Reducing JPEG file size

I have an image approx. 280 X 80 pixels, very simple, few colors... at 72 dpi. It weighs 180K as a jpeg. I'm trying to reduce it to 15-30 K.
I tried saving it to the lowest jpeg quality and I can't get it below 150K. What am I overlooking?

I know I'm on the SDK forum.
My problem is a SDK problem.
I arrvied to open the save dialog but I don't arrive to set options in this dialog.
How to set options in save dialog to choose in a first time the jpeg format, and in a second time options of the jpeg format ?
Thanks

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Can I resize photos and reduce JPEG file sizes by using Photpshop Elements?

Can I resize photos and reduce JPEG file sizes by using Photpshop Elements?

Go to Image>Resize>image size.
For purpose of web posting, go to File>save for web.

Sips --embedProfile is reducing jpeg file size by half

I'm trying to use sips to embed the sRGB color profile to some jpegs, and when I do so, the resulting file size is always about 1/2 the original size. If I open the jpegs in Preview and embed the color profile there and save, there is a negligible file size difference. Any ideas as to what is going on when sips embeds the profile?

jphelp32 wrote:
I wouldn't expect sips to re-compress the image if I'm only adding the color profile and no other modifications.
I'm pretty confident it is re-compressing the JPEG. Here's how I tested it:
1. Add a color profile to a JPEG, just like you did.
2. Take that JPEG and load it, along with the original JPEG, into Photoshop in the same file, in different layers. Change the mode of the top layer to "Difference" and flatten the file. The picture looks like it's all black, but it's not.
3. Use a tool, like the levels adjustment, to increase the contrast. Where the two pictures differ, there will be "noise" in the picture.
However, if I duplicate a JPEG in the Finder, import the Finder duplicate and the original, and repeat steps 2 and 3, I get a black picture, no noise in it at all regardless of how much I mess with the levels.
You can change the compression level sips uses by using "-s formatOptions" and then one of low, normal, high, best , or a numerical percentage. That will also change the size of your file...
charlie

A simple and free way of reducing PDF file size using Preview

Note: this is a copy and update of a 5 year old discussion in the Mac OS X 10.5 Leopard discussions which you can find here: https://discussions.apple.com/message/6109398#6109398
This is a simple and free solution I found to reduce the file size of PDFs in OS X, without the high cost and awful UI of Acrobat Pro, and with acceptable quality. I still use it every day, although I have Acrobat Pro as part of Adove Creative Cloud subscription.
Since quite a few people have found it useful and keep asking questions about the download location and destination of the filters, which have changed since 2007, I decided to write this update, and put it in this more current forum.
Here is how to install it:
Download the filters here: https://dl.dropboxusercontent.com/u/41548940/PDF%20compression%20filters%20%28Un zip%20and%20put%20in%20your%20Library%20folder%29.zip
Unzip the downloaded file and copy the filters in the appropriate location (see below).
Here is the appropriate location for the filters:
This assumes that your startup disk's name is "Macintosh HD". If it is different, just replace "Macintosh HD" with the name of your startup disk.
If you are running Lion or Mountain Lion (OS X 10.7.x or 10.8.x) then you should put the downloaded filters in "Macintosh HD/Library/PDF Services". This folder should already exist and contain files. Once you put the downloaded filters there, you should have for example one file with the following path:
"Macintosh HD/Library/PDF Services/Reduce to 150 dpi average quality - STANDARD COMPRESSION.qfilter"
If you are running an earlier vesion of OS X (10.6.x or earlier), then you should put the downloaded filters in "Macintosh HD/Library/Filters" and you should have for example one file with the following path:
"Macintosh HD/Library/Filters/Reduce to 150 dpi average quality - STANDARD COMPRESSION.qfilter"
Here is how to use it:
Open a PDF file using Apple's Preview app,
Choose Export (or Save As if you have on older version of Mac OS X) in the File menu,
Choose PDF as a format
In the "Quartz Filter" drop-down menu, choose a filter "Reduce to xxx dpi yyy quality"; "Reduce to 150 dpi average quality - STANDARD COMPRESSION" is a good trade-off between quality and file size
Here is how it works:
These are Quartz filters made with Apple Colorsinc Utility.
They do two things:
downsample images contained in a PDF to a target density such as 150 dpi,
enable JPEG compression for those images with a low or medium setting.
Which files does it work with?
It works with most PDF files. However:
It will generally work very well on unoptimized files such as scans made with the OS X scanning utility or PDFs produced via OS X printing dialog.
It will not further compress well-optimized (comrpessed) files and might create bigger files than the originals,
For some files it will create larger files than the originals. This can happen in particular when a PDF file contains other optomizations than image compression. There also seems to be a bug (reported to Apple) where in certain circumstances images in the target PDF are not JPEG compressed.
What to do if it does not work for a file (target PDF is too big or even larger than the original PDF)?
First,a good news: since you used a Save As or Export command, the original PDF is untouched.
You can try another filter for a smaller size at the expense of quality.
The year being 2013, it is now quite easy to send large files through the internet using Dropbox, yousendit.com, wetransfer.com etc. and you can use these services to send your original PDF file.
There are other ways of reducing the size of a PDF file, such as apps in the Mac App store, or online services such as the free and simple http://smallpdf.com
What else?
Feel free to use/distribute/package in any way you like.

