Saving Images

I am using an Olympus c2100 and my images are 1200x1600 HQ jpegs.

It is my understanding that everytime you open and close jpegs the image losses some of its quality. I am currently changing them to 4x5.33 inch images at 150 resolution as a tif file. I save the original jpegs on a CDR.

What do others do?

The jpeg images only lose quality if you resave as jpeg in an editing program. If you just copy them onto cdr, the image will stay exactly the same. If you just open them to look at in an editing program, they will stay the same.

What I do is save the jpeg right away as tif, and work with it from there. Each time you save on this tif image, there is no loss in quality.

B A H

Charles Tarver said:

I am using an Olympus c2100 and my images are 1200x1600 HQ jpegs.

It is my understanding that everytime you open and close jpegs the
image losses some of its quality. I am currently changing them to
4x5.33 inch images at 150 resolution as a tif file. I save the
original jpegs on a CDR.

What do others do?

Click to expand...

-- http://www.pbase.com/gdguidehttp://adigitaldreamer.com

Tell me please....if it comes from the camera as a jpeg, do you change it to a tiff????? Or do you have to be shooting in tiff? I have been shooting in SHQ with my camera.
Thanks......
--LucyC3020Zpbase supporter

Lucy said:

Tell me please....if it comes from the camera as a jpeg, do you
change it to a tiff????? Or do you have to be shooting in tiff? I
have been shooting in SHQ with my camera.
Thanks......

--
Lucy
C3020Z
pbase supporter

Click to expand...

The reason to save a JPEG from the camera as a TIFF file via your photo editor is that no FURTHER compression is being incurred other than the original compression done in the camera.

I save them a few ways

I save the original out-of -camera image on CD-R
I save the processed image in my editors native format
I save a bitmap image I use for printing
I save a scaled jpeg I use for posting to the internet

All of these eventually get backed up to CD-ROM--richc-700, d-510 http://www.pbase.com/iceninevt

Just a reminder to back up to CD-R regularly - my daughter's laptop crashed yesterday (won't boot up). If its the hard drive, it will have to be replaced and everything on it will likely be lost (fortunately, she doesn't have my pictures on her laptop, but it reminds me to save my own stuff more often).

Davia

Lucy said:

Tell me please....if it comes from the camera as a jpeg, do you
change it to a tiff????? Or do you have to be shooting in tiff? I
have been shooting in SHQ with my camera.
Thanks......

--
Lucy
C3020Z
pbase supporter

Click to expand...

The camera default is to take jpegs 1200x1600 at 72 resolution HQ.

I then change them to tif files. You can take the pictures as tifs but you would not be able to take many before your smart media card is full.

Charles

Thanks for the valuable information everyone.--BarbaraC2100uzi http://www.pbase.com/barbarabreits/galleries

I have done hours and hours of research on this. When I download pics from my camera to my computer, I immediately save them to CD-R's, thinking of them as my "negatives". Then I open them if need be in my graphics programs, do whatever adjustments are necessary, then save them in whatever format applies (JPEG for email, PNG for archived and prints). I also keep all my pics on a hard drive in their original JPEG format for easy access. If I need them, I just open them in my graphics program, make adjustments, then save them with a different file name. The original JPEG is kept intact this way -- no losses. I can rework and resave each pic hundreds of times if need be without affecting the original JPEG pics.

My main reason for all this is saving space. PNG files, my HQ choice, are up to ten times larger than corresponding JPEG files. My computer doesn't have room for that many hard drives (I take lots of pics).

I open my pictures thru camedia from there I burn them right to the cd-r. It is my understanding that you don't lose any info if you do your changes and rename them with another name.

All of my shots go directly to the cd from there I open them with camedia if i have a few photos, irfanview if a have lots of shots. I scroll thru the shots and delete the ones that are no good and leave the ones that are. When I have some that I want to print I will open them in photodeluxe and do my editing then save them to a 3 1/2 inch disc I take to walmart. If I put them on the web or send them out on emails I will edit and rezise them then save to my documents(which I usually clean out once a week).--ShanleyC-2100 http://www.pbase.com/shanley 'The important thing is not to stop questioning.' -Albert Einstein (F) I'm following richard on this one!

