Image ConvertersLesson 237Free preview
GIF to JPG
This lesson is part of Web Developer Tools · All levels
Summary
GIF to JPG conversion is useful when the destination system only accepts JPEG files, such as application forms or print services. JPG uses very efficient lossy compression for photos, but it doesn't have a transparency channel. Therefore, the transparent area on a GIF must be filled with solid color, usually white, before it is stored. Choose a reasonable quality so that the details remain visible without causing the file to swell.
Key points
- JPG uses block-based lossy compression transformation and is suitable for photo
- JPG does not support transparency, so transparent backgrounds need to be colored solidly
- GIF animation is missing and only one frame is saved
- Quality 8090 is usually sufficient; too low a value causes the block artifact
- Repeated compression on JPG stacks artifacts, so keep them always from the original source.
Full lesson
Code examples and quizzes
Full lessons, code examples, and quizzes are available to subscribers. 5 questions.