How to Convert a Vector Image Into a Bitmap in Illustrator. You can convert a vector image into a bitmap in Adobe Illustrator. Once converted, you can apply various filters and special effects to the image. These instructions apply to Adobe Illustrator 8. Procedures for other versions may vary.
Select the image you want to convert. (Click on the Selection Tool to activate it and then click on the image.)
From the Objects menu, click on Rastorize. A window appears.
Select your color model and resolution.
Click to put a check mark if you want to anti-alias or to make a mask.
Click OK. The image rasterizes (that is, it converts to a bitmap).
Select RGB color model if it is to be a web graphic; select CMYK if it is to be printed. Resolution refers to pixels per inch. The higher the resolution, the better the quality, but the bigger the file size. Anti-aliasing smooths out jagged edges. Masking makes the background transparent.
Once your vector image is converted to a bitmap, you can no longer apply vector tools and commands to it.