JPEG, Lossy Here?

I have read the messages in the forum but I have a couple of basic questions about Photoshop Elements 4.0:
1. After opening my Organizer and editing a few photos, saving the edited photos as PSD, will the closing/exiting of Elements affect the quality of any of the JPEG photos in the Organizer since I am closing them as opposed to saving them?
2. Will moving a JPEG from one folder to another folder result in a loss of quality when I close/exit the program?
Thanks.

Ed,
Neither of your scenarios will cause any change to the original jpeg.
The damage is done only when the file has to be recompressed and that isn't happening in either case. Even copying a jpg from one folder to another doesn't do anything more than copy the already compressed bits as they are.
Bob

Similar Messages

Jpeg lossiness

Dear All,
If all you do is rename a jpeg and save it, is there lossiness? What if you are using a batch rename process? Also, if all you do is make a copy of the original, is there lossiness in the copy?
What if you open the image in Ps CC using the new camera raw filter, make a copy of the background as a layer, convert to a smart object, make the edits then save under the original file name? I'm trying to figure out if I screwed up some very large files (e.g. 50MGs). I do have all the untouched orginals so it's not a disaster, just a lot of work that maybe went awry.
Chris

irislake wrote:
Dear All,
If all you do is rename a jpeg and save it, is there lossiness?…
If you OPEN it, then YES, no exceptions—ever.
Anytime you open a JPEG, the image is decompressed with all the losses it suffered when it was compressed originally. When you save or re-save it, the image is re-compressed once again and the loss is compounded, cumulative.
I avoid JPEGs as much as I can and generate a JPEG copy only when specifically forced to.
Obviously, if you just re-name the file label, you're not opening and re-compressing the file, so no loss there.

How to create a lossy JPEG 2000 picture?

Hi there.
Now I am working on an app. to compare the quality between a traditional JPEG and the new JPEG2000 format.
Although I did not find the ways to encord JPEG2000 format in basic JAI, another API jai_imageio-1_0_01 does provide the way to do it.
The default parameter in the J2KImageWriteParam is for a lossless encord, the result is perfect, of course. But more importantly, I want to try the lossy ones so that I can reduce the outstream size.
The problem is here, when I just change the encoderate throught the setEncordingRate method, the result is terrible, which I am sure is a failure. I do not know why. There are many parameters I can set, does it mean I should change several at the same time, not just the encodingrate? And if I change the writeparam should I change the readparam too to decord?
My sample code is following, in it, I cpatured the screen as the source and write it into .jp2, then read it out to show.
Please help me, thanks a lot.
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import java.io.*;
import javax.media.jai.JAI;
import com.sun.media.imageio.plugins.jpeg2000.*;
import javax.imageio.stream.*;
import javax.imageio.ImageIO;
import com.sun.media.imageio.plugins.jpeg2000.J2KImageWriteParam;
import javax.imageio.*;
import javax.media.jai.operator.AWTImageDescriptor;
import javax.media.jai.RenderedOp;
class screen18 extends Frame{
     BufferedImage sh=null;//for Captured screen
     Rectangle screenSize;
     BufferedImage bi= new BufferedImage(1024, 768, BufferedImage.TYPE_INT_ARGB);
     public screen18()
          addWindowListener(new WindowAdapter(){
          public void windowClosing(WindowEvent e){
          System.exit(0);
          screenSize = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
          sh= new BufferedImage(1024, 768, BufferedImage.TYPE_INT_ARGB);
          //Capture the screen
          try{
               sh = (new Robot()).createScreenCapture(screenSize);
          }catch(Exception ex) {System.out.println(ex);}
     ImageWriter writer = (ImageWriter)ImageIO.getImageWritersByFormatName("jpeg 2000").next();
     ImageOutputStream ios = null;
     try {
          OutputStream os1 = new FileOutputStream("j2000.jp2");
          ios = ImageIO.createImageOutputStream(os1);
          writer.setOutput(ios);
          J2KImageWriteParam paramJ2K = new J2KImageWriteParam();
          //You can set whether it is lossy here
          //paramJ2K.setLossless(false);
          //paramJ2K.setFilter("w9x7");
          //paramJ2K.setEncodingRate(Double.MAX_VALUE*0.9);//key point
          System.out.println("JPEG2000 Parameter: ");
          System.out.println("getCodeBlockSize: "+paramJ2K.getCodeBlockSize());
          System.out.println("getComponentTransformation: "+paramJ2K.getComponentTransformation());
          System.out.println("getEPH: "+paramJ2K.getEPH());
          System.out.println("getLossless: "+paramJ2K.getLossless());
          System.out.println("getEncodingRate: "+paramJ2K.getEncodingRate());
          System.out.println("getFilter: "+paramJ2K.getFilter());
          System.out.println("getProgressionType: "+paramJ2K.getProgressionType());
          System.out.println("getSOP: "+paramJ2K.getSOP());
          System.out.println("getWriteCodeStreamOnly: "+paramJ2K.getWriteCodeStreamOnly());
          RenderedOp renImage7=AWTImageDescriptor.create(sh,null);
          IIOImage ioimage = new IIOImage(renImage7, null, null);
          writer.write(null, ioimage, paramJ2K);
          ios.flush();
          writer.dispose();
     }catch (IOException ex) {System.out.println("Mistake is here when produce a J2K");}
          ImageReader reader1 = (ImageReader)ImageIO.getImageReadersByFormatName("jpeg 2000").next();
     try {
          ImageInputStream iis = ImageIO.createImageInputStream(new File("j2000.jp2"));
          reader1.setInput(iis,false,true);
          J2KImageReadParam paramJ2K1 = new J2KImageReadParam();
          System.out.println(paramJ2K1.getDecodingRate());
          paramJ2K1.setDecodingRate(Double.MAX_VALUE*0.9);
               bi = reader1.read(0, paramJ2K1);
          reader1.dispose();
     }catch (Exception ex) {System.out.println("Mistake is here when extract a J2K");}
     public void paint(Graphics g)
          g.drawImage(bi,0,0,this);
     public static void main(String args[])
          screen18 s = new screen18();
          s.setSize(1024,768);
          s.show();
}

