![]() Its illustration is defined by information such as the position of the centre, diameter and colour. For example, in a vector graphic, a circle does not consist of individual pixels aligned with the grid. ![]() These parameters define exactly the objects that make up an image or graphic. starting point, length, direction, colour etc. The shapes are described by certain parameters, e.g. Vector graphics consist of geometric shapes such as lines, curves, circles, and polygons. Common file formats for raster images are. For editing, raster-based programs such as Adobe Photoshop are necessary. Monitors, TV screens and digital cameras also use them. Raster images are very common in everyday life. Raster images are ideal for complex, highly detailed and true-colour images and graphics with lots of information, such as photographs. With professional work and precision, however, the highest quality can be achieved as well. If raster images are subsequently converted into vector graphics, this often leads to reduced quality. The higher the quality of an image, the larger also the file size and demand of storage space. Contours and details blur, the image looks pixelated and colour errors occur. If a raster images is greatly enlarge, the raster arrangement of the pixels becomes more apparent. In addition, raster graphics are very widespread and can be saved for divers applications in various, program-independent file formats.Ī major disadvantage of raster images is that they cannot be scaled arbitrarily, especially enlarged. Each pixel can be edited and adjusted individually. The more pixels, the higher the resolution and quality. The quality is highly dependent on the resolution. The biggest advantage of raster images is their richness in details and colour gradations and therefore high quality. For more information about PPI, DPI, resolution and the connection with image quality, refer to our blog post “PPI, DPI? We have the resolution”. DPI is a resolution measure from the printing technique, but is often used synonymously for PPI. PPI describes the relative resolution of an image, the pixel density, so to speak. Often mentioned in the context of pixels are PPI (pixels per Inch) and DPI (dots per inch). The more pixels there are in an image, the higher the quality and vice versa. The pixels contain different colour information and together they form, for example, a colourful image. Raster images or raster graphics consist of individual pixels arranged in a grid. What are the differences and when to use what? We have answers to the most important questions.
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