i960 resolution

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BF

Does anyone know what the highest Pixel Per Inch (not dots per inch) the
i960 will do? I know around 300 in considered professional quality.

Thanks
 
Pixels refers to computer viewing and capture and DPI refers to printing.

THEY ARE similar but not the same.

Printers operate in DOTS PER INCH. Image capture and computer viewing
operates in pixels and they can VARY depending on the hardware and I think
software of the electronic device.

What is it you are looking for?

http://www.robertstech.com/pixel/dotvspix.htm

this might help


: Does anyone know what the highest Pixel Per Inch (not dots per inch) the
: i960 will do? I know around 300 in considered professional quality.
:
: Thanks
 
Traveling said:
Pixels refers to computer viewing and capture and DPI refers to printing.

THEY ARE similar but not the same.

Printers operate in DOTS PER INCH. Image capture and computer viewing
operates in pixels and they can VARY depending on the hardware and I think
software of the electronic device.

What is it you are looking for?

http://www.robertstech.com/pixel/dotvspix.htm

this might help


: Does anyone know what the highest Pixel Per Inch (not dots per inch) the
: i960 will do? I know around 300 in considered professional quality.
:
: Thanks
Click to expand...
I am looking for the pixels per inch (not dots of ink but pixels per
inch) the i960 can print. I call it pixels per inch because the printer
manufacturers talk about dots of ink per inch which doesn't mean
anything to me. How many pixels per inch can a i960 print? If it takes 3
or 6 or 10 dots of ink to make one pixel how many pixels can it print
per inch? If we are talking dots per inch to mean pixels per inch then
how many dots per inch will the i960 print. I am not talking 4800 X 1200
dots of ink.
 
PRINTERS DO NOT PRINT IN PIXELS

DO a search in google and see if you can differentiate the difference


: Traveling wrote:
: > Pixels refers to computer viewing and capture and DPI refers to
printing.
: >
: > THEY ARE similar but not the same.
: >
: > Printers operate in DOTS PER INCH. Image capture and computer viewing
: > operates in pixels and they can VARY depending on the hardware and I
think
: > software of the electronic device.
: >
: > What is it you are looking for?
: >
: > http://www.robertstech.com/pixel/dotvspix.htm
: >
: > this might help
: >
: >
: > : > : Does anyone know what the highest Pixel Per Inch (not dots per inch)
the
: > : i960 will do? I know around 300 in considered professional quality.
: > :
: > : Thanks
: >
: >
: I am looking for the pixels per inch (not dots of ink but pixels per
: inch) the i960 can print. I call it pixels per inch because the printer
: manufacturers talk about dots of ink per inch which doesn't mean
: anything to me. How many pixels per inch can a i960 print? If it takes 3
: or 6 or 10 dots of ink to make one pixel how many pixels can it print
: per inch? If we are talking dots per inch to mean pixels per inch then
: how many dots per inch will the i960 print. I am not talking 4800 X 1200
: dots of ink.
 
Traveling said:
Pixels refers to computer viewing and capture and DPI refers to printing.

THEY ARE similar but not the same.

Printers operate in DOTS PER INCH. Image capture and computer viewing
operates in pixels and they can VARY depending on the hardware and I think
software of the electronic device.

What is it you are looking for?

http://www.robertstech.com/pixel/dotvspix.htm

this might help


: Does anyone know what the highest Pixel Per Inch (not dots per inch) the
: i960 will do? I know around 300 in considered professional quality.
:
: Thanks
Click to expand...
Let me give an example for my question. I just looked at above web site.
Great site by the way. A friend sent me an image from an 11 megapixel
camera that he asked me to do some work on with Photo Shop. The size was
about 4000 X 2400. If I want to print an 8 X 10 (4000/10 = 400 dots or
pixels per inch), however you want to say it. Is it better to print at
400 pixels per inch and leave the size alone (4000X2400)? Can the
printer print at 400 PPI? Or would it be better to set at 300 PPI and
resized the image so it will print at 300 PPI? Not knowing what the i960
can do is where my question comes from. Everytime I think I understand
this I confuse myself again.

Thanks again.
 