Hi Wayne,
if you take a JPEG image from your file system as a source instead of the Robot, the lossy encoding works:
sh = ImageIO.read((new File("C:\\Images\\Bild0.jpg")));instead of
sh = (new Robot()).createScreenCapture(screenSize);and later...
paramJ2K.setLossless(false);
paramJ2K.setFilter("w9x7");
paramJ2K.setEncodingRate(Double.MAX_VALUE * 0.5);//key pointBest regards
Dominic

Difference between jpeg settings

hi,
i want to know the purpose of jpeg quality setting in publish
settings box. what's the purpose of that setting? and whats the
difference between this setting and bitmap properties settings in
library? the livedocs on macromedia states : NOTE
JPEG Quality settings that you select in the Publish
Settings dialog box do not specify a quality setting for imported
JPEG files. You must specify a quality setting for imported JPEG
files in the Bitmap Properties dialog box.
i am a little confused because of this.
any help would be grately appreciated.
thanks
gaurav

There are many options and yes it is confusing.
Assuming Bitmap properties calls for JPEG/Lossy Compression:
1. Publish window - whatever you put in here is the default.
That number is used if nothing else overrides it.
2. Bitmap Properties setting - if you put a number in there,
it will override the default.
3. Use imported data: You imported a JPG, Flash won't mess
with it at all, it wil just export the same data.
Note that it is a bad idea to import a JPG and then
recompress it a different way for export. You get double artifacts
that way.

PS created JPEG's won't open after being emailed

first, apologies if this has been discussed here before, but the search on the adobe forums is dreadful at best, so i wasn't able to find the answer that way...now...
i'm working in CS2 on the only Mac in my company of 100+ doing design work (print ads, web ads, etc) The majority of the other systems here (and 100% of the ones in my department that i work directly with) are running Windows XP.
When i save files created or modified in PS as JPEG files and email them to others, they are unable to open them - in Image Preview the error is "unable to generate preview", in other programs, it just fails to show up. HOWEVER, if I transfer the JPEGs over our network, the problem doesn't occur. Also, if i save them as PDF's, they open fine. While this is a workaround, it can't be permanent, because not everyone is on the network, and i can't be running into this issue when i email files to people outside our business.
The only solution that one of my Windows-using colleagues has come up with is to open the faulty JPEG with her version of PS (which works fine, making me think that the file itself hasn't been corrupted through the email) and simply re-save it. Also, an annoying workaround, and she has the only other copy of PS here, so it's not like anyone else can do that.
So, any thoughts? Maybe simply a cross-platform issue? Is there a setting i'm missing in my JPEG options? Oh, i'm running OS 10.4.11 on a 2.3G Intel iMac if that helps...
thanks in advance
-gardner

