Does Export Version reduces image quality?

Hi,
I got smaller file size when I "export version" at "original size". My master was jpeg of 5.1MB and I exported in jpeg format, I got 3.6MB. If I "export master", I do get 5.1MB. What does Aperture do to the jpeg image that reduces the file size?
Then I played around with "image quality", which is 10 by default. If I set it to 11, I got a file of 4.1 MB, still smaller than the original 5.1MB. Set it to 12 I got a file of 10.4MB. I am kind of confused. I guess the "image quality" relates to degree of jpeg compression, and a 12 setting means that Aperture compresses the jpeg image at a lower compression ratio than my camera? Does Aperture uncompress jpeg image and re-compress it when "export version"?
The bottom line is, how do I preserve image quality after adjustments? In other words, I would like to export at the same image quality as my original photo, or as close as possible (I assume Aperture reduces jpeg image quality a bit every time I apply adjustments to the image via export). Thanks much for your time.

Wanderzhuanyou wrote:
2) When I make adjustments in Aperture I actually work on the image Aperture produces out of the master file - which should be about 73MB in my computer memory as the size of the image is 2848 x 4272 and Aperture works in 16 bit.
Internally, Core Image (which Aperture uses) actually works in 32-bit, but your basic idea is right.
3) When I export, Apertures compresses this 73MB image (assume adjustments don't make much difference to the image size) to a jpeg file.
First the image will be reduced to the bit depth of your export preset. Image adjustments will make quite a difference to the final file size because areas of high definition detail and a large tonal range will both increase the file size for a given compression setting. So any sharpening, for example, will increase the file size.
As a test, export an image with no sharpening applied, then add some edge sharpening and export it again. You should see a noticeable difference in file sizes.
Correct?
Pretty much.
Ian

Similar Messages

Does reducing image size reduce image quality?

i 'm new to AI and also to this forum.
I know that enlarging and image can reduce image quality.
I'd like to know if reducing the image size (not in pixels, but in actual size),
will reduce the quality?
i have a Ai file that's 600x300, and need to reduce it to 300x120 my websie.
Before I convert it to a web format, I want to reduce this large Ai file to 300x120.
Will i still lose quality even if it's still an Ai file, before converting to web format???
thanks!!!!!

No it is however best to use save for the web to do so for the best optimization.
keep in mind the only lose in quality will be if some one grabbed it off of the website and tried to enlarge it or view it at a larger display size.
What you want to do is the best way of reducing the size.

!! Exporting SWF file in PDF reduces image quality.

Hello,
I have a file with many multi-state picture frames and buttons for them. I export it in pieces in SWF format, then I put the SWF's back in the document as a new layer and export as interactive PDF. Finally everything worked fine, except that PDF opens in a larger then normal zoom and when zooming in on pictures the quality is very poor I am guessing 72ppi at the intended zoom. I check the SWF file and see that its image quality is good when zoomed, so the problem is with the way the PDF has exported the SWF.
notes: I made sure the settings were to export at 300ppi and high image quality. When I take a single multi-state frame with its associated button and export to SWF then PDF the image quality is maintained.... however I have over 150 image frames, so I rather not export them individually. Please, please reply... any suggestions will be gratefully excepted.

edit your image in photoshop and experiment with various settings/size. there's no magic high quality small file size setting.
it's a trade-off. the higher the quality and the greater the image dimensions, the greater the file size. you have to decide where those are acceptable.

Does Photoshop Express change image quality of original file?

I use Photoshop Express (currently version is 3.4196) on my iPhone 5s to work on 24 megapixel files from my Nikon D7100 DSLR.
Does anyone know if saving the file reduces the image quality? what is the equivalent JPEG level to the Desktop Photoshop?
Tal

Hello
We are currently having a beta for Measurement Studio. This is a public beta where we let customers evaluate beta software versions of the next release of Measurement Studio. If you can go to the beta site ( http://ni.com/beta ) and sign up for the Measurement Studio beta, you can evaluate this behavior in the newer CWGraph control and see if it provides you the desired behavior.
The main reason you are seeing problems like this is that the ControlImage function selects 600 dpi to draw the image out, since this is a standard number that works with most printers.The 7.1 controls will now provide a ControlImageEx function that lets you select the dpi for the image. The standard for most screens is 96 dpi.
Please email the beta coo
rdinator( [email protected] ) once you have signed up.
I hope this helps
Bilal Durrani
NI
Bilal Durrani
NI

