72 dpi jpeg --> 300 dpi tiff

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.

The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

Cine wrote:

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.
The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

I do not understand why the pull down menu does not give you the option to change the resolution......mine does. PS 6, and always been like that. Is yours greyed out?

Anyways. I take it that book is going to be done in XPress or Indesign. Not sure if you are doing the lay out or your printer. I guess the printing office. In that case just send them the raw material and do not worry about the resolution. They will solve it.
--
Peter

JPEG usually does not have the ability to internally set or record the image's resolution (DPI). JPEG is also a destructive compression algorithm. For these reasons, people in the publishing industry often do **not** want this type of image file(s).

To fix both of the above problems, convert the graphic to the Tagged Image File Format (TIFF), and use something like LZW compression if you really need to compress the image. MOST publishers will probably want the image in the uncompressed form, and quite possibly also want it converted to the CYMK color space. If at all possible, leave converting the image from RGB to CYMK to the publisher / printer ... there are soooooo many ways of doing that, that it's easy to come up with something that looks horrible.

(1) Use PhotoShop to resave the graphic as a TIF file;

(2) Using the 'Image/Image Size' dialog box, change the resolution to 300 dpi;

(3) Resave the image with the new resolution;

(4) If necessary, and again using the 'Image / Image Size' dialog box, resize the image to your final size.

(5) Resave it using the 'File / Save As' dialog box, and use a new name.

"Cine" wrote in message

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.
The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

Not my info but you mat find it usefull;

How to convert a photo to print high quality in a four color process.

What you need to do to convert a jpg into a Tiff. Assuming you have Adobe Photoshop, you simply need to do the following.

1) Open (or launch) the photo in Photoshop.
2) Go to the Menu - select Image - Mode - then CMYK (which by the way stands for Cyan, Magenta, Yellow, Black - the four process colors)
3) Go to Image - Image Size - And click on the Resample Image Box (lower
left) so NO checkmark appears. Right above, you will see three boxes that will allow you to type in information... they say Width: Height: & Resolution. Change the resolution from 72 to 300. Please note that the original measurements will change in the Width: and Height: Boxes to a smaller size. NOTE: Steve's original (72 Resolution) images are usually sized at 34.222" x 22.889" and will re-size down to 8.213" x 5.493" when rez-ed up to 300 Resolution. Please make sure you have correctly UNchecked the Resample Image Box in this step at the beginning. Now close the Image size box by clicking OK in upper right corner.

4) If you have no sense of color - and like what you see - Select File at the top left of the menu and drag down to Save As. Then select where you want to save the photo. Give it a name and then toggle the Format Box down to TIF. Click the Save Button in the lower right. A new Tiff Options window will pop up asking you if you want to save this tiff for the inferior IBM PC format or the most excellent Macintosh format. Your choice here - depending what you are driving. Leave the LZW compression unchecked. Then click Ok

This photo is now ready to print in any magazine, brochure or catalog.

BUT WAIT.... You might want to do a little color correction before closing this beast.

I can't tell you all the secrets because this is where I make the big bucks. But here are a few tips...
1) In the Tools panel there is a little tool that looks like an Eye Dropper... select that and place it over some of the contrasty parts of the photograph. Make sure the color information palette is open so you can read the color values (Menu - Windows - Show Info).
2) Pick what you think should be the whitest part of the photo. Wave the little Eye Dropper over it and look at the Info Palette. The whitest area should always have at least 2-3 points Cyan... maybe 1-2 points Magenta. 0-1 yellow, 0-1 black... Now remember... that's the WHITEST Point.

I find the best and quickest tool for quick color correction is the Selective Color Palette (Menu - Image - Adjust - Selective Color). At the top of the box you can toggle the Color Box to select the color you want to tweak (Red, Yellow, Green, Blues, White, Natural, Black). Select the color you want to change. Remember, always start by checking the color values of the area of the photo you want to change first by using the Eye Dropper and referring to the Info Palette. You can color correct a photo quite a bit with this tool. For some reason with digital... the Yellow always creeps up into the blues... so make sure to pull the yellow Waaaaay down to about 7-12 points.

Color is definitely in the eye of the beholder... and the printer... and the press... and the paper.... but a little tweaking in Photoshop can definitely help improve any photo improve on color.

Okay... two more tips:
The brightness/contrast tool is good for brightening up those dark photos (Menu - Image - Adjust - Brightness/Contrast).
Sharpening: I find using the Unsharp Mask tool works best. (Menu - Filter - Sharpen - Unsharp Mask) Once open you will find three sliding scales to adjust... Amount: Radius: and Threshold: Set the Threshold at 0 (zero). set the Radius at 1.0. You can then adjust the amount to the necesssary focus amount. About 64 to 90 on the Amount seems to do the trick to make them crystal clear.

Okay... I hope that gets some of you novices enough knowledge to get a raise.