When I shoot at SHQ, it's 2048 x (I forget).....so thanks, I didn't realize that you could change them to 'tiff' files. As you say, to take them in 'tiff' would take up too much room. Appreciate the tip!
--LucyC3020Zpbase supporter

Oh Lordy......now I need a cd burner.....and an ex-tend-a-slide.....and a lens adapter.......and......and......and.....(sigh) and Christmas is sooooo far away....and my birthday's in December, too.........sigh

(I have a zip-drive that I don't know how to use yet...will that help?)--LucyC3020Zpbase supporter

Lucy said:

Oh Lordy......now I need a cd burner.....and an
ex-tend-a-slide.....and a lens
adapter.......and......and......and.....(sigh) and Christmas is
sooooo far away....and my birthday's in December, too.........sigh
(I have a zip-drive that I don't know how to use yet...will that
help?)
--
Lucy
C3020Z
pbase supporte

Click to expand...

Lucy,

You or someone alt to treat you to a CD burner. You can store 700mgs of informations on each CDR, and free up space on your hard drive. A zip drive can store 100 or 250 mgs of information depending on which zip you have. It is very easy to use. Just go to windows explorer then drag the image files onto the removeable drive(Zip Drive).

Clharles

When you change from 1200X1600 to 4x5.333 at 150 dpi, you are cutting out 75% of your original pixels. This is not good, if you want to maintain quality.

Lets do some math. (I'm an engineer and live by math)
4" X 150 pixels/inch = 600 pixels
5-1/3" X 150 pixels/inch = 800 pixels
600 X 800 = 0.48MP Your original image was 1.92 MP

Many people when they first get into digital photography do not understand what the 150dpi means. For computer screens it is better to say ppi which is pixels per inch. What this means is how many pixels the computer will scrunch into a linear inch on the screen. It has nothing to do with the image resolution. If you have a 1200 x 1600 image and you set the ppi to 100, the resulting image size will be 12"X16". If you set it to 200ppi, the resulting image will be 6" X 8". The resolution hasn't changed. The only thing that has changed is how many of the 1.92MP are being packed in every square inch.

Typically, saving the original jpeg to CD is the best way to go. you can put more on a cd than you could if they are saved as tiffs. Also, there is no loss of quality. The only way to lose quality is to open them with a photo editor and resave them. Just Copying the file to different locations does not affect the quality, nor does openning the file and viewing it.

I hope you have the original jpegs.

Charles Tarver said:

I am using an Olympus c2100 and my images are 1200x1600 HQ jpegs.

It is my understanding that everytime you open and close jpegs the
image losses some of its quality. I am currently changing them to
4x5.33 inch images at 150 resolution as a tif file. I save the
original jpegs on a CDR.

What do others do?

Click to expand...

To those of you who immediately save your pictures from camera to CDR, what if you only have a few (i.e. not a whole cd worth) - do you do a multisession disk? I've never tried it.

Davia

Lucy, replace your zip disk with a cd burner. You can get a cheap one - the ones by Buslink (the cd burners are called "Lite-On") are cheap and work great (see reviews on various web sites, but I'm telling you I got one to replace my old HP which had died after much use - I paid $59 after rebate at Best Buy for a 16x burner, and other than the fact that it makes a weird noise while burning, it is terrific, and it came with Nero 5.5, so I didn't even need to buy software).

Davia

I have a hp burner and with my original hp disk you have the option to leave the disk alone untill its full. Then it writes the cd to be read by all others until then it can only be read and wrote on mine. Right now I am using disc a called imitation and it does the same thing.....I think...I'm not sure. I have not come to the point of finishing it yet....lol--ShanleyC-2100 http://www.pbase.com/shanley 'The important thing is not to stop questioning.' -Albert Einstein (F) I'm following richard on this one!

Lucy,

Use what works for you......but keep in mind that if your computer crashed and your hard drive is gone(much like mine a few months ago) you lose all your photos. I chose to put mine on cd so I don't have to worry about it. A zip drive will work and since you have one you might as well use it.

--ShanleyC-2100 http://www.pbase.com/shanley 'The important thing is not to stop questioning.' -Albert Einstein (F) I'm following richard on this one!