Iphoto 2 reduces image quality on iPad Air

I seems there is a significant reduction in image quality when editing images in iPhoto 2 (iOS7) on an iPad Air.
Not sure which component is the real problem ... and no, I'm not talking about file size (I know they are reduced) - I talk about dpi
So here's my old setup:
Nikon 5000 (image quality fine), iPad 3, Connection Kit for SD card, iPhoto on iOS 6
... with that setup I was able to save my edited pictures back to camera roll and the still had 300 dpi
My current setup:
Nikon 5000 (image quality fine), iPad Air, New Connection Kit for SD card (lightning), iPhoto 2.0 on iOS 7
... now my adited images only save back to the camera roll with 72 dpi!
As my DSLR and the SD cards are the same than before it seems that either
- Connection Kit
- iPhoto 2
- iOS7
- iPad Air
is the trouble maker!
While iPhoto seems the obvious source for the problem I had an experience that makes me think it could also be the iPad Air:
After creating a video with iVideo (with material from the iPhone 5) I saved this bakc to the camera roll and it was resized (resulting in cuts on the left and right edges) on the iPad.
Copying the same Video to iVideo via AirDrop on my iPhone 5 and savicg it to camera roll there resulted in a correct non-resized version.
So while I can easily live with that workaround for Video the reduction in images from 300 dpi to 72 dpi is signifikant and a real problem.
Anybody experiencing the same, any hints what I can do different to avoid thar reduction?

Just found an interesting article that may be the solution of my problem:
http://www.ilounge.com/index.php/articles/comments/icloud-photo-stream-and-image -quality/
As I brought together pictures from my DSLR and the iPhone I think I used the Shared PhotoStream folder for editing them in iPhoto 2. In the past I usually worked on the pictures separately (and directly form the Camera Roll) as I didn't mix so much DSLR and iPhone use.
That should explain it and I have to remember to edit directly in the camera roll and the next time.
So it's not a big deal ... I still have all the originals and will save them somewere in my Dropbox if I need them in higher resolution. At least I know I have to change my re-work behavior in the future.

Does exporting "current" provide highest quality/size jpegs?

What are the default settings of the "current" option in exporting photos from iPhoto? Is it the same as choosing jpeg at highest possible quality, best resolution, etc.? I would like to export my photos in iPhoto to an external drive and would like to preserve the highest quality jpeg size/format as originally imported into iPhoto from my camera. I understand that exporting as "original" would do this. However, I have created duplicates of photos and cropped them, and would like to preserve the cropping upon export. Exporting these cropped photos as "original" removes the cropping. Does exporting as "current" export the fullest size and highest quality jpeg possible (for the smaller/cropped image)?
Thanks for advance for any clarification on this.

Export a JPEG and set the quality setting to the highest value
LN

Reduce image quality (and file size)

Is there a simple way to reduce the quality of all backgroung
images ? (there are all bitmap images, about 3 MB each of them)
I imagine that by reducing the image quality, the file size
will be less huge...
But I wasn't able to find a way to do that...
(the option about JPEG quality in project/preferences has no
effect, because all background images are bitmap... )
Any idea is welcome !
Valérie

