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Image Compression Issue

21 replies · 6,263 views · Started 04 April 2007

I got an N95 the other day, love it even the battery life seems pretty decent for what i'm using it for.

My only issue with the phone, is when taking photos! Nokia have made it so whenever you take a picture the picture is compressed to save space reducing the quality dramatically, pictures are at a max 700kb when they should be nearing 1.5mb - 3mb, fair enough the phone only has 160mb but with a 2gb thats loads of photos you can take. You get a better picture if you take a video then screenshot it :con? The pictures are compressed by over 70% roughly, i hate the fact you cant choose the quality from high - low is just aset a the low the nokia have put on their with no option to change!

Anyone know if nokia plan to add in the firmware update the option to choose the image quality? or anyone know how or if you can install an application on the phone remove this compression that is on all photos.
If so then this phone would then be truely great, my K800 takes better photos.

thanks

a friend has a k800 and comparing the 2 on the pc the k800 does not take better pictures although at night it has the best flash.

i've yet to get anything higher than 700kb, any idea why this is, i still dont think the picture quality is as good, the flash is pants tho. i have the settings set to 5MP in the image settings, any ideas guys?

jeffers38 wrote:the quality dramatically, pictures are at a max 700kb when they should be nearing 1.5mb - 3mb, fair enough the phone only has 160mb but with a 2gb thats loads of photos you can take.

Many of my pics are up to 1.5MB - a lot depends on subject matter. To be honest, any JPG compression issues are dwarfed by the over-zealous sharpening...

Steve

I've been getting the same, 700kb images on a 5MPix camera, if you view the photos on a PC at full res they are blocky as hell!

This compression really lets the camera on this phone down. Nokia / symbian need to sort this out.

Yes, maybe if you lower the settings, but what we are trying to say here is you cannot change the settings. The compression is fixed!

I've uploaded a section of photo taken in daylight, inside at full resolution on the N95.

Now you can't tell me that this is acceptable quality of a 5MP camera?

Attachments: 06042007006.jpg

mdj1 wrote:Yes, maybe if you lower the settings, but what we are trying to say here is you cannot change the settings. The compression is fixed!

I've uploaded a section of photo taken in daylight, inside at full resolution on the N95.

Now you can't tell me that this is acceptable quality of a 5MP camera?

Shocking, my 3650 would have made a mess of the photo in a similar way.

Whilst i've seen some really good photos on the N95 i've also seen some really poor ones, so poor in fact I need to double check it was actually taken on that phone. At the time it was announced it was going to have a 5mp camera I suspected it was just to trick people who think the higher pixel count the better, sadly it's starting to become obvious I was correct in my cynical assumption. The leyman hasn't a clue about what CCD and CMOS means, shame as I think otherwise they wouldn't get away with it.

Looks like SE can still lay claim to making phones that take the best photos in the business then.

mdj1 wrote:Yes, maybe if you lower the settings, but what we are trying to say here is you cannot change the settings. The compression is fixed!

I've uploaded a section of photo taken in daylight, inside at full resolution on the N95.

Now you can't tell me that this is acceptable quality of a 5MP camera?

That's NOT a 5 MP photo.

It's 725 X 560 pixels. 725 X 560 does not equal 5,000,000.

A 5 MP photo would be 2592 x 1944

This is not a compression issue, it's simply just not taking a 5MP photo.

Either A) You camera is not set to 5MP. or B) If you have set it to 5MP, then the phone is faulty and needs repairing/replacing.

I doubt you are stupid enough to post all that without checking the settings properly, so get your N95 retuned to where ever you got it ASAP. It's broken.

If you read my post it says a section of a full size photo, thats why its not full size.

Im checking setting again now as i write this, ok here goes....

camera set at 5MP (max setting) I have just checked.

Ive uploaded a section of another full size photo again, making sure that the green focus lock comes on before taking it. The full photo size is 657kb

This can't be right.

Can someone else post some sections of photo?

Remember, when cropping and exporting the photo that your jpg is 100% quality otherwise it will be reduced again.

