Hello, I once found two stacks with the names
ImageTrans.rev and one with altMakeTrans.rev from altuit which both do what you want and have the necessary scripts within. Try altuit ... Mit freundlichen Grüßen Franz Böhmisch [EMAIL PROTECTED] http://www.animabit.de GF Animabit Multimedia Software GmbH Am Sonnenhang 22 D-94136 Thyrnau Tel +49 (0)8501-8538 Fax +49 (0)8501-8537 Original Message processed by David InfoCenter Subject: Re: Doing chromakey through Runrev (17-Nov-2008 9:47) From: Jacques Hausser <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Hi Jonathan, I'm surprised that nobody answered till now. I did not try chromakeying myself, but I would suggest 1) to sample the color of blue background (perhaps at different places to get an amplitude of variation of the color - it is never absolutely constant) with the mouseColor function. Alternatively, put arbitrary limits at + - n pixels of each channel of the sampled color. 2) to identify pixels of the image of which the color is in these limits 3) to set the corresponding pixels of the alphadata or ot the maskdata of this image to 0. Then the image with be transparent except for what you want to keep 4) to replace the pixels of the imageData of your new background image by the non-transparent pixels of the first image -- or alternatively to put the partially transparent image over the background image, what allow to change the scale, for example, and then to use a snapshot to merge the two images (at screen definition) 6) to use the alphadata or the maskdata of the first image to identify the limits of the incrusted one, and to apply some blurring algorithm to the pixels around this limit. Without that, the limit will appear jaggered. The two images must of course have exactly the same dimensions in pixel rows and columns. Look at the dictionnary for imageData,MaskData and alphaData for details... and tell us about your experiences ! good luck Jacques Le 16 nov. 2008 à 21:59, Jonathan Lynch a écrit : > Does anyone have any suggestions on how to do professional-quality > photographic chromakeying (like blue screen or green screen) with > RunRev? > > -- > Do all things with love > _______________________________________________ > use-revolution mailing list > use-revolution@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-revolution ****************************************** Prof. Jacques Hausser Department of Ecology and Evolution Biophore / Sorge University of Lausanne CH 1015 Lausanne please use my private address: 6 route de Burtigny CH-1269 Bassins tel/fax: ++ 41 22 366 19 40 mobile: ++ 41 79 757 05 24 E-Mail: [EMAIL PROTECTED] ******************************************* _______________________________________________ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution To: use-revolution@lists.runrev.com _______________________________________________ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