For the record:
Jim Jordan aka Jim Oblak aka deafeningechochamber. aka Ken Vogel, aka Cleveland Steamer, etc., has just changed his Jim Jordan identity to Zaldidun, so that all posts by Jim Jordan appear as authored by Zaldidun. [E.g. posts #1, #3 and #5 in this thread. Other posts elsewhere.
This is a blatant attempt to enrage me as Zaldidun is a Basque word I have used in the path to a server space where I keep a few inconsequential images.
Just keep that in mind.

Batch convert multi-page hi-res pdf to lower-res jpeg

I'm doing what one would imagine to be a very simple batch process. I have about 40 issues of a 100 page magazine in hi-res pdf with crop marks. Each issue is divided up into about 35 multipage pdf files. I need to import each page into photoshop, crop off the crop marks, reduce the size 50% and save as jpeg.
Here is my problem:
Every time it opens the file it pauses and asks me which page to open. I need the batch to process EVERY page automatically. How do I do this?
Any advice?

It all depends if you could create an action to do the crop and resize, if you can do that then you could use this PDF Processor..
http://www.ps-scripts.com/bb/viewtopic.php?t=1882

Strange "unsupported format" error with jpegs

I'm trying to help a friend who is running the most recent version of Aperture 3 (all updates installed). When we import a single jpeg from her hard drive, it comes into Aperture with the "unsupported format" icon and an exclamation mark where the preview should be. Double clicking the thumbnail opens the same error in the viewer, so it's not just an issue of the preview. The files themselves are fine and are named with the proper extension.
If we import 2 images at the same time, one comes in okay, and one does not. Importing 3 at a time yeilds 2 good, one bad. So, essentially, there is always just one image that is bad. It will successfully import the very same file that it rejected moments before as long as it is not the only file being imported. Make sense?
This is not a RAM or hard drive space issue. The only thing I think it may be is that she is running 10.6.7 (on a quad core Mac Pro). I'm wondering if the OS update to 10.6.8 resolves this particular issue. I will definitely update it as soon as I can, but I need to know if it could be something else. (I'm not with the machine now, and I need to bring the solution with me because she is not at a location where she can download the update herself.) Has anyone else seen this behavior before?
Thanks in advance for any helpful suggestions. This has me stumped!

Upgrade and then see. 10.6.8 is the current minimum requirement.
http://www.apple.com/aperture/specs/

JAI TIFF - JPEG colour problem

Hi all...
I want to use JAI to convert from TIFF to JPEG. Here is my test program:
import javax.media.jai.JAI;
import javax.media.jai.RenderedOp;
import java.awt.image.renderable.ParameterBlock;
public class Test {
     public static void main( String[] args ) {
          String srcFile = args[0];
          String dstFile = args[1];
          RenderedOp op = JAI.create( "fileload", srcFile );
          ParameterBlock p = new ParameterBlock()
                    .addSource( op )
                    .add( dstFile )
                    .add( "JPEG" );
          RenderedOp saveOp = JAI.create( "filestore", p );
}It works fine, except the colours in the output are all wrong.
After running
java Test NEC_LCD3000+Soundb_R.tif bad.jpg
my output looks like
http://xtuml.jdns.org/bad.jpg (if you can even see it. Firefox refuses to display the image. Gimp and KView can open it though, but all the colours are messed up)
The output should look like
http://xtuml.jdns.org/good.jpg
The original was ripped from NEC's website:
http://www.nec-display-solutions.com/coremedia/download/18634/LCD3000-ProductPicture-Soundbar-Side-R-TIF.zip
I suspect it's a problem to do with Color Models or something, but I'm way out of my depth in this area.
Can anybody suggest a solution?
Thanks in advance!
Regards,
James

