JPEG Compression: Data Loss & Image Impact

As this subject comes up quite often you might be interested in the exaggerated examples shown on the following website. The author used the rotation command to show the effect on a JPEG image.
http://www.jmg-galleries.com/articles/jpeg_compression.html

If you want to see an
extreme example of this, have a look at Russell Brown's
Shake, Rattle, and Roll Script Quicktime video found here:
http://movielibrary.lynda.com/html/modPage.asp?ID=131
Edit, I tried to give a direct link but couldn't...so you have to navigate to
Shake, Rattle, and Roll.

Similar Messages

Jpeg compression for tiff image (nt gettin a view of jpeg compressd pages)

Hi All,
I have a problem of jpeg compression inside a tiff file. When I convert no. of pages in a multi-page tiff file I m not getting a view of jpeg compressed pages. I convert black and white as well as gray scale jpeg images inside the tiff file. I used Compression Group4 for black and white image and JPEG compression for gray scale image. Also set the dpi of each page. But most of the viewer doesnt support my jpeg compressed pages. When I set the quality of jpeg images to 0.1f that time I m getting a view of particular images for some image viewer.
My requirement is to show the jpeg compressed image inside the IMAGING PREVIEW 2.5 VERSION. But it doesnt support for my output tiff. As well as cant get properties of that page inside the Fax viewer except Resolution 200x200 dpi.
     If anybody has any idea to compressed jpeg image inside the tiff file, please tell me how I can compress the gray scale image using jpeg compression.
Thank you in advance
Dipak

Hi Maxideon,
Thank u 4 ur immediate reply. But my requirement is, to show d tiff file only in IMAGING PREVIEW 2.5 VERSION. I tried lots but didnt manage to get a view of JPEG compressed page. I think somewhere I m doin wrong. Somewhere I wrote wrong code, cause d properties of jpeg compressd images also not getting in Fax Viewer except DPI. I change the BaselineTIFF Tags of JPEG compressed image, but cant manage output yet. I think d problem create at d time of metadata writing. My problem is tht, tiff created using sum other soft. is suppported by IMAGING PREVIEW 2.5 VERSION, y nt mine?
Here is my code for BaselineTIFFTagSet:
if(isBinaryImage) {
             // resolution unit
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(296), 2));
             // bit per sample
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(258), 1));
             // compression
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(259), 4));
             // rows per strip
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(278), bImageImage.getHeight()));
        } else {
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(296), 2));
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(258), 8));
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(259), 7));
             // thresholding
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(263), 3));
             rootTiffIFD.addTIFFField(new TIFFField(base.getTag(278), bImageImage.getHeight()));
        }     If u have any idea 4 write a metadata of jpeg page wid jpeg compression, can u plz suggest me hw to write a metadata 4 jpeg image? Which Baseline Tags r needed to set d jpeg compression?
Thank you
-dipak

Controlling level of JPEG compression when exporting from iPhoto 6?

Hi all,
I'm wondering whether one can adjust the level of JPEG compression when exporting images?
I'm still on iPhoto 4 that unfortunately doesn't offer this option and by default produces fairly large images that aren't well suited for web presentations.
I'd be happy to upgrade to iPhoto 6 for that feature alone.
Cheers Martin

HI Martin,
There is no compression option in the File>export window. You can however input size dimensions so a 2592x1944 can be exported to any 4x3 value such as 800x600

What jpeg compression does image capture use to save an image

I am about to scan colour positive slides from many years ago, using image capture and a scanner (Epson 2450 photo). Can anyone tell me what jpeg compression is used when the scan is saved to disk? Further, is there any way to alter the quality of suh compression, from say, medium, to highest?

You might be able to find it when you export it from Image Capture.

Some of Photo (JPEG)-compressed images by Flash Pro are not shown in AIR app (3.7/3.8)

Does anyone see this issue happening? In Flash Pro it's OK, but in AIR, it's broken.
https://bugbase.adobe.com/index.cfm?event=bug&id=3558175
Problem Description:
Some JPEG-compressed images in swc produced by Flash Pro CS6 is not shown in AIR.
Steps to Reproduce:
1. Create a fla with Flash Pro CS6
2. Put a png image in it and open the property of the image to make sure its compression option is Photo (JPEG)
3. Produce an swc out of the fla
4. Create an AIR app that shows the contents in the swc
Actual Result:
All images are shown
Expected Result:
Some of the images are not shown (nothing is shown where they are supposed to be)
Any Workarounds:
Use Lossless (PNG/GIF) for all images

i was able to get it to work from a suggestion in another thread: if you write a JSFL that goes through all your bitmaps and makes sure they do not uset he default compression of the document, but instead use custom compression (it can match the default however). this worked for me

