This is, however, most often not the case as ReMask does an exceptional job of problem solving. The default on opening the program is that everything is filled in green (keep). Here I have traced around the model and her hair using the blue brush, containing the green within these boundaries. Next I use the red ‘Fill’ option to select the areas to remove. ‘Compute Mask’ calculates the initial extraction and you can select various ways to view the results. You can see from the traditional, layer mask view, that ReMask has done a pretty good job. In the top right hand corner of the window there are options for viewing either a single image, side by side image (which you select your preferred view from the top of each of the 2 images), or 4 images. Screenshot 4 shows the Trimap, the Mask, the Original image and the extracted, Keep image. You can work within any of these views and indeed can switch between them. There is a quicker selection method that actually works very well when you have difficult to define areas such as hair. When you open ReMask, as mentioned above, the default is for the image to be filled in green. BUT it is actually better to fill the image in blue. This will extend the regions that ReMask has to compute but the program is extremely efficient. Make some broad lines and marks in green within the area you want to keep. Make a rough outline in red to show where regions are to be removed. Screenshot 6 shows what a great job ReMask does using this minimal information. So really, there is no need to carefully trace around the edges of everything prior to hitting the Compute button. Here is a closer look at the result in the four view option. When you are working on the extracted, ‘keep’ image it is usually easier to view it against a background. You can add a background of either solid colour (screenshot 8) or an imported image.
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