FilmStar User Manual
Contents
1. FilmStar User Manual www rickthurmond com Purpose FilmStar enables you to easily and precisely align astronomical images taken on black and white film with tri color filters Those of you still crazy enough to use hypered Techpan should be thrilled Technical Specifications FilmStar is designed around the needs of film users with large scan files It is expected that the images have relative rotation scaling and offset typical of the film astrophotography and scanning processes FilmStar uses the advanced graphics capabilities of MacOS X specifically Corelmage s affine transform and custom filter capabilities You ll need Mac OS X 10 4 The program is a universal binary and should run on any modern Mac If you have huge images it is helpful to have lots of memory I ve combined three 84 MByte files on a machine with 2 GBytes RAM FilmStar can read and output 16 bit per channel TIF images Workflow Before starting up FilmStar you need to scan your three astronomical images as monochrome TIF files You could then align and combine the images in Photoshop but that is tricky and not very precise Now in FilmStar 1 Open the three monochrome images representing the red green and blue exposures by pressing the Open Red Image Open Green Image and Open Blue Image buttons or through the File menu Each image appears in its own view 2 On each of the three images select one of the stars to be used for alignment When you click on2. a star the view is zoomed to allow you to more precisely pick the star A magenta box is drawn around the star That star represents Point 1 3 Select the button called Choose Point 2 then select corresponding stars on the three views again The stars should be not too close to the Point 1 stars though they should also not be out at the extremes of the image Point 2 stars get a cyan box drawn on them Same for Point 3 4 Hit Align Images to redraw the Combined View which should now have al three layers precisely aligned 5 Hit Save Combined Image or select File gt Save Combined Image to make a TIF file of the combined image Now open the combined image in Photoshop and crop and make other adjustments as appropriate FilmStar Open Red Image Open Green Image Open Blue Image Zoom Factor O Choose Point 1 2 Choose Point 2 E v a Y Choose Point 3 10 40 Align Images Save Combined Image
Download Pdf Manuals
Related Search