Error saving TIF image with JPEG compression (IndexColorModel)

Hi all,
i recently came upon the following error:
javax.imageio.IIOException: Metadata components != number of destination bands
     at com.sun.imageio.plugins.jpeg.JPEGImageWriter.checkSOFBands(JPEGImageWriter.java:1279)
     at com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeOnThread(JPEGImageWriter.java:694)
     at com.sun.imageio.plugins.jpeg.JPEGImageWriter.write(JPEGImageWriter.java:339)
     at com.sun.media.imageioimpl.plugins.tiff.TIFFBaseJPEGCompressor.encode(TIFFBaseJPEGCompressor.java:489)
     at com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.writeTile(TIFFImageWriter.java:1835)
     at com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.write(TIFFImageWriter.java:2686)trying to save a tif file with jpeg compression. The code used is this:
public static void main(String[] args) throws Exception{
    String s = "c:/sample images/gray_bug/graybug.tif";
    BufferedImage bi = ImageIO.read(new File(s));
    File outFile = new File(s + "-out.tif");
    ImageWriter writer = (ImageWriter)ImageIO.getImageWritersByFormatName("TIF").next();
    ImageOutputStream ios = ImageIO.createImageOutputStream(outFile);
    ios.setByteOrder(ByteOrder.LITTLE_ENDIAN);
    writer.setOutput(ios);
    TIFFImageWriteParam writeParam = new TIFFImageWriteParam(Locale.ENGLISH);
    writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    writeParam.setCompressionType("JPEG");
    writeParam.setCompressionQuality(1f);
    IIOImage iioImage = new IIOImage(bi, null, null);
    writer.write(null, iioImage, writeParam);
    writer.reset();
    writer.dispose();
    ios.flush();
    ios.close();
}The test image that creates the problem can be found here:
http://s11.postimage.org/7wl195w8z/graybug.png
Any ideas what might be wrong?
I am using imageio 1.2-pre-dr-b04 and JDK 1.6.
TIA,
Costas

I can't help you but here's an exercise for you. When you get an exception you can't explain yourself, try posting it in Google. With a catch: remove anything from the error message that is specific to you like a classname or a specific value.
In this case there is nothing specific in the error message so try a search for "javax.imageio.IIOException: Metadata components != number of destination bands". One thing is for sure: you're not the first to run into this error.

Tiff image with JPEG compression

How does photoshop handle RGB and YCbCr as photometric interpretations of tiff image with JPEG compression?
Are they same?

Got no idea but here is a website with a adobe pdf answer.
http://www.ask.com/web?q=How+does+photoshop+handle+RGB+and+YCbCr+as+photometric+interpreta tions+of+tiff+image+with+JPEG+compression%3F&search=&qsrc=0&o=0&l=dir

Problem with "Insufficient data for image" and embedded JPEG 2000 Images

I frequently download pdf from the http://www.glorecords.blm.gov web site. They are reporting a problem with Reader Reader 10.1.4 and the pdf files they have.
"("Insufficient data for image" and embedded JPEG 2000 Images)"
I am experiencing the same "Insufficient data for image" error when opening their downloaded pdf and viewing in ACROBAT X 10.1.4.
Can someone address this please?
Win 7 sp1

Read this:
http://blogs.adobe.com/dmcmahon/2012/08/21/acrobat-insufficient-data-for-an-image-error-af ter-updating-to-10-1-4-or-9-5-2/

Jpeg Compressed Tiff images

I am trying to open TIFF files that have Jpeg compression but QT does not support this combo. These have become very standard in the document storage world as type of thumbnail/baby image. Anyone know how to get in contact with someone at Apple to see if they can add this capability? You can view plain jpg and tiff files with QT but not the Jpeg compressed TIFFs.
Mark

Can you please post the code that you are using? com.sun.media.jai.codec.TIFFDecodeParam --> this can help you out.

How to decode jpeg 2000 compression in dicom image ?

I'm working on dicom image viewer. How to decode jpeg 2000 compression in dicom image? Please help me. Thanks.

Illustrator is not a jpg editor.
There are 2 things you can do....
Use Live Trace to trace the jpg then adjust the shapes for the track. My guess is this won't work well at all.
Use the pen tool and draw the path yourself. You can then completely adjust the path all you want.

DNG with CS5 is always compressed with loss !