Thanks ioscar.
The original link should be back online soon.
I believe this is a Dropbox error about the traffic generated by my Dropbox shared links.
I use Dropbox mainly for my business and I am pretty upset by this situation.
Since the filters themsemves are about 5KB, I doubt they are the cause for this Dropbox misbehavior!
Anyway, I submitted a support ticket to Dropbox, and hope everything will be back to normal very soon.
In the meantime, if you get the same error as ioscar when trying to download them, you can use the link in the blog posting he mentions.
This is out of topic, but for those interested, here is my understanding of what happened with Dropbox.
I did a few tests yesterday with large (up to 4GB) files and Dropbox shared links, trying to find the best way to send a 3 hour recording from French TV - French version of The Voice- to a friend's 5 year old son currently on vacation in Florida, and without access to French live or catch up TV services. One nice thing I found is that you can directly send the Dropbox download URL (the one from the Download button on the shared link page) to an AppleTV using AirFlick and it works well even for files with a large bitrate (except of course for the Dropbox maximum bandwidth per day limit!). Sadly, my Dropbox shared links were disabled before I could send anything to my friend.
I may have used a significant amount of bandwidth but nowhere near the 200GB/day limit of my Dropbox Pro account.
I see 2 possible reasons to Dropbox freaking out:
- My Dropbox Pro account is wronngly identified as a free account by Dropbox. Free Dropbox accounts have a 20GB/day limit, and it is possible that I reached this limit with my testing, I have a fast 200Mb/s internet access.
- Or Dropbox miscalculates used bandwidth, counting the total size of the file for every download begun, and I started a lot of downloads, and skipped to the end of the video a lot of times on my Apple TV.

How can I reduce the file size of a pdf when exporting?

I don't want to just choose between high quality print or smallest file size.
I want to export it from 60MB to 40MB.
Can I do this manually? When I use smallest file size the quality is too low and the content looks bad.
But high quality print exports my PDF at 60MB which is too big.

You cannot simply legislate the size of a PDF file. If you content is primarily text and vector, there is not much at all you can do to reduce PDF file size other than to cut out content. Otherwise, the only other variables are those of downsampling and compressing the raster images from your content.
You must be very careful in choosing the PDF export settings. The “smallest size” settings yield PDF files that realistically really are not fit for printing and may mess up any CMYK colors. The “high quality print” and “PDF/X-4” settings yield best print output, but yield the largest PDF files since they do less image resolution downsampling and only the maximum quality lossy JPEG compression.
I would recommend that you start with either the “high quality print” or the “PDF/X-4” settings and make a custom set of export settings. Assuming that you aren't going for offset or gravure printing, change the color image and grayscale image downsampling values from 300 and 450 to either 200 and 275 or no less than 150 and 225. If that doesn't give enough file size reduction, change the compression image quality from “Maximum” to either “High” or no less than “Medium.” Beyond these changes, you may end up with PDF files that will neither print nor display with any reasonable quality.
- Dov

How do i reduce the file size of a picture?

I am trying to reduce the file size of a picture? It is 1.7MB and I need it to be smaller.
Help?

File -> Export
The two settings that most affect the filesize are Jpeg Quality and Size.
This User Tip
https://discussions.apple.com/docs/DOC-4921
has details of the options in the Export dialogue.

Reducing PDF File Sizes

We create and use numerous pdf files, some with fill-in fields and some without. Is there a way to reduce the file size without adversely affecting response time to open the file? Some of us are running Acrobat Professional version 7 and others are running version 8. Some of us have Windows XP and some have Windows 2000.
Any help you can give us would be greatly appreciated.
Thanks.
Ken K

>I thought that if a file was compressed in some way that it might take some time to decompress the file.
I see - entirely reasonable to think that. However, almost every PDF
is already compressed using technologies like ZIP or JPEG. When you
reduce the file size you are usually doing some combination of
* reducing image resolution
* using more agressive JPEG compression
* deleting stuff you can live without
So this doesn't affect the load time.
JPEG 2000 compression is stronger and a bit slower, but probably
nothing to worry about, especially if you don't have high resolution.
Aandi Inston

How do I reduce the file size of my pictures

I am running out of space on my hard drive and notice that my iphoto library contains over 5000 pictures and is about 15GB. This is about 3MB per picture. I checked and lots are over 10MB. Most pictures I only print in 10x15, the largest i ever printed was A4 sized. I guess i don't need to keep such large files. These cameras are now set to make pictures with too many pixels I guess...
does anyone know of a way to reduce the size of all my picture files?
thanks
p

1. Reducing the file sizes of your pictures will not just reduce their quality when you print, it wll also negatively affect their quality no matter how you view them. Remember the screen quality on your next mac will be better than this one, and even more so on the one after.
2. The simplest solution to a size issue is to store the Library on an external disk, You can do this with iTunes and iMovie too.
3. If you really want to reduce the quality of your photos then there is no way to do that in iPhoto. Here's what you'd have to do:
Export the Pics from iPhoto (File -> Export) and in the Export dialogue make your choices on Jpeg Quality (the amount of compression used) and size (the dimensions)
Delete the pics from iPhoto
Import the ones who have exported back to iPhoto.
Give away your camera and get a lower quality one
Regards
TD

