What is the difference between lossy and lossless compression?

Related questions

1. What type of compression is PDF?
2. What are the different compression techniques?
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Tags

1. #picture
2. #lossless
3. #means
4. #original
5. #removes
6. #quality
7. #remains
8. #lossy
9. #compression
10. #compressed
11. #decompressed
12. #worse
13. #permanently