PDA

View Full Version : JPG Compression ratios



Anonymous
04-22-2002, 12:32 AM
Seeing that the order thread proved your figures wrong are you going to fix it at all?
Or are you going to use the typical; Tweaktown makes mistakes like everyone else just we don't correct them.

Mr.Tweak
04-22-2002, 12:41 AM
Why don't you have a wonderful attitude - You won't even reveal your true identify by registering, but nevertheless I have a fair idea who you are - And if I am right, I do wonder sometimes about people who hold grudges.

In answering your question, I actually had a bit of a look at PSP and it appears to be it does use ratios, not percentages. Like I said in the other thread, I didn't perform any calculations myself, but went on what PSP reported. It's getting late now, but in the morning I'll study it more and if your theory is indeed correct, I will update the article.

Now if you're quite finished, I think your opinion has been well and truly made.

Anonymous
04-22-2002, 12:51 AM
So lets see, other than "not" saying you will be correcting the errors which have shown in the guide (Severe error at that) you know assume its a grudge.

I think its your attitude which needs to be checked.

Lets review shall we? I point out some errors in the guide, including the extremely serious & misleading compression ratio. You sit here, close threads & say "I'm only human", though rather than learning from your mistakes like most humans you just leave it as is then go ahead & make more of them.

As regards your looking at PSP its uses %age ratios. The slider on the bottom shows this also, at 25 the blue bar is 1/4 way to the right. At 50 it would be 1/2, etc. It's percentage, its obvious. Email the developers if you want to, they'll agree with me. The calculations further back it up.

It's no "theory".

Mr.Tweak
04-22-2002, 12:56 AM
As I said, I'll look into in the morning.

Anonymous
04-22-2002, 09:11 PM
&

Beefy
04-22-2002, 09:40 PM
Ummm... i'd like to jump in here if I may..

Now, I can't really say I knew that much about jpeg files.. Sure, I could rip apart a PC and put it together with my eyes closed, but just cos I've got a fair knowledge of the insides of a PC, doesn't mean I know exactly how jpegs work.

Perhaps it wasn't the best idea to put this kind of article on Slashdot.. It's true that /. is for the more advanced users / techs around the world. But I noticed that you were nice enough to give us a link to the ./ post where the article is mentioned.. Aside from all the sarcastic comments that a lot of people made, there are actually a few in there that seem genuine.

I don't see why you are putting Tweak down so much.. He's just been trying to help people from entering a situation which he has recently faced. I'll be the first to admit it's not the most in depth article i've seen him write, but it still brings the attention to the amount of traffic that can be saved by using varying amounts of compression on pictures. So he got a few little bits of terminology wrong.. At least he's out there trying to help people.

Now it's all well and good to sit there as an Unregistered user and post what you will. It shows us how weak your character really is. I could understand it if you came in here as a registered user and said these things. Maybe then we'd give you the time of day and be reasonable about this.

But no.. you've decided to basically launch on the offensive straight away and basically be a pain to everyone around here. Notice how other people are posting helpful and useful messages, yet you come in here and just flame away? OK, so maybe your first post was trying, in some kind of way, to be helpful... but really, repeatedly coming in and abusing Tweak for what he's done isn't really the way to do it..... Very little character indeed...

Now, i'm sure you'll come straight back at this post with some very nice retort, but I honestly couldn't care less. Instead of arguing with people, why don't you just keep your comments to yourself... they aren't helping anyone around here. If you wanna take this up with me personally, feel free. my email address is beefy_8@hotmail.com.. I look forward to hearing what you could possibly come up with to offend me further...

:hmph:

Andy
04-22-2002, 11:43 PM
well said beefy :thumb:

Anonymous
04-23-2002, 12:19 AM
Now it's all well and good to sit there as an Unregistered user and post what you will. It shows us how weak your character really is. I could understand it if you came in here as a registered user and said these things. Maybe then we'd give you the time of day and be reasonable about this.
I don't feel the need to register. I'm only here to see the errors get sorted. I have zero wish to stick around beyond that.

As for "my character", you're right. I should rephrase. Well done Tweak!! Other than the fact you at no point cover that its JPEG & the ratios you use & thus conclusions you come to are WRONG, that & JPEGs have been around for years its fine.
Should I keep up this level of sarcasm?

