图片基本知识（Basic knowledge.）.docVIP

图片基本知识（Basic knowledge.） A, [picture] basic knowledge of commonly used image formats: PNG, JPG, GIF, PDF Common image formats: PNG, JPG, GIF, PDF PNG: good image lossless compression, background or any color can be transparent. Do not support the application of animation. JPG: the color is rich, using JPG format file size will be smaller. Does not support transparent image, does not support the application of animation. GIF: suitable for simple color pictures, background or any color can be transparent, can be made by frame animation. PDF: support vector graphics can zoom, print, Adobe Acrobat Professional and commonly used drawing software like Photoshop, Illustrator can edit PDF format. Two, a reasonable set of basic knowledge] [picture picture resolution Resolution refers to the number of pixels per unit length of print shows, usually expressed in pixels per inch. High resolution images than the same size of low resolution images and clear. Image resolution: ordinary print: 300 pixels / inch PVC card: 600 pixels / inch Image resolution: 72 pixels / inch network Three, [picture] has basic knowledge of vector graphics Vector graphics in the mathematical way of recording, and is independent of resolution, no zoom distortion, a smaller file. Vector diagram in the PDF format print is very convenient, for example A4 PDF vector images, print A3, amplification of A2 or larger size is still clear. The general picture is called bitmap, with a square image combination picture point. The more number of image quality is higher, the greater the file. Four, [picture] basic knowledge is selected according to use color mode mapping Edit pictures to choose according to the purposes of color mode: For color image printing: CMKY model Used to print black and white pictures: gray mode For color image network: RGB model Five, [picture] basic knowledge of commonly used software programs and edit pictures 1, the system comes with drawing program. Click on the lower left corner of the sc