What is meta? ×
Meta Stack Exchange is where users like you discuss bugs, features, and support issues that affect the software powering all 127 Stack Exchange communities.

This question already has an answer here:

I can't seem to post the question below. What is wrong with it?

Title: What is wrong with this jpeg based image compression?

As an assignment i wrote a simple jpg like image compression. But after i encode it ,and decode it the image changes drasticaly. The mDCT() and mIDCT() do the discrete cosine transform and the invers.

For 8-by-8 matrixes i tested them and seem to be ok. But when i use them on a test image i cant figure out whats wrong. The file's can be found here. Link to files

Tags:

share|improve this question

marked as duplicate by gnat, Toon Krijthe, ben is uǝq backwards, ɥʇǝS, Diago Apr 29 '13 at 17:41

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

5  
Capitalize your I's? Add some code? –  Richard J. Ross III Apr 29 '13 at 13:46
    
You might want to run that through a spell checker. And if you talk about yourself, write "I", not "i". And don't merely link to files. Include the relevant code. –  Bart Apr 29 '13 at 13:46
3  
They recently tweaked the quality filter threshhold for blocking questions. I know it puts a lot of weight on spelling, grammar, and punctuation, and probably takes into account the lack of code in your question too, so try to fix the grammar and punctuation of your sentences, and place the relevant code in your question itself instead of using an external link for it. –  Rachel Apr 29 '13 at 13:47
2  
add comment

1 Answer

So, one more time this, ey? Let's go through it...

What is wrong with this jpeg based image compression?

That's a bad title, it doesn't say anything about the question.

As an assignment i wrote a simple jpg like image compression. But after i encode it ,and decode it the image changes drasticaly. The mDCT() and mIDCT() do the discrete cosine transform and the invers.

English uses the word I to refer to one self, please use your shift key accordingly. Also, the English language uses a space after a comma, not before one.

For 8-by-8 matrixes i tested them and seem to be ok. But when i use them on a test image i cant figure out whats wrong. The file's can be found here. Link to files

Seriously? You expect me to download a rar?! All questions need to be self-contained and stand on their own. This is not acceptable.

share|improve this answer
5  
+1 for the answer, +100 if I could for You expect me to download a rar?!. –  Matt Apr 29 '13 at 13:57
add comment

Not the answer you're looking for? Browse other questions tagged .