Maybe this is the problem... the original image has an alpha channel. When I used the GIMP to flatten it back to RGB (with no alpha channel), JAI works fine...
Does JAI support RGBA? Am I posting in the wrong forum? Is the whole world against me? :P

Cannot Export JPEG still picture from MPEG

I am trying to use Quicktime Pro 7.1.3 to export a still picture (in JPEG format) from an MPEG video, but this is not working. I followed the directions in the QTPro User Guide: I play and then pause the video once it reaches the desired frame. Then I select FILE->EXPORT and in the "Export" selection box, I select "Movie to Picture". Then I click on the "Options" button, and select the Compression Type of "Photo - JPEG". I must say I am puzzled as to why I then see a ".PCT" extension added to the filename. Also, I don't understand why, in the "Save as" selection field, there is no selection for "JPEG" file extension, and instead there is but a single type available which is called "All Files (.)". It makes me think I am not understanding how to use this function. After I click on the "Save" button, a small popup windows appears, and it shows that a file is written. When I try to open that file (on my local hard drive) with my Firefox browser, I get a plain text message in my Firefox screen which merely names the file. I also tried specifying other compression formats under "Export to Picture", and also tried using Firefox and other programs to open the files written by this Export operation, all without success.
If I use s different Export operation (Export to BMP instead of Export to Picture), I can get a usable BMP, and I can use another tool to convert this BMP to a JPEG, but the resulting JPEG is only a little over 30k in size, and I believe I am getting a lot lower picture quality than what I might get if QTP could directly Export to a JPEG.
Here is some info on my environment: I am running Windows XP Home Edition with SP2. Hardware is a Dell Pentium 4 with 2.8GHz cpu, 512MB ram, and over 50GB of free space on the hard drive. I just installed QuickTime Pro 7.1.3 today (and I have already tried de-installing it, and re-installing it, and this did not help).
Am I mis-understanding the instructions in the User Guide? Can anyone suggest how I can get QTP to Export a still image from an MPEG video directly to a JPEG file? Thanks!

QT Pro does not export to jpeg or other image formats. Instead, the picture export (Movie to Picture) creates a PICT format file which contains the frame in the specified compression inside the PICT file. PICT is thus a container file format which can contain image in many different compression formats. If you need an actual jpeg format file you will have to export to one of the uncompressed formats and then use some other graphic utility to convert that file to jpeg format.
Alternately, you can use QT Pro to Copy (Edit menu) the frame to the clip board and then a graphic application to import that frame from the clip board and export it in jpeg format.

Fireworks cs4 batch change color in jpegs?

Is it possible to use fireworks cs4 batch command to change the same background color on multiple jpegs?
Thanks in advance,
Carl

Hey... solved it! Changed the background color in almost 2,000 jpegs. Heres how:
Photoshop CS4, first define a color in an AXT file:
Open test image, image, adjustments, replace color. use eye dropper to sample the background color, bring hue, saturation, and lightness bars all the way to the right (background color now turnd white), click save (save the definition AXT file, you will need to reference it later).
Now create a new action called "replace color", have test image open (with original background that you want to change), start record and do this to record the action:
Image, adjustments, replace color. Click load and select the AXT file, click load (the background color now turns white with the loaded AXT definition). Click ok. save file. Stop record action.
Now run a batch command and use that action you just recorded: File, automate, batch, select your new action in the play section, select the folder of files to process and the destination... click ok to run the batch.
I changed the "background" color in 2,000 estore product images of various sizes (thumbnail, medium, and large sizes) in about 15 minutes. Wow! I knew there had to be a way.
Hope it helps lots of people, 'cause it sure is a common need.
Cheers,
Carl

Jpeg optimization

I am working on a graphic image in Fireworks (Macromedia MX)
and since I am using gradient colors, I have optimized it as a jpeg
(80-better quality). The image itself is approx. 740 x 425 pixels
and I have been working with the optimization to get the file as
small as possible but still retain the clarity of the image. Is
there a way to show the size of the file in Fireworks as I play
with the optimization? What file size should I limit this image to
for dialup/broadband? Also, as I said, this is a jpeg but when I
edit my button symbols, I notice that it says they are .gifs. Do
the buttons display on a webpage as a gif or jpeg, or does the
entire image display as a jpeg. Another question I have is to find
out if there is a way to optimize different areas of my image in
different optimization levels and if so, how is this done? Sorry
for so many questions. Please help. Thanks.

