Celestron NexImage Solar System Imager User Guide - Page 25

Image Processing Screen This is the most interesting phase of RegiStax. This is where your stacked image is processed with wavelets. Wavelet processing is similar to a series of unsharp masks applied to an image to strip information from that image into separate layers. Upon entry in this page you will see the previously stacked image.You can reach this page either by pressing Align & Stack in the Align Frames page or pressing the Stack in the Stack Frames page. 12 1 13 14 2 3 4 5 6 8 9 10 17 11 7 15 16 1. Wavelet Scheme - This control sets the scales for the wavelet layers. Dyadic means you will use a fixed set of layers, 1,2,4,8,16 and 32 bits in width (not often useful). Linear scaling means you can set the layers in many different fashions. The scale of the first layer is set by the Initial setting. Every subsequent layer is increased in size with the Step-value. So a setting of 1/0 leads to all layers set to size =1. When using 1/1 we get 1,2,3,4,5,6 etc. The size of the layer controls the size in pixels of the blurring filter used to construct the layers. Small values are useful for small-scaled (few pixels and sharp images) features and large values for larger scaled features. The "best" settings depends on the imaged subject and the image-scale during recording (Eyepiece, telescope etc). Use these settings in combination with the wavelet-filter settings. 24