Why don't you stop trying to defend Wilmot. He is wrong, I've proven it to be wrong. I don't care what you think of my tone in the matter. Perhaps you should be more reasonable & just accept its wrong & edit it.

Anonymous
04-23-2002, 07:41 AM
Well, I guess this kinda says it all. 2 days later & still the errors are up there.
Kinda makes you wonder what else TTown doesn't bother fixing, even when the errors are pointed out publically, which is usually the best way to get people to fix things (As with Microsoft for example, heh).

In summary why don't you try better inform your readers by actually correcting mistakes rather than leaving them up. Perhaps this is why you "left" VIA. They probably don't keep on those who contually make mistakes but don't learn how to stop making them.

Mr.Tweak
04-23-2002, 08:23 AM
I suppose you expect me to get really angry and write something really defensive here? You're games don't work Thomas, go work on 3DSpotlight.

Mr.Tweak
04-23-2002, 08:28 AM
Perhaps this is why you "left" VIA.

I resigned from my position from VIA, if you want to confirm this you can email john.gatt@viaarena.com, fiona.gatt@viaarena.com or richard.brown@via.com.tw.

Beefy
04-23-2002, 08:31 AM
I don't feel the need to register. I'm only here to see the errors get sorted. I have zero wish to stick around beyond that.

As for "my character", you're right. I should rephrase. Well done Tweak!! Other than the fact you at no point cover that its JPEG & the ratios you use & thus conclusions you come to are WRONG, that & JPEGs have been around for years its fine.
Should I keep up this level of sarcasm?

Why don't you stop trying to defend Wilmot. He is wrong, I've proven it to be wrong. I don't care what you think of my tone in the matter. Perhaps you should be more reasonable & just accept its wrong & edit it.

Well, fair enough that you don't want to register. I wouldn't want anyone knowing who I was if I was writing the stuff you'd been writing.

I fail to see why you keep trying to grind Tweak's nose in it. You're right, he did make some errors in the article. He even admitted in the other thread he made the mistakes. So he HAS accepted that he was wrong. Notice how nobody else is flogging this like a dead horse but you? Most people have the decency to let it slide. As far as I know, Tweak is actually looking to improve the article as we speak, adding extra items to make it more applicable to everyone.


Well, I guess this kinda says it all. 2 days later & still the errors are up there.
Kinda makes you wonder what else TTown doesn't bother fixing, even when the errors are pointed out publically, which is usually the best way to get people to fix things (As with Microsoft for example, heh).

In summary why don't you try better inform your readers by actually correcting mistakes rather than leaving them up. Perhaps this is why you "left" VIA. They probably don't keep on those who contually make mistakes but don't learn how to stop making them.

Well, how nice of you to give us a running tally of how long the page has been up. It's good to see you've got nothing better to do with your time. So nice of you to actually help us. Like I said earlier, this is actually being worked on.

Oh, and as for that VIA comment, perhaps you should actually get YOUR facts straight. You are definitely wrong there. I was corresponding to John Gatt at VIA not long after Tweak left, and they were honestly disappointed that HE chose to leave...

I also like the fact that since Tweak made one mistake, you suddenly seem to think he 'contually' makes mistakes. This shows that you honestly couldn't care less about the article, you are just there to make snide comments.

Anyways, just to add further insult to injury.. You are wrong. Plain and simple. I noticed in your other post that you mentioned about the difference in the JPEG quality, how one was 61.3k, and the other was 16.7k. Very good, you managed to get the figures right.. Then you went on to say how your math skills showed that this was infact 3.7:1 instead of 25:1, which was stated by Tweak.

Now, if you did have a clue about JPEG compression, you'd know that the compression ratio in fact doesn't not always directly correlate to the size of the file. If you have a picture with a lot of the same color in it, then the file size is going to be much smaller, compared to one with lots of various colours. So, if I made a big, black picture and saved it as a JPEG, it would be basically the same size, no matter which compression I used. The Compression Ratio is basically just a quality scale from 1 to 100. It's not really a ratio as such.

So... next time.. If you feel that you MUST slam people's faces into the ground with your 'fact' and 'proof'.. make sure you get it right.

fozTor
04-23-2002, 04:04 PM
Seriously...go and run your lousy site at www.3dspotlight.com and stop playing out your crap here. YOUVE MADE YOUR POINT NOW GET THE HELL LOST ALREADY. Its people like u that give the Net a bad name.