I know I am going to hear a ton of different opinions on how to adjust color from the rest of you pros... but remember... Opinions are like Digital Cameras... everyone has one.

"Scruff" posted:
"...
2) Go to the Menu - select Image - Mode - then CMYK (which by the way stands
for Cyan, Magenta, Yellow, Black - the four process colors) ...."

And ... promptly screw up the image and guarantee poor reproduction in the final printed book. Doing a good job of converting an RGB file to CMYK is not quite as simple as the information you have quoted would lead you to believe.

PhotoShop's "default" color settings usually result in a rather poor conversion. As a minimum ... you should probably have noted that the user should *definitely* consult "the printer" (not "the publisher" ... but the person who will actually be *printing* the book) to find out what conversion parameters work best on his setup. Further, in order for the OP to have the full set of tools to do the job, you could have referred him to the 'Applied Color Theory' group on Yahoo, hosted by Dan Margulis at Ledet.com

http://www.ledet.com/margulis/articles.html
http://www.ledet.com/margulis/ACT_postings/ACT.htm

Another option, would have been informing the OP as to how to join the 'Applied Color Theory' mailing list ... as follows: Go to the Yahoo! Groups site by clicking on this link:

http://groups.yahoo.com/i?i=GPPzL803nnMa7OZIbwDxAjAiZRM& e=rsdwla%40gte%2Ene t

(If clicking doesn't work, "Cut" and "Paste" the line above into your Web browser's address bar.)

On Sat, 12 Mar 2005 17:56:55 GMT, "RSD99" found these unused words floating about:

JPEG usually does not have the ability to internally set or record the image's resolution (DPI). JPEG is also a destructive compression algorithm. For these reasons, people in the publishing industry often do **not** want this type of image file(s).

To fix both of the above problems, convert the graphic to the Tagged Image File Format (TIFF), and use something like LZW compression if you really need to compress the image. MOST publishers will probably want the image in the uncompressed form, and quite possibly also want it converted to the CYMK color space. If at all possible, leave converting the image from RGB to CYMK to the publisher / printer ... there are soooooo many ways of doing that, that it's easy to come up with something that looks horrible.

Amended procedure:

Using the 'Image/Image Size' dialog box, change the resolution to 300 dpi; and UNCHECK the "resample/resize" box !!!!

Resave the image using the 'File / Save As' dialog box, and use a new name, with the new resolution and in the desired format (TIFF);

"Cine" wrote in message

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.
The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

Cine wrote:

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.
The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

Uncheck Resample in the Image Size dialog.

--
Comic book sketches and artwork:
http://www.sover.net/~hannigan/edjh.html
Comics art for sale:
http://www.sover.net/~hannigan/batsale.html

Thanks for that correction / addition.

"J. A. Mc." wrote in message

On Sat, 12 Mar 2005 17:56:55 GMT, "RSD99" found these unused words floating about:

JPEG usually does not have the ability to internally set or record the image's resolution (DPI). JPEG is also a destructive compression

algorithm.

For these reasons, people in the publishing industry often do **not**

want

this type of image file(s).

To fix both of the above problems, convert the graphic to the Tagged

Image

File Format (TIFF), and use something like LZW compression if you really need to compress the image. MOST publishers will probably want the image

in

the uncompressed form, and quite possibly also want it converted to the CYMK color space. If at all possible, leave converting the image from

RGB

to CYMK to the publisher / printer ... there are soooooo many ways of

doing

that, that it's easy to come up with something that looks horrible.

Amended procedure:

Using the 'Image/Image Size' dialog box, change the resolution to 300

dpi;

and UNCHECK the "resample/resize" box !!!!

Resave the image using the 'File / Save As' dialog box, and use a new

name,

with the new resolution and in the desired format (TIFF);

"Cine" wrote in message

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take

some

photos for the book. My publisher wants 300 dpi tiff files.
The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

Image>Image Size>Uncheck Resample Image at bottom> type 300 in Resolution box.

File> Save As> Choose Tiff in pull down menu> Navigate to location you want to save it> Click Save.

Steve

--- faith \'fath\ n : firm belief in something for which there is no proof. Webster's Dictionary

From: Cine
Organization: Freak
Newsgroups: alt.graphics.photoshop
Date: Sat, 12 Mar 2005 08:57:29 -0800
Subject: 72 dpi jpeg --> 300 dpi tiff

Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.
The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

I found all that on a professional photographers web site http://www.stevebruhn.com/news/ . This guy is one of the most successful, premier race photographers out there. His site is directed at magazine publishers who then set-up for printers, not that you don't know that! I noticed that he said everyone has their own way to do things. Guess that was directed at you, lol.

"RSD99" wrote in message

"Scruff" posted:
"...
2) Go to the Menu - select Image - Mode - then CMYK (which by the way stands
for Cyan, Magenta, Yellow, Black - the four process colors) ..."

