tiffs and jpegs (checking on understanding of iNova)

[Dee Smith]

OK, let me see if I have this straight. According to Peter iNova (e-book), you should take your pictures with Fine quality (jpeg) and 3:2 size (to save space and for faster transfer), then you take them to your imaging program of choice and convert them to a tiff for long term storage and to edit so that you don't lose pixels while opening and editing. Is this correct? I have a 995.

--Your comments are appreciated.
Dee Ann

 

[Peter iNova56624]

OK, let me see if I have this straight. According to Peter iNova
(e-book), you should take your pictures with Fine quality (jpeg)
and 3:2 size (to save space and for faster transfer), then you take
them to your imaging program of choice and convert them to a tiff
for long term storage and to edit so that you don't lose pixels
while opening and editing. Is this correct? I have a 995.

--
Your comments are appreciated.
Dee Ann

It depends on how much change you make to the original.

When you copy the file into your computer, it is already at maximum quality. By working on a copy, it is never endangered and you may not need to actually save a TIFF along the way.

You can save images at the same or lower JPEG after making modifications or save them as TIFFs to preserve all changes at the absolute maximum quality--the option is yours.

I rarely save images at sizes larger than the original, unless extensive graphic treatments and adjustments have been made. And then only if the use of the image is for a premium print or destination.

If you open and close the JPEG image numerous times in Photoshop, saving each time, the actual drift you might expect from each save does not manifest. Try repeated savings of an image at 60% using Photoshop's "Save For Web" option. It's so good that the tenth re-save will likely not appear noticeably different at all from the second.

When you slide the pixels laterally, as happens with adjustments such as crop or size change, the result is that the original relationship of 8-pixel blocks that underlie the JPEG image is usually lost. The first save will introduce its level of artifacts and subsequent non-moved re-saves will create less and less.

Did that help?

-iNova

 

[Dee Smith]

OK, let me see if I have this straight. According to Peter iNova
(e-book), you should take your pictures with Fine quality (jpeg)
and 3:2 size (to save space and for faster transfer), then you take
them to your imaging program of choice and convert them to a tiff
for long term storage and to edit so that you don't lose pixels
while opening and editing. Is this correct? I have a 995.

--
Your comments are appreciated.
Dee Ann

It depends on how much change you make to the original.

When you copy the file into your computer, it is already at maximum
quality. By working on a copy, it is never endangered and you may
not need to actually save a TIFF along the way.

You can save images at the same or lower JPEG after making
modifications or save them as TIFFs to preserve all changes at the
absolute maximum quality--the option is yours.

I rarely save images at sizes larger than the original, unless
extensive graphic treatments and adjustments have been made. And
then only if the use of the image is for a premium print or
destination.

If you open and close the JPEG image numerous times in Photoshop,
saving each time, the actual drift you might expect from each save
does not manifest. Try repeated savings of an image at 60% using
Photoshop's "Save For Web" option. It's so good that the tenth
re-save will likely not appear noticeably different at all from the
second.

When you slide the pixels laterally, as happens with adjustments
such as crop or size change, the result is that the original
relationship of 8-pixel blocks that underlie the JPEG image is
usually lost. The first save will introduce its level of artifacts
and subsequent non-moved re-saves will create less and less.

Did that help?

-iNova

ok.....I think. So, it really doesn't matter at all. This stuff is hard for newbies. Maybe you can answer the other big question (at the minute). I tried taking a picture and blurring the background (a lot)---about 30% of the picture. I did not crop, but I did resize (from about 4x5 to 8x10). The result was a file size about 75% smaller than the original and now when I take it to print, instead of 300dpi, it said 72 dpi. NOT GOOD. I think I understand why the file was smaller....I took out a bunch of detail. I also think I understand why now it was at 72 dpi.....I resized that ......ok I don't understand it at all. I think I am missing the basic understanding of a bunch of stuff.