This is not up for discussion , but only as an FYI to all and every one out there using DNG in Photoshops Raw interface:
DNG done by CS5' s raw 6.x interface will make every DNG file compressed "with Loss" , its not lossless at all ...!!
To the Adobe Team :
....why dont you let us Pro's know about the Fact that your camera Raw 6.x interface will "Compress" an original DNG file
if a preview jpg is updated ( small option in the right top scroll down menu) within this Raw 6.x interface ?
...This is a huge Damage for a previous perfectly and integer (not compressed) DNG file, for your subsequent compression and re-saving of the DNG is
NOT lossless.....on top of the fact that you do NOT inform us of a "compression" step here , and that we are NOT given an option in your interface of raw 6.x for this NOT to happen, as in :...."do not compress" when update preview jpg
i have now destroyed 1500 DNG images , from a commercial client shoot,.. by updating all the DNG preview jpgs , ....all DNG files
now show noise and other artifacts, especially in the always so critical blue chanel,.....this is a shoot where the shoot budget was
over 50'000 $ !!...
i also can not open the DNG files anymore in its proprietary software anymore neither,.... sinar capture shop ,....since your raw interface compressed all DNG files... a step that was not asked for...a step that is NOT needed....EVER !
please everyone ,...spread this around !!

Ad Agency wrote:
...that when updating a preview jpg of a DNG in an open CS5 RAW interface window, CS5 will compress your underlying raw data....something you seem not to be able to read .....so i gather your english...which is ....i am sure ...the only one Language you speak on the other hand .... is definitely a language you need to learn how to read ,...at this point.... dont you think so ?
Wrong...updating a DNG preview will have exactly ZERO impact on the raw data of your file. You are quite wrong if you think this...seriously...do the research (which you claim to be able to do).
Ad Agency wrote:
...if you would have surfed the internet you would have seen my work.....and that's very serious stuff...serious GLOBAL stuff i do...compared to your work,...which seems to focus on books for amateurs....LOL
so i guess...yo dont really shoot for clients out there..right?
I saw your web site (it kinda sucks on mobile iPad BTW, might wanna look into HTML5 instead of Flash). I'm very familiar with the high anxiety and drama/trama of fashion photographers (actually, some of them are friends). You might wanna look at my own website www.schewephoto.com. Been there, done that, have the Tee shirt ya know?
Ad Agency wrote:
...so do yourself a favor here, and stay out of this forum.....you clearly dont belong here !
and yes...the postings are coming from 2 places...my ad agency,...and my shop as a Fashion Photographer , which i do for a good 20 years between Paris, London and New York.
and yes ...imagine this......i actually do research...and do the globally very respected photography stuff only for fun.....on the side ...of my real job: Research !
Well, am I talking to a photographer or ad agency? In my experience, ad agencies really DON'T have a clue about digital workflow...and NYC shooters tend to rely on digital techs. Maybe you are different (so far, the way you are behaving here indicates it's par for the course).
Ad Agency wrote:
...and lets see ...what do you do again?.....books....for wedding photographers?.....
stay out of here....
let the forum people here discover something very serious....without your tangent-distractions on sinar's' financials....or my 12 language skills and my PHD in Physics
grow up !
I'm pretty grown up...25 years+ award winning ad work. No, I don't have a PHD (personally, I've never met anybody with a PHD that could shoot their way out of a paper bag, but that's just my experience) but I do have a couple of degrees from RIT (highest honers BTW if that matters).
You wanna do dick measuring? I'm your guy bud...you chose the wrong guy to get down into the mud with.
Ad Agency wrote:
i will not respond to anyone anymore here ....period
not even to the guys who actually have serious questions to ask...
imagine this....because of people like you
...again!
Well, too bad...because something somewhere is whacked. If you think that by updating the DNG preview you are changing your raw image data, then it's all on you bud. The conversion from raw to DNG (except for a few formats that require Linear DNG conversion) is completely lossless. And what the heck do you care about updating the DNG preview? The only need to update the DNG preview is if you are using a 3rd party application that can't read the raw data (like some 3rd part database management apps).
Seriously dooode, you need to fix your attitude. If you come down off your high horse, you might be able to learn something. Otherwise I suspect you need to start hiring some digital techs that know a bit more about digital than you do (there are a lot of good ones in NYC, I would be happy to give you some names).
:~)
P.S. for the rest of the people reading this thread let me apologize in advance. The OP is a high strung fashion doode that is obviously flailing about and having some "issues" which are causing a degree of angst that is making the discussion a bit over the top.
P.P.S. You are right...I'm getting rid of my P-65+ back and getting an IQ180 back shortly...60 MP ain't enough, I want 80 MP...

