File size vs resolution

I don't understand how one photo can be a larger file size than another while the other has a higher resolution??
example
Photo 1: 780KB - 984x1472
Photo 2: 454KB - 1600x1200
btw (photo 2 happens to be more clear

Areas of continuos tone can be simplified - therefore reduced - more than areas with lots of detail. For example, if you had a picture of a wall-any single color, light or dark- the compression algorithm could look at the whole wall and define it as a big rectangle and use just a few bytes of information.
In contrast, if you had a scene with many details, it would be necessary to use a finer calculation and representation to avoid losing those details in the compressed image.
DPI= dots per inch and is only really relevant for printing. ie, a 1200x1800 image file printed at 300 dots per inch would be printed as a 4"x6" picture.
If you were to print the same file at 600 dpi, it would be 2"x3" picture.
DPI matters because a picture printed at 600 dpi will normally appear sharper and clearer than one printed at 300 dpi. Most people will recommend that you print at at least 150 dpi in order to get a decent printed picture. This means that you should think about whether you plan to print, and if so, how big you want to print before you take the picture to make sure it will have enough information to fill out the desired picture size at the desired dpi.
Screen dpi (or more accurately, ppi (pixels per inch)) can vary depending on the size and selected resolution of the screen.
So, it is incorrect to say "1600x1200dpi"- the image size is 1600x1200 pixels (about 1.92 MegaPixels), not 1600x1200 dots per inch.
Message was edited by: Mike N. (nahyunil)

Similar Messages

Acceptable File Size and Resolution for Still Photos in Keyframe Motion

Hello Hello
I know that FCE HD (as other Video Editors), will automatically fit a still photo's size to it's default capability of 720 x 480 Correct?
Well, in regard to making the best possible ZOOMS, and Pans from Still Photos, is it neccessary to re-size all your photos (from an external editor like photoshop), to a specfic size?
According to an older book for FCE, it sez that actually photos re-sized to 720x534 with a resolution of 72 are best. *The proper proportion for NTSC.
And I noticed that when I inserted larger JPG still sizes (like about a meg), on the FCE timline, and when applying Panning, or Zooms, some of the rendered images with motion didn't pan or zoom smoothly.
Is that because those file sizes were TOO large?
Well I have soooo many stills that need to be imported into this particular project that it would be a lot easier for me to just generally reduce these stills (by percentage).
And is the magic resolution amount supposed to be 72?
Because if that's the case I can re-size all my photos to 72, and try to keep the file sizes down to say 300 KB's or so.
Sound like a plan?

Thank you guys
"basically, you should try to make your images large enough so they never have to be scaled beyond 100% in the motion tab in fcp."
Actually as I mentioned some of these file sizes are very large. About 800-900 KB's - and what as a result, what I've noticed is that I actually had to DECREASE the viewing area in both the Browser Window, and the Canvas Winbow just to be able to see the whole image.
Ok - so the 72 DPI is not as important as the dimensions of the photo. But as I said I have soooooo many of these that it would take me forever to manually re-size them all not to mention the fact that re-sizing some of them (odd shapes),would throw the images out of balance.
So again I ask - if there is NO motion applied to the photo, file sizes of about 200 to 350 KB's appear just beautifully ....
BUT
If I need to PAN or ZOOM, is it ok to laod a 1 MEG sized JPG onto the timeline and start working with Keyframe?????
In fact in some cases I'm actually using these larger file JPS's (1 meg or more), so that they TOTALLLY fit the canvas window (cropping them by enlargment)
*With some clipping of the original image of course ...
Why do I do this?
So that you don't see the usual border with horizontal images, or vertical images - know what I mean?
Thanx

File size and resolution.