Hi Valerie
I have been doing some research on this -- the issue of file
size (relating to both .cp and .swf) crops up a lot on this forum,
so I wanted to find out which were the critical factors relating to
images.
My findings show that there are two critical factors:
-- Slide Properties: Quality (High, Standard, JPEG,
Optimized)
-- Format of original image file (used for slide background
or inserted image object)
To summarize the results of my testing:
Slide Quality
Changing the slide quality from High
to Standard or JPEG makes little or no difference to the size of
the .cp file but can *significantly* reduce the size of the
.swf
This is an especially useful way of
dealing with the very large .swf file sizes caused by importing PPT
slides
A .swf consisting entirely of
imported PPT slides with complex backgrounds may be reduced to less
than 10% of its original size by changing the quality setting for
each of the slides to JPEG and using a JPEG image quality setting
of 75%.
Format of original image file
For complex images such as photos,
the best image file format to use is (oddly) .bmp -- although it
results in a larger .cp file than other file formats (such as .jpg
or .png), it generates the smallest .swf output.
The benefit of using the .bmp format
is less marked if you have set slide quality to Standard instead of
High, but it can still cut the file size of the .swf output by up
to 50%
For slides using a quality setting of
JPEG, there appears to be no difference in resulting .swf file size
between .bmp or any other image file format
A final comment: it is interesting to compare the size of the
.cp and resulting .swf for different Captivate projects. There is
typically an assumption that the .swf file will be smaller due to
compression. However, this is not always the case. For example, I
tested one project that used High slide quality and images that had
been inserted from .jpg files -- the generated .swf file was over 4
times larger than the .cp file. However, when I changed the quality
setting for all slides to JPEG, the .swf file reduced to less than
50% of the size of the .cp file.
I hope this information is helpful -- please contact me if
you'd like to see the detailed test data.
Best regards,
-Matthew Ellison

Firefox mage quality and resolution was superb when I used XP and Vista. Now that I have Windows 7, however (with the Firefox 3.6.3 version), the image quality and resolution is poor. Please help me!

I am using the Firefox 3.6.3 version with my new Windows 7 operating system. When I used all the previous Firefox versions in my XP and Vista operating systems, image quality and resolution was excellent! However, now that I have upgraded to Windows 7 and Firefox 3.6.3, the image quality and resolution is poor (unacceptable for downloading purposes).
== This happened ==
Every time Firefox opened
== I first activated my new computer and installed the Firefox 3.6.3.

All my images are pixelated in firefox 3.6.3
http://www.dcgdcreative.com
Not only on my site but on most sites I view.
The issue is not solved by resetting the zoom text view (ctrl+0)
The issue is not resolved by starting in safemode with add-ons disabled
The problem seems to only affect .jpeg files and only on Windows 7 on my desktop; as I have viewed several sites using windows XP with my laptop, no issues.
I had the same issue with IE8 and was able to fix the problem with by setting up the compatibility view for all sites. Issue fixed no problems at all. But nothing similar for firefox?
Whats the deal?

Reduced Image Quality

So... I've perused through looking for help on this, and it seems like many people have had this problem, but I'm not sharing in their successes.
I have an image (a group photo) that I'd like to include in a sequence (DV NTSC), and when I view it in the browser it looks stellar, but when I edit it into the timeline it looks pixelated and blurred.
I know that you're not supposed to judge image quality by looking at it in the canvas, but shouldn't an EXPORTED DV sequence look better? It doesn't.
Rendering the image doesn't help (any rendering should occur when the whole sequence is exported anyway); it clearly has something to do with the inherent reduction of quality when the high-res image is edited into my DV sequence. I've tried editing the image to an uncompressed sequence as a test with no luck.
I have some titles whose quality is also degraded when they are edited into the sequences (and exported).
I'd love some help with this.

DV degrades the photo. If you have a 3000x2500 image at 600dpi, you drop it into a FCP DV sequence it becomes 720x240 at 72dpi, and adopts the DV 5:1 compression.
Nothing you can do to avoid this...except for when you lock picture then take your DV sequence, drop it into a DV50 or uncompressed 8-bit timeline and render. Your picture will look much better.
But that only works if you are making a DVD. If you go back to DV tape then there is nothing you can do.
Shane

Does the ipad reduce the quality of photos that are imported using the SD to lightning connection kit?