Get on with your pathetic attempt at a site and leave TweakTown alone, right. What would you do if someone came to your site and started posting crap on your content all over your forums and he didn't have the balls to register?

I would perosnally smack the crap outta him, but you're in Ireland so that isn't possible. Get a Fu@@en life, seriously. If you can't say something nice then shut yer farken mouth. Right.

Anonymous
04-23-2002, 09:13 PM
Who?

Beefy
04-23-2002, 09:47 PM
looks like our mystery guest is a little scared.. We didn't get a big long rant this time. Must realise how wrong he is..

Grim Reaper
04-23-2002, 10:21 PM
seems to me somebody has been proven wrong here Thomas (you :p)...

why is it that i get the feeling your jealous that cameron has built from the ground a very successful tech site?

please, i think the best thing you can possibly do right now is crawl back to your lower leveled tech site and not return here, cameron has written a nice, simple article, a few errors yes and has admitted to them...

as beefy said, no rants/flames...maybe you realise finally your in over your head...

btw, anybody that replies to this, please don't flame Thomas (altho we'd love to) because all your really doing is stooping to his level...

:thumbs do

Olie
04-23-2002, 10:41 PM
damn it al teh action is gone
oh well looks liek we won :bounce:

Anonymous
04-24-2002, 02:09 AM
btw, anybody that replies to this, please don't flame Thomas (altho we'd love to) because all your really doing is stooping to his level...

:thumbs do
Well, no, just I'm errr, not really this guy who you seem to think I am.

Beefy
04-24-2002, 07:36 AM
well if not then why are you hiding yourself? :rolleyes2

hbidad
04-24-2002, 11:55 AM
Ok, what is your Reviews, Articles, HOW-To's and news compared as a ratio from Accurate to inaccurate? Starting frome day one? I highly doubt that you have created enough articles to even fall in to a ratio catagory. Maybe I am wrong.


This site must have done some good some where or you wouldn't be here now..... Where are you banners at? Never seen them around...>Mr. Tweak must be doing something right!

Anonymous
04-24-2002, 09:06 PM
Ok, what is your Reviews, Articles, HOW-To's and news compared as a ratio from Accurate to inaccurate? Starting frome day one? I highly doubt that you have created enough articles to even fall in to a ratio catagory. Maybe I am wrong.


This site must have done some good some where or you wouldn't be here now..... Where are you banners at? Never seen them around...>Mr. Tweak must be doing something right!
I saw link on /., simple. saw errors, posted them.

"Now, if you did have a clue about JPEG compression, you'd know that the compression ratio in fact doesn't not always directly correlate to the size of the file"

Also note Beefy said this not the writer. So perhaps if Cam had covered this properly I wouldn't be whinging here. Bye

Beefy
04-24-2002, 09:35 PM
Still, I don't see any comment / apology from you about yourself being wrong.. so you are basically doin the same thing as Cam here.... Even though Cam isn't exactly wrong to begin with. He states the software he is using (PSP) and then states how it works.. As we showed that it's not an exact ratio, I don't see what is really wrong with that now..

Beefy
04-26-2002, 08:48 AM
Well, I guess this kinda says it all. 2 days later & still he hasn't replied.
Kinda makes you wonder what else our Unregistered user doesn't bother fixing, even when the errors are pointed out publically, which is usually the best way to get people to fix things (As with Microsoft for example, heh).

In summary why don't you try better inform other forum readers by actually correcting / apologising for mistakes rather than leaving them. Perhaps this is why you "left" the forums. They probably don't like those who continually make mistakes but don't learn how to be man enough to accept when they are wrong.

Wiggo
04-26-2002, 09:25 AM
Maybe he got sick of talkin' to ya. ;)
:cheers:

Beefy
04-26-2002, 09:28 AM
maybe he realised what a total idiot he made of himself and is too ashamed to come back..

Albinus
05-19-2002, 12:48 PM
This brought up a little thing I have found...

For Windows screenshots, PNG format is a nice way to do things, it is a newer form of GIF and looks damn nice (not limited to 256 colours). Here's a screenshot in PNG format (only about 55KB):

Albinus
05-19-2002, 12:55 PM
And the same screenshot in crappy JPG quality (and over DOUBLE the size) :eek: