Why we have to rasterize an image? That’s because painting tools and paint filters cannot be applied to layers/ images that contain vector data (e.g. You will want to keep the un-rasterized version of the file archived at all times so that you can make a correction later if necessary. TIP: Rasterization usually reduces the image to one flat layer, thus limiting editing to a minimum. indd files are not intended for distribution to the printer or to such people: you can first export a copy of them. indd) are also combined with raster and vector elements, but. svg files.Įxamples of images that can contain vector elements are. Vector components can be text objects that have not yet been rasterized: letter shapes are vector images.Įxamples of vector images.
Rasterization is usually done for vector graphics or images containing vector components. In the simplest terms, a rasterizing device (example: Photoshop) takes a stream of vertices, converts them into according two-dimensional points, and fills in the interior color of the equivalent, two-dimensional triangles. Triangles are represented by three vertices in 3D space. Polygons are represented as a set of triangles. The most elementary algorithm of rasterizing the 3D scene takes it as a collection of polygons, and then it creates projections on 2D surfaces. Rasterization is the act of converting an image described in a vector format(shapes) into a raster image (pixels or dots) to display on a video device, print it or to save it in a bitmap file format.Īn inverse conversion is used occasionally. So, what does it mean to rasterize an image? So I decided to gather here as many pieces of information about the rasterization as I can! When you upload a photo to the Photoshop and other graphics software, you can’t modify the photo until you rasterize it. I had a general idea of what rasterization is and why we have to do it, but I couldn’t explain it properly.
I managed to answer all questions but… I had trouble with explaining one of them – it was about the image rasterization. She used Photoshop many years ago for fun, so it was more a “reminder” than a “how-to-use-this-software” course. She asked me to explain every tool and option, and after we tested each tool, we decided to create together a sample project.
Example of raster image how to#
One day I was explaining to my co-worker how to use a Photopea software (a free, online version of Photoshop).
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