Hello,
I have been attempting to create PDF files using Acrobat (both 9.5.5 and 10.1.9) but have run into some questions for which I haven't found clear answers.
I started with pages scanned at 300 dpi and saved as TIFF files. Following that I have tried to bring these into Acrobat using various methods. I have imported them as TIFF and have also compressed them first in Photoshop (reduced resolution to 200 dpi and used 'Saved As' and 'Save for Web') and saved files as JPEG. In all instances I have found a reasonable reduction in the file resolution. For instance, one document had pages saved as TIFF files with a resolution of 1800 x 2700 dpi but the resolution was reduced to only 432 x 648 once it was saved as a PDF file (resolution is shown by the 'Get Info' command in OS X).
Considering the entire page is treated as a huge image file (whether TIFF or JPEG) since it is a scan, how can I control the resolution when creating PDFs so that it doesn't get reduced this much ? I wish to create a PDF that can be viewed on screen and it is not too big to be downloaded by those with slow Internet connections, but at the same time has enough quality to be printed and produce good quality documents.
Thank you in advance.

Hi Bill and thank you for your answer.
I dragged the first TIFF file onto the Acrobat icon which opened it and then dragged the others onto my acrobat screen and positioned them in proper sequence. After that I used the 'Save As' command so that the file would be saved without any type of compression or optimization (I am not sure if I did this right and if this is how Acrobat works). After that I looked at the file using Apple's OS X 'Get Info' command and the pop window with information on the file showed a file size of 432 x 648. How did this file go from a resolution of 300 dpi or a size of 1800 x 2700 pixels to just 432 x 648 ? I am not understanding how Acrobat works and how it processes PDF files.
Considering the files had 300 dpi and the optimizer had a downsampling of 150 dpi (before I changed it) and 200 dpi (after I changed it) the file size should have changed to 900 x 1350 pixels (at 150 dpi) and/or 1200 x 1800 pixels (at 200 dpi). No ?
Two more questions:
1. I don't know how exactly to use the preflight function you mentioned. How does it work ?
2. When you say I should export images to check their resolution, since my pages were scanned and saved as 300 dpi TIFF files wouldn't an entire page be considered as an image file ? Wouldn't the export command see the entire page as an image ?
Can you help me understand this ? I am confused.
Thank you in advance,
Joe.

Photo File Size and Resolution

In the process of creating a book using iPhoto appeared in the corner. The warning said that the photo was of low resolution. I have scanned a lot of my slides, and the files are 65 Mb, which is too big, and the ones with the warning were around 200 Kb. My question is to get the best resolution (while creating a book) what size file should I import into iPhoto?

frevy,
Welcome to the Apple Discussions.
As you discovered,the low resolution warning hopefully prevents insertion of low quality pictures in a book.
Here is an Apple kb article which lists minimum resolutions for different size pages, along with helpful info:
http://docs.info.apple.com/article.html?artnum=61025
Hope it helps,
Scott
MacBook Pro,MacBook ,Powerbook G4 1.33 14,,isight Mac OS X (10.4.9) Canon D20,ipod 30 GB,Adobe Photoshop

File size or resolution when exporting to PDF file.

Post Author: Esio Nunes
CA Forum: Deployment
Hello,
I'm using the following code to export my reports to PDF format, by an ASP.NET page:
CType(crReportClientDoc, CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocument).PrintOutputController.Export(CrReportExportFormatEnum.crReportExportFormatPDF)
But I need to produce files with sizes lower than now. Making some tests in Adobe, I note if I reduce the pdf resolution, the files became with a reduced size. Does anyone know if is it possible to configure the resolution when generating PDF files by Crystal? I looked to ExportEx method and PDFExportFormatOptionsClass, but I didn't find any about it.
Thanks to all
Ésio

Post Author: Argan
CA Forum: Deployment
Nope. Crystal uses an old version of pdf (1.x I believe) for backward compatibility reasons.
There is no way to reduce the size of the pdf that you export other than changing what is on the report itself.

Why are the file sizes of exported jpegs so small?

I shoot raw, studio portraits mostly. I import to Lightroom 5 as DNG and then edit. Upon exporting as jpegs, the file sizes end up way too small, some of the cropped and/or black & white conversions as small as 560 KB, even with slider to 100%. Un-cropped color photos are ending up from 1.5 to 3MB. What am I doing wrong?

