% of an image. If you open a viewer on the image you cropped, you'll see a region you can drag to set the crop area. You can also type numbers into the boxes.

Insert
This takes two images and pastes the second into the centre of the first. The two images have to match in number of bands. If you open an image viewer on the first image, you'll see an area which you can drag around to set the exact insert point.

Join=>Left_right, Join=>Top_bottom
Use to join two images together side-by-side. Open up the joined row to change the way the join is made.

Join=>Array
Use to join a rectangular array (a list of lists) of images together. Use Edit=>Group to group all the image rows together, then select all the rows and group again to make the whole array. Click on Join=>Array to join the array into a single large image. Open the row to adjust the spacing.

Rubber=>Find
Use this to automatically calculate a geometric transform which will warp one image to match another. Select a reference image, select a sample image, and click Rubber=>Find. Open up the row to adjust the transformation search parameters. One band, 8 bit images only. The images must be exactly the same size.

Rubber=>Apply, Rubber=>Scale
Use this to apply the transform calculated by Rubber=>Find to another image. Select the transform row, select the image to be transformed and click Rubber=>Apply. Any image type.

Transforms are not scale-invarient: use Rubber=>Scale if you want to use a transform calculated on an image of one size on an image of another size.

Adjust_scale_offset, Adjust_gamma
Use to change the tone curve of an image.

Edit_header
This lets you change the various `informational' fields in the VIPS image header, such as origin, type and resolution.

Match
Use this to match any two images of different sizes. two images to be matched, click Match=>, and drag the points to mark common features. The second image is rotated and scaled to match the first.

Overlay
Use this to make a colour overlay of two monochrome images of different sizes. Select the two images to be used, click Overlay=>, drag the points to mark common features.

Browse_multiband
Use to browse through the bands of a many-band image.


next up previous contents
Next: 5.7 Math Up: 5. Image processing menus Previous: 5.5 Histogram   Contents
John Cupitt 2003-07-21