How can I reduce the file size when saving a psd as a pdf

I have a psd with graphics and text, it is 8.5 x 11, 300 ppi
I flatten the image and go to save as .pdf I un-check all of the options in general.
In compression, I have tried a dozen different combinations and the way I've found to get a document that is not pixelated or blurry is to use jpeg 2000 > lossless or jpeg > maximum.
So I have a high quality document but the file sizes are around 900 kb.
I have downloaded other people's documents of the exact same type and size (8.5 x 11, 300 ppi) that I am making and viewed them in Photoshop, they are not pixelated or blurry and their file sizes are 300 kb or even less than 200 kb
How are they doing this?!

Delete all unused, invisible layers.
Sometimes zip compression is better than jpg compression (in the pdf output settings). Zip is lossless, and works better with non gradient colour or no images.
Flattening the image before you save it to pdf can reduce the file size if you are using jpg compression.
Post a preview of your pdf and we can comment further on how to reduce the file size.

How do I reduce photo file size in Pages?

I am colaborating on a report that contains photos, which I want to exchange with my colleague via email. It's too big as is, but if I choose the Reduce File Size option, Pages over reduces and the photos become blurry and pixelated. If there a way to find a happy medium within Pages, and not be exporting to a pdf? Thanks in advance for any help.

Question asked and answered several times.
Adjust the picture files to fit your needs before inserting them in a Pages document.
My own scheme is :
build a draft document in which I insert the original pictures (tiff or png)
When the document's layout is OK, grab the dimensions of resized pictures.
Use a tool dedicated to pictures edition (they are numerous even if you want a free one).
to crop the pictures.
Re sample the cropped pictures with a rez between 80 dpi and 300 dpi according to your needs.
Then and only then, save as Jpeg to reduce the files sizes.
Remove the pictures embedded in you doc and insert the edited ones.
It may be useful to re-start from scratch and copy paste the text components if you applied masks to crop the pictures during the first step.
Yvan KOENIG (VALLAURIS, France) mardi 4 octobre 2011 15:38:27
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
Please : Search for questions similar to your own before submitting them to the community

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I have been retouching some pictures for use in a photo book but notice that each time I do so, the file size decreases fairly significantly e.g from 4MP to 2MP.
Is there a way I do minor retouching to a photo without reducing the file size/quality?
Thanks in advance

Where are you seeing this size reduction? What format are the original photos?
For example when you edit a RAW photos you create a JPEG modified version which is much smaller - one I just did went from 17 MB as RAW to 4.4 as a JPEG -- you could save as a TIFF but to me that is not worth the space loss - I seriously doubt that you will ever do anything that you can see the difference in quality between a TIFF and JPEG of yoru images
LN

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PS Touch only permits JPEG and PNG when exporting directly to your device. Exporting by "sharing" (rather than "save to") via a service like Dropbox permits the full range of file formats (JPEG, PNG, PSD & PSDX).
Not sure what's causing the file to shrink so considerably. My projects, provided I kept the same dimensions, are generally the same size as my originals when I save locally. (I'm on Android.)

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I am trying to reduce the file size of a document in Pages. It has many jpegs. When I use File>Reduce File Size or Format>Image>Reduce File Size, I get stuck at "Determining potential file size reduction ..." and it will go no further. Selecting "Cancel" or "Reduce" has no effect. I need to to a forced quit to get anywhere. Thanks

To use the Reduce file size isn't the best way to do it but the easiest if it works. You probably have an image clogging the process.
Instead reduce the image sizes in a graphical application suited for it. Do the cropping of the images first if you haven't done that already. Then down size the resolution to about 300 dpi if you want to print the document images. If it is only going to show on the screen you can down size the images to about 75 dpi.

JPEG File Size Help!

Any tips (or software) on how to reduce the file size of
JPEGs without compromising the quality. I have a flash ad that has
3 screens with photos, but clients needs the .swf file to be under
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I've done the following:
* cropped photo down to actual size
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There is a flyout option in the PS Save for Web dialogue (top right)
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Email-to facilitate emailing a photo by gmail or AOL, I reduce the file size. Is it better to reduce the image size or increase the jpg compression?

To facilitate emailing a photo by gmail or AOL and avoid overwhelming the recipient's screen, I reduce the file size. Is it better to reduce the image size or increase the jpg compression? I have been making a duplicate image of 35 MB and reducing the image size to 8"x12" at 72 resolution giving a file size of 1.4 MB. Then I SAVE AS a jpg of medium compression giving a file size of about 111 KB. Overkill?

Go to File>save for web.
I usually make the long side 800 px
At the bottom of the dialog, check "constrain proportions."
At the top, select JPEG in the dropdown for the file format.
All the work is done for you! 72px/in is ok for web work. 240-300px/in is the recommended range for printing.

Reducing JPEG file size

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