Photoshop first appeared in 1987 by Thomas knoll and impressed his brother John knoll with this great work and helped him remake it and named it “IMG Pro”, and then they named it Photoshop, Adobe bought a license to distribute the program, and the first version was launched in 1990 on MACs. and now it is the best program for editing images that can also be used in drawing and sketching easily and in high quality.
Its uses also help web designers to design web interfaces and backgrounds. And designing billboards for example advertising posters, banners, videos and making advertisements of all kinds, and designing personal cards and professional logos.
It came from the verb Illustrate, in the sense that it is the preferred drawing program of designers specialized in the design of vector artworks , and includes many advantages that have developed the design of logos and illustrations, its used in motion graphics also and has many new and improved features, including the possibility of multiple drawing boards within a single file, which is very accurate in the drawing where any vector element can be enlarged to imaginary sizes without being affected by zoom and its edges are always smooth and precise .
The pixel is the images measurement unit, and it is the smallest element in a digital image and is in the form of a point or a small rectangle i.e. a group of pixels (in a two-dimensional surface)
The difference between Vector and Raster
Raster: is a shape or element consisting of a number of pixels that are charged at the purity of the image and are influenced by zoom.
EX: PSD, TIFF, JPEG, PNG, BMP, …
Vector: is a shape or element consisting of lines and points called ANCHOR POINT with smooth and precise edges and is not affected by zoom because of some mathematical calculations.
EX: AI, EPS, PDF, CDR, SVG, …