khm105 Loc: Louisiana

New to having a camera that isn't point and shoot though I'm still using my Canon Rebel T5i on auto. I've been wondering what you guys meant by noise in a picture and finally did a search to find out what it was. This caused me to have another question. Way back years ago I had a Sony camera that stored the pictures on a floppy disk. When I look at them now they look grainy. Is this because of the ISO or because of low MP?

Kathy

GTinSoCal Loc: Palmdale, CA

could be either.

they look different, it is difficult to say without a sample...

Upload an image that we can dissect it. :-)

GT

TucsonCoyote Loc: Tucson AZ

Hey Kathy....a Sony that records on floppy disc (3.5" ).....I still have mine somewhere.....that was a big fat 1MP at max resolution.....you know that is going to look non too detailed.
I don't like the word noise because it is as obnoxious as the people who use it all the time....same with Bokeh ! 8-)

lighthouse Loc: No Fixed Abode

Yes, how dare people talk about photography using photographic terms like noise and bokeh?!?

Rongnongno Loc: FL

You have different type of noises.

Some is correctable because it is predictable (long exposure noise - noise is created by the same pixels. This can be corrected by the camera itself - black frame -)
Another noise is created by under exposure a picture and yet another comes out when using high ISO.
In your case, it was the beginning of digital photography and it is just the sensor weakness.

Noise correction usually involves blurring and mixing the nearby pixels.

I have done some research on noise correction and discovered that you can reduce the influence of hot pixels (red) by selecting them through a series of steps that are sequential and does not involve blurring. Sadly the action I created works only with PS CC and CS4+. I have yet to receive a feedback on that from the folks who has asked to test the action.

I also came to the conclusion that folks do not quite identify what noise is, that was really an eye opener too.

I am currently working on 'cold noise' (blue and green) and that is a harder nut to crack.

The 'white noise' is the easiest to correct. You have the process here or more exactly one of the processes. The likelihood of other folks using a better non destructive (no blur) process is high.

khm105 Loc: Louisiana

My great-nephew who is a senior in high school came across one of those old 3.5" floppy disc and asked his mother what it was. :lol: I asked her if she remembered the 5" floppy disc. She did vaguely. Her mom had one of those old Sony camera's also. After her mom passed my niece found boxes and boxes of pictures and notebooks with camera settings and other info. I explained to what her mom was doing. Things do change.

Kathy

TucsonCoyote Loc: Tucson AZ

I know what you mean, and for old folks like me (and maybe yourself) it all wasn't so long ago!
The one problem I had with that Sony was that it didn't seem to imprint very well because after a year or so, I just could not retrieve the pictures anymore.....lucky I got some on the old PC hard drive and have been transferring them since!

BHC Loc: Strawberry Valley, JF, USA

Does anyone here remember 8" floppies? No protective cover; they looked like big brown dictation discs - and they loaded vertically!

TucsonCoyote Loc: Tucson AZ

Those large floppies were for Industry and Business weren't they.....before that there were those big IBM reels that spun at unreal speeds !? :XD:

BHC Loc: Strawberry Valley, JF, USA

We used them on the desktop computer at the ambulance service in a north county in CA. Each disc contained one patient's complete profile, including A/R. We had to keep track of which ones to load to complete a month's A/R billing cycle, which had what insurance, etc. The county hospitals were all still on paper, so we had to spend hours each month at each hospital transferring data, including deaths, discharges, transfers (e.g.: who was moved from Yreka to Redding, out of area, who moved them, did they survive the transfer, etc.) Just like any company dealing with dozens of jurisdictions, it grew into a nightmare, with one full-time clerk doing nothing except but updates and corrections that the system ran 24/7/365. Now, all the data on all of our discs is kept on 25 dvds - and that's only necessary because there are 2 10X RAIDS and four off-site data centers. Ah, the "good old" days (1982)!

handgunner Loc: Windsor Locks, Connecticut

Kathy ... I still use my T4i. I was going to get a T5i but there really isn't any difference.

Noise? Think back when TV sets had rabbit ears and you couldn't get it to focus no matter how you moved the ears or swithed to a number on the dial that wasn't assigned a station ... that pretty much is noise.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Yup, and the Bernoulli variant, that did have a carrier. How about the IBM 3340 30-30 (60mb) Winchester Drive? Or the first one gigabyte drive that weighed 550 lbs and cost $40,000.

Ah, the good old days . . .

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Might I suggest you look at your DVD collection - bronzing and other "rot" will render those disks unreadable in 7-10 years.

http://en.wikipedia.org/wiki/Disc_rot

boberic Loc: Quiet Corner, Connecticut. Ex long Islander

It's interesting to note that only one recording technology will last if properly stored. All the others-film, tape (of all types) - floppys- Cd. The only one is vinyl. Old records are undergoing a revival. I still have my dad's old 78's from the 40's. Good turntables ( all us old farts still have a record collection) are very expensive. Does any one still have their old 45's (not guns) and that plastic thingys. to play them

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Ah, but vinyl is the only one that degrades with each use - the amount of friction and heat generated at the tip of the needle deforms the vinyl groove - and it needs 12-24 hours to recover. Playing a vinyl record over and over again will make it sound like an old 78 in no time. Or so the wisdom prevailing at the beginning of the digital era stated.

I cannot forget when I read, in the April 1975(?) issue of Absolute Sound, a new technology that used a laser beam to read a plastic disk and play back music. I thought it was an April Fool's joke. :)