And ... promptly screw up the image and guarantee poor reproduction in the final printed book. Doing a good job of converting an RGB file to CMYK is not quite as simple as the information you have quoted would lead you to believe.

PhotoShop's "default" color settings usually result in a rather poor conversion. As a minimum ... you should probably have noted that the user should *definitely* consult "the printer" (not "the publisher" ... but the person who will actually be *printing* the book) to find out what conversion parameters work best on his setup. Further, in order for the OP to have the full set of tools to do the job, you could have referred him

to

the 'Applied Color Theory' group on Yahoo, hosted by Dan Margulis at Ledet.com

http://www.ledet.com/margulis/articles.html
http://www.ledet.com/margulis/ACT_postings/ACT.htm

Another option, would have been informing the OP as to how to join the 'Applied Color Theory' mailing list ... as follows: Go to the Yahoo!

Groups

site by clicking on this link:

http://groups.yahoo.com/i?i=GPPzL803nnMa7OZIbwDxAjAiZRM& e=rsdwla%40gte%2Ene

t

(If clicking doesn't work, "Cut" and "Paste" the line above into your Web browser's address bar.)

CF,

First, think of an image size as only in pixels. Pixels are the foundation of an image's size.

The only time the dpi comes into play is when you want to print it. if the cropped image will be printed at 3 inches by 4 inches at 300 dpi, then the pixel dimensions need to be 900 px by 1200 px. Simple multiplication and division.

If you go to Image and select Image Size, make sure the resample box is unchecked, and change the 72 dpi to 300, then the image size will appear in inches ( if that is the measurement selected).

My suggestion is to take all the pictures at the highest resolution your camera will allow, save the image in tif in Photoshop, and send the tif to your publisher.

Do not resave a jpg as jpg, as it degrades the image each time it is saved in jpg, due to the lossy compression. Keep your original image file unchanged, and save it in tif to "play with it". The tif files do not lose quality due to lossy compression when they are resaved.

You might see if your camera can save directly as tif. The image quality will be better, but the image file size will also be larger.

Good luck,

Dennis

"Cine" wrote in message
Hi gang,

I just got a digital camera (Sony DSC-P100) and I've discovered that I can't adjust the dpi -- it only takes photos in 72 dpi. I'm a writer with a book coming out in May and I need to use the camera to take some photos for the book. My publisher wants 300 dpi tiff files.

The camera is a 5.1 megapixel so it takes fairly large images (2592 x 1944 pixels) but when I try to adjust the dpi in the "Image Size" pulldown in Photoshop, it just ups the width x height pixel ratio too. What I want to do is squash the pixels down to 300 dpi.

How do you do this?

Thanks,

Cinefreak

"J. A. Mc." wrote in message

<SNIPPED TO SAVE SPACE- NOT TO EDIT MEANING>

Amended procedure:

Using the 'Image/Image Size' dialog box, change the resolution to 300 dpi; and UNCHECK the "resample/resize" box !!!!

Resave the image using the 'File / Save As' dialog box, and use a new

name,

with the new resolution and in the desired format (TIFF);

Not trying to be difficult:

I've never relly understood the need to UNCHECK that box.

What are the consequences of not doing so?

What are the advantages for doing so?

Sincere questions.

Any reply gratefully appreciated.

--
Build a man a fire and he will be warm for a day; set a man on fire and he will be warm the rest of his life. - John Dey

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In article <424c0a9b$>,
"Captain Volume" wrote:

I've never relly understood the need to UNCHECK that box.
What are the consequences of not doing so?

What are the advantages for doing so?

In English, "resample image" means "change the number of pixels."

If you resample an image, this changes the number of pixels--if you resample down, it removes pixels, and if you resample up, it adds new pixels created out of thin air. Both will degrade the quality of the image.

Now, if you are making an image smaller, it is often a good idea to resample the image. However, if you are increasing the size of an image, resampling is going to produce an inferior quality image--no way around that.

--
Art, photography, shareware, polyamory, literature, kink: all at http://www.xeromag.com/franklin.html

"Tacit" wrote in message

In article <424c0a9b$>,
"Captain Volume" wrote:

I've never relly understood the need to UNCHECK that box.
What are the consequences of not doing so?

What are the advantages for doing so?

In English, "resample image" means "change the number of pixels."
If you resample an image, this changes the number of pixels--if you resample down, it removes pixels, and if you resample up, it adds new pixels created out of thin air. Both will degrade the quality of the image.

Now, if you are making an image smaller, it is often a good idea to resample the image. However, if you are increasing the size of an image, resampling is going to produce an inferior quality image--no way around that.

--
Art, photography, shareware, polyamory, literature, kink: all at http://www.xeromag.com/franklin.html

Thanks

--
Build a man a fire and he will be warm for a day; set a man on fire and he will be warm the rest of his life. - John Dey

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