Jim,
Thank you for your response. I think some of the difficulties in this thread are that there have been more than one person reporting issues, which may or may not be exactly the same or different from the initial one reported by the original poster. Then, anyone else commenting can easily intermix bits and pieces from any or all of the other posters interrelated issues. Also, I should have added to my last response in clarification what I meant about the overall dimensions. I was referring specifically to inches, not file size, not resolution.
My very first post was a thank you to Rusty's post for his comment about how he had noticed his Resolution setting had been changed from ppi to ppcm. I didn't say anything about printing. In fact, I never even stated what my issue was. I was merely thanking him for sharing information. So, for anyone to tell me that I didn't know what my issue is, that I didn't understand was quite laughable to me. And then the other two posters were almost equally ridiculous, who said that since they didn't experience the same conditions as myself and another person, it couldn't be a programming error.
Trust me, I understand explicitly about resolution, image size, dimensions, file size and how they are all interrelated. Resolution is essentially the density of pixels. (And I'm still used to dpi vs ppi, that's how long I've been working with the concept.) I often help other people understand in whichever mode is most comfortable for them to grasp the knowledge of how to know what size image they need/want to capture and print depending on the types of measurements shown on their equipment used and by whomever they might be working with for finish work.
I have a set process, I have set image sizes, I have an action recorded in Photoshop to shrink my images to 24" x 36" and save them in the proper folder with the proper name and another to shrink them to 8" x 12" and place them in the proper folder with the proper name. I am meticulous, so when the first image imported into Photoshop and it was 18.898" x 28.346", un-cropped, I couldn't figure it out. The file size was still just as large, the resolution was still 72, I hadn't changed any settings in Lightroom or Photoshop, the ONLY thing I had done was install an update. It didn't make sense to me that with the pixel dimensions still being the normal size, all of the sudden the inch dimensions were smaller. And I did need to be able to have the capability for a larger print size if/when I do want to print.
I hope that I'm being clear now. I really was just trying to post a thank you initially. I hadn't expected all of this excess.
I apologize for the troll statement. It wasn't meant for you directly, it was more for the grouping of comments which in my opinion didn't seem to be useful for the discussion and were instead just baiting. I shouldn't have allowed my bad mood to permeate my own comment regardless. I am also sorry for any other statements I made which might have come across wrong. I was trying to be funny with my first comment about programmers, but it might not have come across that way. I hadn't expected the rude and unnecessary comment back which I received, and that's where the trollish comments came from. That's why I only responded to that person once, despite the string of poking posts.

Lightroom, Photoshop, Image and File Size | Adobe Evangelists - Julieanne Kost | Adobe TV

In this episode of The Complete Picture, Julieanne explains how LIghtroom determines the file size and resolution of a file when using the Edit in Photoshop command.
http://adobe.ly/YasSCQ

Have you tried, emptying your cache in your browser? Also, try a different browser ie chrome, safari, firefox. If your problem persists please send me an email with a detailed systme configuration spec to [email protected] and we can investigate offlist further.
Thanks!
Mike Burton
Adobe TV Administrator

IPhoto Book Colour Profiles & File Sizes?

I want to make a book in iPhoto. All my images are Adobe RGB. Do I need to change the colour profile.
I have a Mac with and Apple flat screen that has been colour balanced. So all the images look good. I am just concerned that they will be printed in a different profile and look rubbish.
What is the smallest file size and resolution that will look good.
Any other helpful advice.