Brian,

I understand the math part (I think), but what I don't get is why resolution does not increase if you increase the ppi from 100 to 200. It seems to me that if you double the pixels/area, the sharpness of the image would increase as well. Am I not understanding, or is this a semantics issue about the definition of resolution?

Thanks,
L1

Brian said:

Lets do some math. (I'm an engineer and live by math)
4" X 150 pixels/inch = 600 pixels
5-1/3" X 150 pixels/inch = 800 pixels
600 X 800 = 0.48MP Your original image was 1.92 MP

Many people when they first get into digital photography do not
understand what the 150dpi means. For computer screens it is
better to say ppi which is pixels per inch. What this means is how
many pixels the computer will scrunch into a linear inch on the
screen. It has nothing to do with the image resolution. If you
have a 1200 x 1600 image and you set the ppi to 100, the resulting
image size will be 12"X16". If you set it to 200ppi, the resulting
image will be 6" X 8". The resolution hasn't changed. The only
thing that has changed is how many of the 1.92MP are being packed
in every square inch.

Typically, saving the original jpeg to CD is the best way to go.
you can put more on a cd than you could if they are saved as tiffs.
Also, there is no loss of quality. The only way to lose quality is
to open them with a photo editor and resave them. Just Copying the
file to different locations does not affect the quality, nor does
openning the file and viewing it.

I hope you have the original jpegs.

Charles Tarver said:

I am using an Olympus c2100 and my images are 1200x1600 HQ jpegs.

It is my understanding that everytime you open and close jpegs the
image losses some of its quality. I am currently changing them to
4x5.33 inch images at 150 resolution as a tif file. I save the
original jpegs on a CDR.

What do others do?

Click to expand...

Click to expand...

If the output size remained the same (for instance 8x10), the resolution would quadruple if the ppi went from 100 to 200. But this is not what happens. When you tell the computer to switch from 100 to 200 ppi, the image shrinks from 8x10 to 4x5. In effect the image does look sharper, but all of the details become extremely small.

To Keep the image at 8x10 and increase from 100ppi to 200ppi, you'd have to have a sensor with 4x the resolution.

Resolution is how much detail one can see in an image. This is dependent on a number of things, the quality of the glass, the size of the chip, and the number of pixels on the chip. Once the pixure is taken, the resolution cannot be increased. Going from 100ppi to 200ppi, does not increase the resolution, it just makes the output picture smaller.

L1 said:

I understand the math part (I think), but what I don't get is why
resolution does not increase if you increase the ppi from 100 to
200. It seems to me that if you double the pixels/area, the
sharpness of the image would increase as well. Am I not
understanding, or is this a semantics issue about the definition of
resolution?

Thanks,
L1

Brian said:

Lets do some math. (I'm an engineer and live by math)
4" X 150 pixels/inch = 600 pixels
5-1/3" X 150 pixels/inch = 800 pixels
600 X 800 = 0.48MP Your original image was 1.92 MP

Many people when they first get into digital photography do not
understand what the 150dpi means. For computer screens it is
better to say ppi which is pixels per inch. What this means is how
many pixels the computer will scrunch into a linear inch on the
screen. It has nothing to do with the image resolution. If you
have a 1200 x 1600 image and you set the ppi to 100, the resulting
image size will be 12"X16". If you set it to 200ppi, the resulting
image will be 6" X 8". The resolution hasn't changed. The only
thing that has changed is how many of the 1.92MP are being packed
in every square inch.

Typically, saving the original jpeg to CD is the best way to go.
you can put more on a cd than you could if they are saved as tiffs.
Also, there is no loss of quality. The only way to lose quality is
to open them with a photo editor and resave them. Just Copying the
file to different locations does not affect the quality, nor does
openning the file and viewing it.

I hope you have the original jpegs.

Charles Tarver said:

I am using an Olympus c2100 and my images are 1200x1600 HQ jpegs.

It is my understanding that everytime you open and close jpegs the
image losses some of its quality. I am currently changing them to
4x5.33 inch images at 150 resolution as a tif file. I save the
original jpegs on a CDR.

What do others do?

Click to expand...

Click to expand...

Click to expand...