Attachments: 10042007007.jpg

Please attach a full sized photo then so we can compare with our own.

If i zoom right into my 1MB size+ photos a lot, that's what i see.

Welcome to the world of CMOS and camera's that don't have one for the most fundamental components that make a camera a camera - a proper mechanical shutter.

Yep, if you are using digital zoom, your pictures will be smaller.. because it contains less information than a non-zoomed picture...

But even if you are not using digital zoom, then the N95 pictures do seem quite small. I've had similar sized small picture e.g. ~600-700k on my N95.

Most standalone digi cameras have a resolution and a compression setting, it seems N95 is stuck on the lowest quality (smallest size) compression setting.

I thought the N95 had a mechanical shutter? or is it just for show?

PS, had the battery changed on mine today, lasting 24 - 36 hours on standby with NOTHING turned on.

mdj1 wrote:I thought the N95 had a mechanical shutter? or is it just for show?

PS, had the battery changed on mine today, lasting 24 - 36 hours on standby with NOTHING turned on.

It's got a mechanical lens guard.... AND a mechanical shutter.

24 hours + of standby with everything off isn't right. My guess is that you've installed something running in the background or are at the limit of a 3G of GSM cell or something like that.

With light-ish use (<10 mins calls a day, only a couple of photos, <30 mins web browsing), I've been getting 48 hours from one battery charge on my N95.

Steve

One thing I've noticed is the "sharpening" feature can give you like a colour bleeding effect or exageration of areas of high-contrast. This is the bottom option on the tool bar on the right hand side when you're in the Camera, still capture mode.

It seems different 'scenes' like Auto, Close-up etc have different default options for this, to enhance the standard use-case. However, it does appear to give a loss of detail in some pictures. If you try taking a picture of some text with hard/normal/soft sharpness, and compare the results you should see some difference.

You can create a user-scene with a specific sharpness and just use that instead of some of the other presets to see what gets you the best results. I'd spotted this myself in testing, and later saw confirmation on here (tip 19): http://3lib.ukonline.co.uk/tipsn95.htm

Hope this helps, but dont give up on what is a truly kick-ass phone. 😊

RichardL wrote:Yep, if you are using digital zoom, your pictures will be smaller.. because it contains less information than a non-zoomed picture...

But even if you are not using digital zoom, then the N95 pictures do seem quite small. I've had similar sized small picture e.g. ~600-700k on my N95.

Most standalone digi cameras have a resolution and a compression setting, it seems N95 is stuck on the lowest quality (smallest size) compression setting.

Did some testing over the weekend. The N95 does apply some compression to the photos, but not as much as some people seem to thinks. The file sizes produced by the N95 is about the same as setting a jpeg quality setting of 90%.

Same compression problem up here! :con?

Check out this open dir (pics taken with my bugged N95): http://www.online24.nl/N95/.

The biggest file (1,05MB: http://www.online24.nl/N95/07072007203.jpg) is far out the sharpest image taken from ~ 5 meters. I don't know why this picture is sharper and why the filesize is bigger...

Check out the images of the car...big distance: unsharp picture!
@ ~ 1m - best for my buggy N95
http://www.online24.nl/N95/07072007207.jpg
@ ~ 4m -
http://www.online24.nl/N95/07072007208.jpg
@ ~ 10m - worst image ever taken with my N95!
http://www.online24.nl/N95/07072007209.jpg

One month ago I left my N95 at a NSP in Heerenveen (The Netherlands) for repair. 3 weeks later they called me to say I would get a new one from Nokia! Nono, after one month (yesterday) I received my old buggy Nokia... Nothing fixed! And it was used by a Polish dude. My whole phonebook spammed with Polish phone numbers (+48). My batterycover is also gone! Oh.. and my N95 is never been to Nokia!! (my IMEI and serial key weren't found in the database)

What to do with this buggy N95...? And why are most images 70&#37; compressed and some of them less than 30%? After my holiday I'm gonna complain for this worst service ever had from a NSP!!

Any tips? thanks in advance..

(sorry for my bad english 😉)