use of rle in compression

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Jitesh Bhanushali
Jitesh Bhanushali on 29 Mar 2014
Answered: Said BOUREZG on 28 Feb 2015
is use of rle is responsible for compressing the image ???

Answers (3)

Jan
Jan on 21 Sep 2014
It depends on the compression, of course. RLE is applied in JPEG compression and as the name says already in images stored in the .rle format, as e.g. the startup screen of Windows (see Wiki: RLE).
It would be an efficient idea to ask your favorite internet search engine about "image rle" to find out more details by your own.

Hassan
Hassan on 21 Sep 2014
of course just think about the pixel's value as a character or number

Said BOUREZG
Said BOUREZG on 28 Feb 2015
Yes, it's responsible but not all time. for example here: X= 200 200 200 200 200 200 8 11 11 11 11 11 Y=rle(X) >> Y=200 6 8 1 11 5 Here CR= length(X)/length(Y) >>CR=2 %here we have a compression with compression ratio equal 2. but if we try to compress Y with rle we will have: F=rle(Y) >> F=200 1 6 1 8 1 1 1 11 1 5 1 So we will obtain CR=0.5 here we don't have a compression.

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