On Fri, 19 Jan 2007 00:55:18 +0300, P-C-Surgeonz
<[email protected]> wrote:
> I am working on a graphic image in Fireworks (Macromedia
MX) and since I
> am
> using gradient colors, I have optimized it as a jpeg
(80-better
> quality). The
> image itself is approx. 740 x 425 pixels and I have been
working with the
> optimization to get the file as small as possible but
still retain the
> clarity
> of the image. Is there a way to show the size of the
file in Fireworks
> as I
> play with the optimization?
You may switch to "Preview" tab (right next to "Original" at
the top of
your image). File size will be shown at the top right area
above the image.
> dialup/broadband? Also, as I said, this is a jpeg but
when I edit my
> button
> symbols, I notice that it says they are .gifs. Do the
buttons display on
> a
> webpage as a gif or jpeg, or does the entire image
display as a jpeg.
FW shows sizes for slices separately. Maybe you have slices
set to be
exported as GIF, once you switch to them, their particular
size and type
is shown. Or maybe there's something else going on that I
can't figure out
from your explanation :-)
> Another
> question I have is to find out if there is a way to
optimize different
> areas of
> my image in different optimization levels and if so, how
is this done?
Modify -> Selective JPEG. Here you will be able to define
an area to be
exported with JPEG compression setting different from that
for the rest of
the image.
Ilya Razmanov
http://photoshop.msk.ru -
Photoshop plug-in filters

Image file formats gif, png, jpeg, tiff

Hi guys,
I've read a little bit about this, so I know the some basics:
gifs: lossless, transparency/animation, 256 colors
jpeg: lossy, no transparency, 16 million colors, etc.
png: lossless, 16 million colors (?), newer/better compression and transparency than gif
But I want to hear it from the designers (web and/or print, cause I do both). What format do you guys use for editing/printing photos? I've always archived and printed my photos as TIFFs, they're huge, but this way I just avoid any hassle of quality loss.
I've been reading that I should keep my photos as PNGs and then print final versions as JPEGs...is that true? How do you guys utilize the various file types?
Thanks!!!

For print I use .tiff's ( just like you ). I limt .png files to the internet. I would not convert the .png to a .jpg for print. If anything, I'd copy the original .png and convert it to a CMYK .tiff or .psd file.

Pixelation issue resizing jpeg Logo - Illustrator CS5

I'm working on a file where they've supplied me with their logo only in jpeg format. I'm trying to lower the size for the small artboard (to approx 15% of it's original size) but can't find any way to make it even the slightest bit smaller without noticable pixelation - let alone an 85% reduction. This will ultimately be print ad so I'm trying to keep resolution in mind.
I'd appreciate everyones expertise! (Illustrator fixes only please as I do not have photoshop)

I wasn't looking at it in overprint preview but did since your message and it makes no difference. It is for a small newspaper ad 2"x3.5" so I of course need the logo to been even smaller than that.
Here is the provided jpeg image:
Here it is at 15%:
As for looking at it in 100%...(perhaps is my lack of advanced illustrator knowledge)....I've always found at 100% it is not true to scale - somewhere around 155/156% I find is true to scale when printed.

RAW+JPEG over just RAW

hi guys. im an amateur photographer and have been shooting in JPEG, but the more i get into the hobby, the more i think i should start shooting in NEF RAW. i have a D80 and was looking for some clarification on the advantages of shooting RAW+JPEG over just RAW. the books all say its an option, but never really go into why you need the JPEG on top of the RAW image. any feedback would be great.
j

Everyone can have their own reasons for RAW+JPEG.
Here's one:
Your in camera settings can have sharpening, contrast and small/medium JPEG set. After a shoot, you can quickly send off your jpegs to friends, clients, web page, etc., without having to do any photo editing. Afterward, you can take your time with adjustments (levels, color, sharpening, etc.), with your RAW picks.
Others may chime in with their reasons.
Narvon

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

JPEG, Lossy Here?

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