Here's what Apple responded with when I asked them about book material and print quality:
"Thank you for contacting the Apple Print Products Customer Service.
I understand that you would like to know the printing process that is used and the color mode the files should be in, so you can better advise users in the iPhoto forum.
iPhoto version 4 or later, allows you to import and print files through the Apple Print Product service as RGB, grayscale, or CMYK color space. JPEG files with *RGB color space are recommended for best results.*
While iPhoto 2 can import files of various formats, including RGB color, grayscale, and CMYK, this version requires JPEG files with RGB color space when printing photos and books.
For more information regarding iPhoto 2, please visit the following article:
iPhoto: Color, Black and White Prints Appear Garbled or Distorted
For more information regarding iPhoto 5, please visit the following article:
http://docs.info.apple.com/article.html?artnum=165501
Here are some of the technical specifications for the books, cards, and calendars. I hope this gives you an idea about their quality and form.
BOOKS
All iPhoto books are printed using acid-free paper for long-lasting image quality. The photos are printed at a high resolution (300DPI if you use iPhoto 6). There is no external modification--such as sharpening or contrast adjustment--of the photos; what you see in the application is what is printed in the book.
Hardcovers Books
The cover is hard-bound and covered in linen. You select the linen color during the book-ordering process. The hardcover books have a solid, stiff binding that is glued and crimped. The internal pages, measuring 8.5 x 11 inches, are printed on McCoy 100# Text Gloss paper stock.
Softcover Books
The softcover books come in three sizes:
- Large 8.5 x 11 inches
- Medium 6 x 8 inches
- Small 2.6 x 3.5 inches
All of the softcover books have internal pages that are printed on McCoy 100# Text Gloss paper stock. The large softcover book has a white cover (Kromekoteplus Folding Cover, 16 point) with a cutout on the front that reveals the cover-page photo in the book. The covers for the medium and small softcover books have the cover image and title printed directly on the cover. All of the softcover books have a glued binding and feature a thick cover of McCoy 100# Cover Gloss paper stock.
CARDS
All cards are printed on McCoy 120# Silk Cover paper stock. The postcards measure 4 x 6 inches, and the greeting cards measure 5 x 7inches.
CALENDARS
All calendars measure 8 x 10 inches and are printed on McCoy 100# Silk Cover paper stock.
To ensure the best print quality, we have chosen to use Kodak NexPress technology. The press uses a dry toner, which is fused to the surface of the paper. Please see NexPress' site for more information:
KODAK NEXPRESS 2500 Digital Production Color Press
I hope you find this information helpful in answering questions on the iPhoto forum."
As for file size, keep the pixel dimension of the photo the largest you can. That will convert to the highest resolution possible when converted to the pdf for uploading and printing. iPhoto will assign a warning flag to those photos that end up with a dpi of less than 180 when added to a particular frame in the book. When added to a smaller frame the warning flag may go away. I've printed books with that warning and was happy with the results.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 08 libraries and Leopard. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.

PDF Optimizer decreases resolution, increases file size

I've noticed that the file size of my PDF files INCREASES now when I optimize them now that I've updated to version 7.0.7. The image resolution still decreases but the files increase significantly. For example, I have a 2 page document that originally was 3.2mb as a hi-resolution PDF. After I optimized it down to 72dpi for the images the file increased to 20.5mb!! I use this feature for documents that we publish on our web sites or to send a proof to a customer.
Is this just a new bug in version 7.0.7?

MAC G5, 1 gb RAM, OS 10.4
Indesign CS3
Acrobat version : at least 7.0.6 or newer (I'm not at work to verify the version)
I'm having the same problem. Doing a SAVE AS does not fix anything.
I have created a High Res PDF of a 56 page catalogue using Indesign CS3. I had to divide the document into two sections. The first file is 131 megs and the other 78 megs. I have to print high res for the client. Then I need to downsize the resolution so that I can send the catalogue to the client. Whether I choose PDF Optimizer or Reduce file..., the 131 megs PDF became 1.27 GB and not to mention the time wasted! This is enormous! I assure you that I have checked all settings for the PDF.
To counter the problem, I have to do a SAVE AS POSCRIPT file. Then I reduce the size using Acrobat Distiller. The 131 megs file then became 21 megs, which is what it should have been with Optimizer.
I don't understand what's happening with the Optimizer? It seems that there's an update version that has installed this bug. Which one? How to fix this problem? Is there anyone on this earth that knows what to do?