Hi everyone. I'm hoping you can help.
I'm currently travelling and my intention is to take photos using my camera, import them to my iPad using the lightning to SD connector and then upload the photos to cloud storage for safe keeping.
The problem I've found is when I import photos to my iPad the file size, and therefore quality of the photos, is reduced. I know this because I have tested uploading the same photo to Mega.co.nz cloud storage using both the iPad and a Nexus 4 phone - the iPad uploaded the photo at file size 2.9mb and the Nexus uploaded the photo at the original file size of 5.8mb.
Can this issue be resolved?
Thanks in advance,
Ben

Sorry, issue resolved.
For those that may be having similar problems, the issue is the Mega.co.nz app that was created for apple products. It's possibly a bug that means it either compresses the file or does not accurately record the file size. I will report the fault to Mega.
Ben

Cropping Photo appears to reduce image quality - but maybe not

Hi,
This morning I took some pictures of hoar frost, and then emailed a couple of them to a friend. I chose the actaul image size which said it was 3.3MB. Tonight, I was going to email them again to have them printed, so I cropped the picture (with the built in editor) and constrained it to 4x6, and then emailed it. Before it sent, I noticed "actual size" was about 850KB - at least that's what it said. That made me nervous considering it was going to be a print quality photo. If it was true, that would have been a significant resolution loss.
I pulled the email that I had sent earlier in the morning - which said it was 3.3MB - and sent it to myself. I then sent myself the 846KB picture and pulled them both up side by side on my large computer screen and they look identical as far as resolution.
Is this just a weird fluke or have other's experienced this as well?
Thanks!

No it is however best to use save for the web to do so for the best optimization.
keep in mind the only lose in quality will be if some one grabbed it off of the website and tried to enlarge it or view it at a larger display size.
What you want to do is the best way of reducing the size.

Exporting Versions to image with meta data

Hey folks, I'm looking to find an Aperture Plugin that will export processed images (versions) with all its associated meta data in XML format.
I intend to use this exported data in a custom application - I've seen export plugins to Picasa, and others, but so far they just seem to handle the images alone.
Can anyone suggest a location to where I might find such a beast? (or is anyone in development of this? - I'm very surprised it isn't included as a built-in feature.
Thanks in advance,
Ted

Has anyone had success with Ubermind's Aperture to FileMaker?
I've had it work once or twice, but usually, despite rigorously following their apparently simple instructions, Aperture refuses to recognize the database.
Would be pleased to know if there's something they haven't been clear about in their instructions.
Regards,
Brent

Rendering reduces image quality. Confused

I'm working in P Pro 7.1 with GH3 footage shot 72mbps/All-intra MOV files.
I made a sequence from a clip (settings posted below).
A clip in the sequence has the yellow render bars and plays back very nicely.
But if I render it, a whole bunch of artifacts are introduced. It looks awful.
Changing to max render quality does nothing.
I also don't understand why these are the settings that premiere generates from the clip.
Why would this happen?

Well, not in this exact instance, but I will as I build the sequence and when it comes time to export.
But even if I don't need to, I still don't understand this.

Does Leopard produce better image quality in Aperture than Tiger?

Reason I ask is because of this statement by Apple;
"Leveraging the next-generation RAW image processing in Mac OS X Leopard, Aperture 2 delivers images of astounding quality, offering superb color fidelity, increased shadow detail, reduced noise, and advanced highlight recovery."

... unless you play with the midtone contrast and get caught by the "solarisation" bug.
Cheers,
k.

Does iweb 06 reduce image size, or only compress it?

my concern is the final file size of my site, and the time it takes for people to upload pages with my artwork photos. when I drag an image from photoshop onto my iweb site, it automatically shrinks the image, and then i expand it to fit my formatted pages.
but when i click on "original size" in the inspector, it shows the full size image, which is much larger than what i want,... and I assume this is the actual pixel size on the site. so, do i have to shrink the image BEFORE i drag it into iweb, or.....not?
wildlife

Hi Roddy,
I checked out your website for PhotoStuff. How did you make the "Don't steal...Get your own" message appear when you click on the photo? I am intrigued! I am new to making my own website (with iWeb) and I am trying to prevent "click & steal" downloads. I'm also having trouble figuring out how to configure file sizes in iPhoto...etc. I don't have Photoshop ..yet.
Thanks!
Sweet Sis

Does Export Version reduces image quality?

Similar Messages

Maybe you are looking for