First of all, the software for editing them is completely different. Ai files are files edited and generated by illetrasion software, mainly vector graphics files, which can be infinitely enlarged or reduced in theory. Psd file is a file edited and generated by photoshop software, mainly a bitmap image. Enlarging or reducing them will affect their clarity.
PS？ Used to process bitmap images such as photos, AI? Mainly used to draw vector diagrams. The biggest difference is that pixels (mosaics) will appear after the bitmap processed by PS is enlarged, and the vector map can be clearly seen no matter how many times it is enlarged.
Different principles
1. Since PS is based on pixel editing, AI is based on editing objects. Therefore, artificial intelligence editing and typesetting operations are more efficient.
2, the same line drawing, PS is to generate a number of pixel points, while AI is to determine the position with points and point coordinates. Therefore, the memory occupation of the produced pictures is small (the requirements for computers are not high), and they can be infinitely enlarged without distortion.
3, AI is not as powerful as PS in effect editing, such as adding shadows, which requires a lot of operations. At the same time, AI lacks tools for color and tone editing.
Different functions
AI is mainly used for drawing graphics, and PS is mainly used for processing photos and images.
Different uses
AI is mainly used for enterprise VI(LOGO) production, vector illustration drawing and so on, because vector graphics have advantages in this respect. AI is also good at text typesetting, and many manuals, leaflets and posters are made through AI. Although AI can edit the pixel map in a certain sense, its editing ability is far less than that of PS.
PS is good at retouching and painting, because photos, pictures and so on are pixel maps. PS is mainly used for the modification and editing of pictures, the editing and production of materials and, of course, some typesetting work. Although PS also has some vector editing functions, it is not as convenient to use as AI.
A combination of the two.
1. In order to draw the outline of the picture to complete the vector diagram, many designers design sketches on paper, then scan them into Photoshop, clean them up, draw the outline in Illustrator, and add colors, words and various effects.
2. Add text content. Although you can edit and modify text in Photoshop, this is limited. In Photoshop? This has been greatly improved in version 6.0. But for designers, the text editing of general pictures can't be done in Photoshop, unless it is to do some special font effects, which is the strength of Photoshop. Don't edit the text in Photoshop, because the text in Photoshop looks rough, while the text in Illustrator prints smoothly. Putting pictures in Illustrator for text typesetting is a common practice of many designers.
AI is a vector graph; PSD consists of pixels.