Publishing with a new screen resolution changes the EXE file size quite dramatically

Does anyone know why if you change the screen resolution and
the re-publish a movie why the resulting EXE grows in size quite
dramatically. Is there any way to avoid this to keep file sizes
down?
Thanks
Alastair

Yes it did help, in the respect that I felt confident that it wasn't anything to do with my project settings. The published files became corrupted when they were copied across to our intranet server.
thankyou
Alison McLeavy
Electronic Health Record Program
Mater Health Services
t: (07) 3163 6144 e: [email protected]
f: (07) 3163 2685 w: www.mater.org.au

Get texture file size, resolution and type.

Hi!
My script parsing every layer of AE Composition and creating the list of used textures (files).
Then copy files in one folder.
But I would also to compute overall size of all files and to warn user if he break the limit (for example, 10MB for all textures).
Can you advise me please the right way to get by AE script:
1. file size.
2. texture resolution.
3. texture color depth (is it 16 bits, 32 bits etc...)
4. actual type of the texture file (.tga, for example). I mean exact type detection, not extension recognition.
I've checked AE Scripting Guide, and tried to google it, but unsuccessfully
Is it possible in After Effect?
Thank you in advance!

The attributes to an AVItem still image (jpg for this example) are as follows:
var myItem = app.project.item(1);     //Assumes your still image file is the first item in the project window's list
myItem.comment
myItem.duration
myItem.file
myItem.footageMissing
myItem.frameDuration
myItem.frameRate
myItem.hasAudio
myItem.hasVideo
myItem.height
myItem.id
myItem.label
myItem.mainSource
myItem.name
myItem.parentFolder
myItem.pixelAspect
myItem.proxySource
myItem.selected
myItem.time
myItem.typeName
myItem.useProxy
myItem.usedIn
myItem.width
To access the source file attributes use:
myItem.file
You then can access file specifics:
myItem.file.absoluteURI
myItem.file.alias
myItem.file.created               //Returns date file was created
myItem.file.creator
myItem.file.displayName
myItem.file.encoding
myItem.file.eof
myItem.file.error
myItem.file.exists
myItem.file.fsName
myItem.file.fullName
myItem.file.hidden
myItem.file.length               //Returns the file size in bytes
myItem.file.lineFeed
myItem.file.modified
myItem.file.name
myItem.file.parent
myItem.file.path
myItem.file.readonly
myItem.file.relativeURI
myItem.file.type               //Returns the type of file

Check image details like resolution, dimensions, color mode, file format, file size and file name

I have 1000 images in a folder, i want to check their details like resolution, dimensions, color mode, file format, file size and file name into excel with nice user interface.
Pls help me, m just learning ABCD in VB.

The code in the file at the link below might give you a starting point. Firstly it gives you the opportunity to list all of the properties of a file type and then you can select the properties that you want and the second utility gives you the
opportunity to list the selected properties for all files in a selected folder.
Download and extract the file and open the file in Excel.
Click the first button List Meta Data for One File (Run first)
Navigate to and Select any ONE individual photo file. (Photo files because that is what you indicated you are working with.)
You will be presented with a list of the available properties for the file. Where the Item value is blank, that property is not recorded for the particular file. Different file types have different properties and it is also dependent on how the file
was created but generally if all of the files come from the same source then the same properties are recorded for all files from that source.
Now insert a Y in column D for all of the required properties. (Don't select any with the Item value blank)
Click the second button List Selected Meta Data for all Files in a Folder (Run after selecting the required properties).
Next select a folder where the files reside. (You might need to back up to the folder if dialog is blank because it will not show individual files because the code only allows Folders.)
You will be presented with a report listing all of the selected properties for all of the files in the selected folder.
The user interface is not that great but you can improve on that if you want to with a Userform as you get to know VBA a little better.
Download the file from here.
https://onedrive.live.com/redir?resid=C2A7A5912D3D17B0!273&authkey=!ANf8R0Xf0-h3wJ8&ithint=file%2czip
Regards, OssieMac

