What are the classifications of libraries in the development system?

Classification in the development system can be classified from different angles, such as 1. According to the picture content: natural scenery, people, architecture, food, animals and so on. 2. According to the screen style: cartoon, modern, retro, hand-painted and so on. 3. According to the color of the picture: black and white, color, monochrome, etc. 4. According to the image format: PNG, JPEG, GIF, etc. 5. According to the purpose of the picture: business, education, personal, social and so on. 6. By screen resolution: HD, SD, Ultra HD, etc. 7. Photographic equipment: mobile phone shooting, SLR shooting, drone shooting, etc. Wait a minute. Different people will choose different classification methods according to the actual situation.