Let me give an example for my question. I just looked at above web site.
Great site by the way. A friend sent me an image from an 11 megapixel
camera that he asked me to do some work on with Photo Shop. The size was
about 4000 X 2400. If I want to print an 8 X 10 (4000/10 = 400 dots or
pixels per inch), however you want to say it. Is it better to print at
400 pixels per inch and leave the size alone (4000X2400)? Can the
printer print at 400 PPI? Or would it be better to set at 300 PPI and
resized the image so it will print at 300 PPI? Not knowing what the i960
can do is where my question comes from. Everytime I think I understand
this I confuse myself again.

Thanks again.
Click to expand...

If you are using Photoshop you dont need to worry about the dpi/ppi ect of
the printer.

Just make sure you have the proper printer drivers loaded for the printer,
then from the file menu choose "Print with preview":

In that preview window set the size of picture you want.

Set the options for "Use printer color matching"

Then from the driver choose the paper and orientation.

Then let the software do the rest.

If your monitor is set-up properly everything will come out OK. If your
monitor is not set up properly, you shouldn't be messing with other peoples
pictures until it is set up.
 
BF said:
Traveling wrote:

Let me give an example for my question. I just looked at above web site.
Great site by the way. A friend sent me an image from an 11 megapixel
camera that he asked me to do some work on with Photo Shop. The size was
about 4000 X 2400. If I want to print an 8 X 10 (4000/10 = 400 dots or
pixels per inch), however you want to say it. Is it better to print at
400 pixels per inch and leave the size alone (4000X2400)? Can the
printer print at 400 PPI? Or would it be better to set at 300 PPI and
resized the image so it will print at 300 PPI? Not knowing what the i960
can do is where my question comes from. Everytime I think I understand
this I confuse myself again.

Thanks again.
Click to expand...

I think your going to have to reset your brain and discard what you
are currently thinking i.e. stop confusing yourself.

Printers don't know anything about pixels. They just react to the
data stream feed them. Normally across the width of the paper the
nozzle spacing controls the print resolution and the stepping motor
controls the resolution down the length of the paper. My I860 has the
color nozzles spaced at 1200 dpi and the motor can step to 4800 dpi
resolution. Per Canon's manual the printer can place droplets pitched
as fine as 1/4800".

It is software/firmware that takes the input data (pixels) and scales
that to fit within the output size at the printer's resolution.
Theoretically, the closer your data matches the printers somewhat
fixed output resolution the better/sharper the print results should be.

Using your example if you are taking 4000 pixels of data and placing
them along the 10" length of the paper and the printer can step 4800
dpi, then 48,000/4000 = 12 drops of ink for each "pixel" of data.
Across the wide of the print the resolution is 19,200 droplet of ink
and you have 2400 "pixels" of data = 8 drops of ink per pixel of data.
All the scaling is handled by software/firmware.

The bigger the input data the larger the output data stream is and the
time to process the data goes up.

This is my take but other may think otherwise.

Mickey
 
I think your going to have to reset your brain and discard what you are
currently thinking i.e. stop confusing yourself.

Printers don't know anything about pixels. They just react to the data
stream feed them. Normally across the width of the paper the nozzle
spacing controls the print resolution and the stepping motor controls
the resolution down the length of the paper. My I860 has the color
nozzles spaced at 1200 dpi and the motor can step to 4800 dpi
resolution. Per Canon's manual the printer can place droplets pitched
as fine as 1/4800".

It is software/firmware that takes the input data (pixels) and scales
that to fit within the output size at the printer's resolution.
Theoretically, the closer your data matches the printers somewhat fixed
output resolution the better/sharper the print results should be.

Using your example if you are taking 4000 pixels of data and placing
them along the 10" length of the paper and the printer can step 4800
dpi, then 48,000/4000 = 12 drops of ink for each "pixel" of data. Across
the wide of the print the resolution is 19,200 droplet of ink and you
have 2400 "pixels" of data = 8 drops of ink per pixel of data. All the
scaling is handled by software/firmware.

The bigger the input data the larger the output data stream is and the
time to process the data goes up.

This is my take but other may think otherwise.

Mickey
Click to expand...