Importing photos resolution / file size

I am doing what is turning out to be a very long movie (1.5hrs). It contains a lot of imported photos, and I think it is those that has made it such a large file (they were taken on quite a high resolution so the file sizes are around 10 - 17 MB each). The entire project is 13GB and I have not finished it yet. Consequently I haven't enough memory to save a backup, and there is no way it will fit onto a DVD. So, my questions are:
Can I / do I need to reduce the file size of the photos I have already imported? (I have Ken Burns effects on all of them - if I can reduce the file sizes will I lose all this?)
What resolution do your photos need to be for them to be of good enough quality on a movie? (so that if I want to import any more I can bring them across at a lower resolution in the first place)
And finally how on earth am I going to get this project on a disc?! Please treat me gently with this one - I have read some of the previous forum answers and don't understand them
Thanks
Chelle Belle

Please treat me gently with this one ...
good morning, Chellebelle, like some coffee.. ?
'size'/better: resolution ..
a video is by standard ~640x480 pixel... you know, what a pixel is? a tiny dot. lots of dots = a picture.. lots of pictures = a video...
your stills are obviously larger, contain much more pixel. this is useful, when you apply lots of Ken Burns effects... you could lower the res in a pic processor (e.g. iPhoto allows in its Export dialog a 'lowering' or res)... but.. a lot of work, what for...?
size of project ..
video is, by standard, 13GB/h ... no workaround for this... aside: larger harddrives...
just a word about the 'speed' and 'health' of your Mac: make sure, you have allways 10 - 15 GB free on the internal drive (you could use a nice ext. harddrive for iM projects...). going under this recommendation 'brakes' your apps & OS, finally will bring it to a total halt.
size on DVDs ...
when iDVD detects your iM project in the 'Movies' folder (no need to share or send or export, in iM08 Apple axed that mostly useless option...), it will convert it. automatically. so, taadaahh, a ~60GB project (=lots of tape import) magically fits onto a 4.7 dvd-r ... called: converting/encoding...
if any more questions, don't hesitate to post here...
another coffee....?
PS: you get simple, firewire connected harddrives for ~100$ ... a must for the homevideo maker..

Reduce pages file size while maintain picture resolution

How do you have a small pages file size - <10mb - and still have a high resolution of my pictures in the doc

The two are rather mutually exclusive.
Quality, Number , Size - pick 2.
You have not told us how many images, how large in dimensions and whether you are going to commercial print or convert it to pdf and email/post it.
So it is hard to know the target.
You can trim away the unmasked portions of the images in Preview and bring them back into Pages.
You can ensure there is exactly the resolution you need in final size in the document, 150dpi for HG pdf for screen, or 300 dpi for print. Preview can adjust resolution.
If this is meant for screen and not print you can resave the images as jpegs as lower quality in Preview. Be aware that this is a compromise, smaller size is lower quality and ultimately noticeable. The process is lossy.
Vector (drawn) objects remain sharp and are very small compared to bitmap images, so use pdf or font graphics where possible.
Peter

I have a .mov file that is 59 gigs. Is there a converter that can reduce the file size with minor resolution loss so I can import it into final cut express?

I have a .mov file that is 59 gigs. Is there a converter that can reduce the file size with minor resolution loss so I can import it into final cut express?

Open the file in QuickTime Player. Then do Tools > Show Movie Inspector. What does it say for Format and FPS?
At 59GB, I suspect you have either a 4 hour DV video or a 1+ hour video that was converted to Apple Intermediate Codec. If it's either of those, you can import it directly into FCE provided you select the appropriate Easy Setup first. Your clips have to match the properties of the Easy Setup you are using.
If it's neither DV or AIC then you need to convert it to one of those codecs. (QuickTime/DV or QuickTime/AIC) Many people in this forum rely on MPEG Streamclip (it's free and works great).

File size vs resolution

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