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What is Contour Nesting? Is an option of Caldera’s Visual and Grand ranges

HP_Magda 25th of January 2019

Contour Nesting is one of the functionalities of Caldera’s Visual and Grand ranges. It is dedicated to cut and allows you to take into account the object’s real shape inside the image, so the element can be optimally placed to save media. The purchase of a specific key is required to use this option.

How does it work?
An image is always created in a rectangle, even for PNG files without background or with a transparent background. Using Contour Nesting, Caldera can now find the exterior cut contour and use it to redefine the image. This makes it possible to nest the images by taking into account their real shape and not place them as rectangular bricks. To make this nest, Caldera’s algorithm tests, for every image, its available positions including margins, and selects the best combination of images to save media. The image rotation can be +/- 90° or 180° to search the best nesting layout possible. Please note that median angles are not allowed as testing has shown the final benefit is less important than the loss of time caused by the tests made for these additional angles.


What is bleed area management?
Caldera does not print an images’ background when they are nested with the Contour Nesting option but you can manage the bleed area by using the Bleed option. Bleed area is a standard printing option that adds pixels around the image contour to ensure that the cut will be done inside the printed area and will not go over the media and show a thin, white unprinted piece of media for example.
There are three bleed area methods that can be associated with Contour Nesting:

  • Using the background: we use the document’s background to fill the additional layer. If there is no background, nothing will be added or created.
  • Pixel duplication from the image border: the color of the pixel located at the border of the image is used to fill the additional layer on the other side of the contour. 
  • Mirrored pixel duplication: a symmetry is applied using the contour as the axis of symmetry to fill the pixels of the additional layer. It is used with gradients like the image below to avoid visual breaks between the image and its bleed area. You can compare it with the second method that uses only one color to fill the layer.


In Caldera version 9.20, only the first method, using the image background, is available. The two other methods will be deployed in future releases.

How to use Contour Nesting in Caldera?
Contour Nesting is used in every situation where the regular Nesting is:


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