How can I resize and keep original H and W

D
Posted By
DosBoss57
Sep 3, 2003
Views
518
Replies
8
Status
Closed
On Wed, 03 Sep 2003 22:06:38 GMT, "Pat" wrote:

I resized from 72dpi to 300dpi, using the bicubic option, and got a smaller sized image in inches. Is there a way to resize using more dpi and keep the original width and height of the image?

Fractals?

Wavelets?
I tried resizing and what you are trying to do seems to work for me….I went to Image>Size andd changed the pixels/inch to 300. When you do this you will notice that the height and width grow enormously. I checked "constrain proportions" and entered the original height in the appropriate box. then clicked OK and it seems to work. Doesn’t even change the file size. Maybe it doesn’t really work and the software is fooling me somehow. Maybe some guru can explain if this really works or not

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ben-dover
Sep 3, 2003
if you look at the navigator you will probably see that it just shrunk the photo to keep it on the screen but trust us if you went from 72 dpi to 300 dpi your picture is the same size all it did is squeezed 300 dots within an inch instead of 72.
"Pat" wrote in message
I resized from 72dpi to 300dpi, using the bicubic option, and got a
smaller
sized image in inches. Is there a way to resize using more dpi and keep
the
original width and height of the image?

Fractals?

Wavelets?

M
Madsen
Sep 3, 2003
Pat wrote:

Is there a way to resize using more dpi and keep the
original width and height of the image?

Read your answers in comp.graphics.apps.photoshop and it wouldn’t hurt reading the following page too.

<http://www.cs.tut.fi/~jkorpela/usenet/xpost.html#why1>


Regards
Madsen.
P
Pat
Sep 4, 2003
"DosBoss57" wrote in message
On Wed, 03 Sep 2003 22:06:38 GMT, "Pat" wrote:

I tried resizing and what you are trying to do seems to work for me….I went to Image>Size andd changed the pixels/inch to 300. When you do this you will notice that the height and width grow enormously. I checked "constrain proportions" and entered the original height in the appropriate box. then clicked OK and it seems to work. Doesn’t even change the file size. Maybe it doesn’t really work and the software is fooling me somehow. Maybe some guru can explain if this really works or not

I didn’t describe it properly. I’m sorry. I want the image size and quality to remain constant. After the conversion, the image looks blured and poor quality.

INPUT GRAPHIC

Pixel Dimension: 680 W x 345 H
Document Size: 9.444 inches x 4.792 inches
Resolution: 72 pixels/inch

I Change Resolution to 300

After Bicubic Conversion

Pixel Dimension: 2833 W x 1438 H
Document Size: 9.444 inches x 4.792 inches
Resolution: 300 pixels/inch

Quality of image now looks bad.
P
Pat
Sep 4, 2003
Maybe I’m asking for the impossible. Lets say you scan an image and its 300dpi and looks great because you’ve got all that detail working for you in every square inch of the 5×7 image.

Next, you scan the same 5×7 image at 72dpi and it also looks just as good but the size is different from the first image. Is it possible to scale the second image up to the same size and density (300dpi) as the first image.

It was my understanding that fractals and wavelets have the ability to scale without any resolution loss.

Thanks for helping.

"ben-dover" <http://www.gilligan@theisle> wrote in message
if you look at the navigator you will probably see that it just shrunk the photo to keep it on the screen but trust us if you went from 72 dpi to 300 dpi your picture is the same size all it did is squeezed 300 dots within
an
inch instead of 72.
"Pat" wrote in message
I resized from 72dpi to 300dpi, using the bicubic option, and got a
smaller
sized image in inches. Is there a way to resize using more dpi and keep
the
original width and height of the image?

Fractals?

Wavelets?

J
Jasper
Sep 4, 2003
These aren’t fractals. You don’t want to resample upwards if possible. In your example, scan the image once at 300dpi. Then resample a second version at 72dpi from the original. It works well going down but not going up.

Jasper

"Pat" wrote in message
Maybe I’m asking for the impossible. Lets say you scan an image and its 300dpi and looks great because you’ve got all that detail working for you
in
every square inch of the 5×7 image.

Next, you scan the same 5×7 image at 72dpi and it also looks just as good but the size is different from the first image. Is it possible to scale
the
second image up to the same size and density (300dpi) as the first image.
It was my understanding that fractals and wavelets have the ability to
scale
without any resolution loss.

Thanks for helping.

"ben-dover" <http://www.gilligan@theisle> wrote in message
if you look at the navigator you will probably see that it just shrunk
the
photo to keep it on the screen but trust us if you went from 72 dpi to
300
dpi your picture is the same size all it did is squeezed 300 dots within
an
inch instead of 72.
"Pat" wrote in message
I resized from 72dpi to 300dpi, using the bicubic option, and got a
smaller
sized image in inches. Is there a way to resize using more dpi and
keep
the
original width and height of the image?

Fractals?

Wavelets?

B
ben-dover
Sep 4, 2003
i think you are mixed up. if you scan at 300 then it looks alot larger on the screen but if you print it it will be the original size just more clearer than printing at 72 dpi and if you were to take a 72 dpi picture and size it up it becomes very blocky looking.
"Pat" wrote in message
I resized from 72dpi to 300dpi, using the bicubic option, and got a
smaller
sized image in inches. Is there a way to resize using more dpi and keep
the
original width and height of the image?

Fractals?

Wavelets?

P
Pat
Sep 4, 2003
I used the scanner as an example everyone can relate to because I didn’t want to introduce video into the equation, for purposes of discussion, but its really a 720x480x24 @ 72dpi capture of a video frame.

"ben-dover" <http://www.gilligan@theisle> wrote in message
i think you are mixed up. if you scan at 300 then it looks alot larger on the screen but if you print it it will be the original size just more clearer than printing at 72 dpi and if you were to take a 72 dpi picture
and
size it up it becomes very blocky looking.
"Pat" wrote in message
I resized from 72dpi to 300dpi, using the bicubic option, and got a
smaller
sized image in inches. Is there a way to resize using more dpi and keep
the
original width and height of the image?

Fractals?

Wavelets?

P
Pat
Sep 4, 2003
Ok, maybe I’m not up on the reality side of the technology game. I know that fractals and wavelets have the mathematical properties to scale up without resolution loss. I remember seeing demos at a Sig Graph show, sponsored by the ACM, years ago. I just naturally thought that this technology had propogated down to the real world of deliverable products. I guess I was wrong.

"wes" wrote in message
As others have said, you will usually degrade the image when you scale it up. You might try stair interpolation to see if you can get close to what you want. Just make an action that increases the size of the image by 10%. Then repeat this action until you get the size you want and check out the appearance. You will only be able to take it to maybe 50% if at that. Sometimes this will good enough for the job you are trying to do but
mostly
it will not look good.

"ben-dover" <http://www.gilligan@theisle> wrote in message
i think you are mixed up. if you scan at 300 then it looks alot larger
on
the screen but if you print it it will be the original size just more clearer than printing at 72 dpi and if you were to take a 72 dpi picture
and
size it up it becomes very blocky looking.
"Pat" wrote in message
I resized from 72dpi to 300dpi, using the bicubic option, and got a
smaller
sized image in inches. Is there a way to resize using more dpi and
keep
the
original width and height of the image?

Fractals?

Wavelets?

MacBook Pro 16” Mockups 🔥

– in 4 materials (clay versions included)

– 12 scenes

– 48 MacBook Pro 16″ mockups

– 6000 x 4500 px

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