12/5/2023 0 Comments Blur rectangle pngIf desired, we can specify a color for the outer border: using System.Drawing īmp.ApplyEffect(GaussianBlurEffect.Get(Color.ForestGreen,ģ0, GaussianBlurBorderMode.BorderColor), rect) There is no frame around the blurred part of the image because the algorithm can use the actual pixel colors around the blurred area for the edge pixels. Var rect = new Rectangle(0, 0, bmp.PixelWidth, bmp.PixelHeight) īmp.ApplyEffect(GaussianBlurEffect.Get(30), rect) We can make the outer color white: using System.Drawing īmp.ApplyEffect(GaussianBlurEffect.Get(Color.White, 30)) Īlso, we can blur just a part of the image: using System.Drawing Using var bmp = new GcBitmap("door.jpg") īmp.ApplyEffect(GaussianBlurEffect.Get(30)) Īs you can see, there is a dark frame around the image because the border pixels were mixed with the black outer color. It's easy to do in a C# console project for. If the parameter is not specified, the transparent black color is used.įor example, let's say we want to apply blur to the following image: The outer border color can be passed as the first (optional) parameter to the static Get method. We must somehow extrapolate pixel colors beyond the image edge to apply the algorithm to the pixels at the edge. For pixels at the edge of the image, some of the surrounding pixels do not exist. When a blur effect is applied, the color of each pixel blends with all surrounding pixels at the distance of “radius” (pixels) in X and Y directions. The main one is the radius of the blur, which specifies the standard deviation of the Gaussian distribution as follows: sigma = radius / 3. There are a few parameters in the GaussianBlurEffect.Get method. Public static GaussianBlurEffect Get(Color borderColor, int radius = 9, / The color used to blend with the edge pixels of the image. GaussianBlurBorderMode borderMode = GaussianBlurBorderMode.Default) Public static GaussianBlurEffect Get(int radius = 9, / The mapping mode for the pixels outside of the border. To obtain an instance of the GaussianBlurEffect class, use the static Get method of that class: /// Ready to Get Started? Download GrapeCity Documents for Imaging Today! You can apply it to the entire image or a part of the image using the ApplyEffect method of GcBitmap. The Gaussian blur effect works similarly to other effects. Among other operations, users can apply various effects (grayscale effect, opacity effect, and others) to an image. GcBitmap is a class in namespace that represents an image as a modifiable array of pixels. The visual effect of this blurring technique is a smooth blur resembling that of viewing the image through a translucent screen. Since you are just blurring a rectangle why not simply use a tracker connected to the rectangle mask and a transform node to position them.The Gaussian blur effect is widely used in graphics software to reduce image noise and detail. So if you take a merge node and feed any size of image into the background, that becomes the frame format at that point regardless of any other setting. One question for the experienced users, from what I have seen and read, the frame size is taken from whatever background is in use at any point in the comp. I'm very much a beginner with Fusion myself but I did get a good play around with the trackers recently and thought I had got most of the important features in my head. If I'm not mistaken wuast94 simply wanted to blur the license plate of the car but the thread seemed to get over complicated. If you have a chain of masks, the entire chain takes its resolution from the first one in the chain. So if you get a sequence back from the render farm that looked fine on your screen, but all the roto is wrong or missing in the result, set those mask dimensions yourself. That usually only happens in non-interactive sessions. It should therefore be the default format of the project, which might differ from the footage, leading to an incorrect calculation of the transformation.Īnother time the auto-sizing might fail is if you're rendering with Simultaneous Branching turned on, in which case sometimes the mask will be render before the tool downstream has finished determining its own size, and it will take the default dimensions. In this case, the Rectangle is plugged into the main Input of the Planar Transform, so the size of the Planar Transform's raster is determined by the Rectangle itself. It can only do that when the mask (or chain of masks) is plugged directly into an EffectMask input of a tool that will otherwise report its own size. To expand on that a little, for the benefit of those who aren't used to some of Fusion's foibles: Sander de Regt wrote:(it should take its size from the image its masking, but it doesn't always do that).
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