12 Nov Vector or raster
Pixels are colored dots, that combined form a larger image or a frame of a captured video. A photo can be made up of millions of pixels, depending on the size of the image. When you zoom the bitmap, that clear image begins to blur, as pixels become more visible. When you resize a bitmap picture that was made in lower resolution, those pixels get bigger and pixture becomes distorted.
A bitmap image takes up a lot of space, as each pixel is stored in the file. The bitmap files are usually uncompressed such as .tiff files or compressed files like .jpg, where some information gets lost. An bitmap image of 5000 x 3000 pixels in .tiff would range from 60 mb upwards, while an compressed .jpg would be around 5 mb.
The picture size is enough for a high-quality print on A4 at 600 dpi, normal printing quality at 300 dpi for sizes up to A2, or even large outdoor prints cca. 14 x 10 m at 15 dpi.
Dpi stands for dots per inch, which is the quantity of pixels per inch. You need a bigger quantity of pixels for magazines and smaller printing materials which you look up close. For the outdoor posters you need smaller quantity as you look at them from far and it also means less ink for the printery.
You can use a free software such as Gimp to create your drawings https://www.gimp.org/.
A vector image is based on a mathematical description of objects and colors. Vectors are primarily used in graphics, but for the demands of web design, animations can be crated with vectors as well. When you zoom into a vector or resize it, the picture remains always clear and sharp.
Vector files are usualy very small and sum up to a few kb. Vector files are recognized by the filey type, .pdf, .ai, .cdr, .svg., .json. There is no limitation for the resizing of the vector and the quality remains always the same.
You can use a free software such as Inkscape to create your vector drawings https://inkscape.org/.
• Vector and Raster