Starguide - A Practical Guide to Astro-Photography

In the previous editing steps, unstretched or linear images were always used. If these were exported, the result would only be a more or less black image. Therefore, the final image must now be stretched in the last step.

In this chapter, we will show you some ways of achieving a stretched final image.

• Histogram Stretch: this is the traditional and the simplest approach
• Masked Stretch: may lead to a flatter image which need further image stretching
• Generalized Hyperbolic Stretch: a script approach to the final stretch

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