Please click the link below. If I go to resize in P.S., unselect
"resample image", set the size I want to print at 8X10, it shows it will
be at 406.4 pixels per inch. If I do the same thing with print with
preview and pick the size 8X10, photoShop is setting it at 406.4 PPI, I
assume. This is where the confusion comes in. I understand that printers
print in dots of ink per inch, but where does the 406.4 PPI come into
play. It obviously does something because it determines the size the
print is going to be. Sorry I am so thick but this sort of stuff bothers
me until I understand it. Thanks for your patience.

http://paintedover.com/uploads/4/imagesize.jpg
 
BF said:
Please click the link below. If I go to resize in P.S., unselect
"resample image", set the size I want to print at 8X10, it shows it will
be at 406.4 pixels per inch. If I do the same thing with print with
preview and pick the size 8X10, photoShop is setting it at 406.4 PPI, I
assume. This is where the confusion comes in. I understand that printers
print in dots of ink per inch, but where does the 406.4 PPI come into
play. It obviously does something because it determines the size the
print is going to be. Sorry I am so thick but this sort of stuff bothers
me until I understand it. Thanks for your patience.

http://paintedover.com/uploads/4/imagesize.jpg
Click to expand...

Isn't this just telling you that the "document" would be 406.4 ppi if
"printed" on the screen? PhotoShop doesn't know, after all, how many
nozzles your printer has or its resolution capabilities.
 
Isn't this just telling you that the "document" would be 406.4 ppi if
"printed" on the screen? PhotoShop doesn't know, after all, how many
nozzles your printer has or its resolution capabilities.
Click to expand...
The 406 determines the size it will be printed. If changed the size of
the finished print will change.
 
BF

I think you need to take a short course about pixels, printing, and DPI.
You seem so focused on the DPI number that you are truly missing how
photoshop or any other similar program manipulates the pixels for some form
of output viewing/printing. THE highest quality inkjet printing is 300
dpi. SO if you want to print a 4 in by 6 in print you would need an image
captures of 2.160,000. ( 4 x 300=1200 and 6 x300 = 1800. then 1200 x 1800
equals 2,160000. Pixels) An 8 x 10 inch would be 2400 x 3000 or 7.2 mega
bite pixels) You can do the math. What photoshop can do with various loss
of 'quality is add pixels or subtract pixels based on other pixels nearby
and thus can print even larger sizes mentioned. There are people claiming
and selling 20 x30 inch prints with excellent results. NO MATTER WHAT, the
printing is only 300 dpi. The people printing 20 x 30 are using 240 dpi and
when viewed at normal viewing distance are excellent.

As has been pointed out, the printer only prints at a certain DPI size.
Pixels size varies depending on the resolution AND the image size that is
set


:
: : The 406 determines the size it will be printed. If changed the size of
: the finished print will change.
 
THE highest quality inkjet printing is 300
dpi. SO if you want to print a 4 in by 6 in print you would need an image
captures of 2.160,000. ( 4 x 300=1200 and 6 x300 = 1800. then 1200 x 1800
equals 2,160000. Pixels) An 8 x 10 inch would be 2400 x 3000 or 7.2 mega
bite pixels) You can do the math.
Click to expand...

I understand what you are saying and understand the math to figure
picture size, but listen to what you just said. "The highest quality
inkjet printing is 300 dpi". My printer prints at 4800 X 1200 dpi. So
what you are saying is that the 300 dpi you are talking about is not the
same as the 4800 dpi the printer is talking about. (The printer is dots
of ink and it takes several dots of ink to equal a pixel.) That is what
I have been saying all along. What does the 300 dpi correspond too?
Could it be the same as picture elements?

6in X 300 dpi = 1800 pixels wide. So that means my printer must be
printing 300 pixels of the picture every inch. How else can you multiply
inches by dpi and come up with an answer of pixels?
If so that answers my original question.
 
BF said:
THE highest quality inkjet printing is 300

I understand what you are saying and understand the math to figure
picture size, but listen to what you just said. "The highest quality
inkjet printing is 300 dpi". My printer prints at 4800 X 1200 dpi. So
what you are saying is that the 300 dpi you are talking about is not the
same as the 4800 dpi the printer is talking about. (The printer is dots
of ink and it takes several dots of ink to equal a pixel.) That is what
I have been saying all along. What does the 300 dpi correspond too?
Could it be the same as picture elements?

6in X 300 dpi = 1800 pixels wide. So that means my printer must be
printing 300 pixels of the picture every inch. How else can you multiply
inches by dpi and come up with an answer of pixels?
If so that answers my original question.
Click to expand...

I think this is the answer to what you are asking. For 8 bit color you need
an area that can print 256 different intensities. This could be a matrix
8 x 32 dots. 1200 / 8 equals 4800 / 32 or 150 pixels per inch. By having
different dot sizes this can be doubled to 300 pixels per inch. By various
interpolation methods the printer software may be able to make some
improvement
 
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