PDF's I'm creating with Group 4 data report Insufficient Data for Image

I am maintaining a software application, which creates PDF files from JPEG and TIFF (with Group 4 compression) image files, which typically come from scanners. It has performed well for many years, but as of the release of Adobe Reader X, we are seeing "Insufficient Data for Image" on some images.
I've read reports of this message on these forums, and I've tried shrinking the image, adjusting zoom, and upgrading to Adobe Reader XI -- none of these have worked.
Our software creates these PDF files by wrapping the raw image data in an XObject, which looks like this:
24 0 obj
<< /Type /XObject
/Subtype /Image
/Name /Im1
/Filter /CCITTFaxDecode
/Width 1704
/Height 2200
/BitsPerComponent 1
/ColorSpace /DeviceGray
/DecodeParms <</K -1 /Columns 1704 /Rows 2200 >>
/Length 25 0 R >>
stream
<<BINARY DATA>>
endstream
endobj
25 0 obj
31512
endobj
Wherein, the <<BINARY DATA>> are 31,512 bytes of raw image data -- the same data which would appear in a Group 4 compressed TIFF file.
Indeed, when we do create a Group 4 TIFF file with the same binary data, it opens successfully in all common viewers.
Any assistance, such as the precise meaning of this error message, could be helpful.

Just a note that the bug appears to relate to JPXDecode, so far as all previous reports seem to suggest (no inside information). JPXDecode supports multiple image resolutions in the same image, so messing with zoom sometimes helps. If you can post a complete file somewhere it might interest someone who could analyse it.
The message simply means that decompressing the filters does not yield enough bytes. This may either reflect that there really isn't enough data, or it could indicate any kind of data error (which causes the filter to silently return EOF).

Flatten transparency without lossy JPEG compression

Acrobat is using lossy JPEG compression (quality: medium) on some images after transparent objects were flattened. Even if the images had a ZIP compression before, Acrobat will use a lossy JPEG compression. The result is a loss of quality. There are also differences in quality within a single image, cause some images are divided in parts with a ZIP compression and with a lossy JPEG compression.
Is there a workaround to use Acrobat's transparency flattening without JPEG compression? The problem appears in Acrobat 7, 8 and 9.

Hi Cropas!
As stated above my PDF export settings you can read that this option is set to OFF. <Create Tagged PDF: Off>.
Indd can not cope with this option for embedded PDF document indd?

"convert colors" causes jpeg compression?

I recently had to re-install Acrobat, and since doing so whenever I run my preflight profile which is set to convert spot colors to cmyk, it's also apparently increasing the jpeg compression at the same time. Everything seems to be gaining bad jpeg artifacts after the color conversion (even when the colors being converted have nothing to do with the images).
It may be unrelated, but it also seems to be creating all sorts of ICC profile non-cmyk colors in the process. I.e., before "convert to cmyk for digital printing" I run a preflight that simply checks for non-cmyk colors. This profile warns me that there is a Pantone color in the ad. I check the separation preview and find only one or two things with Pantone colors. I then run the convert fix. The Pantone colors go away, but now there are sometimes dozens of items that are showing up as ICC profile colors, and this seems unfixable. I can't create a profile to convert them.
What's going on? Are there settings somewhere that can select the degree of (or lack of) jpeg compression? Why is it compressing the file at all? I have no such setting selected in the preflight profile. I tried creating a profile that does absolutely nothing at all but convert to cmyk, and it's still causing these problems.
This is using Acrobat 8. It's the same version, same disks, we used before, but these problems are new. I may have a setting wrong somewhere.

You are not making sense, and your methodology is fundamentally flawed.
Hitting Command+S without editing the file is NOT "saving". It's not doing anything at all. The program just idles.
You can verify this by observing that the file's modification date does not change.
Even your limited but flawed methodology will show the degradation if you change even a single pixel before hitting Command+S. Then you will be degrading the image. Just make a one-pixel change, for instance with the pencil tool, then save. That is the same as doing a Save As.
Note that in your original query you were indeed changing a file by converting it to a different color space. THAT is a change.
Independently from the above, your methodology of comparing two layers blended in Difference mode has the inherent limitation of the monitor's performance in displaying the shadows. Your monitor, no matter how high-end, will NOT show you a difference between a 0,0,0 pixel (R,G,B,) and 0,0,1 or 1,0,0 or 1,0,1 for instance. SAme goes for 1,0,2 etc., until you reach the lower threshold of your particular monitor.
There are two preferred methods of comparing two layers to see if they're identical.
Comparing allegedly identical images in Photoshop
The first one, championed by the late, lamented author and guru Bruce Fraser, is as follows [direct quote by copy and paste]:
A better way of comparing images with identical pixel dimensions is to use [Image menu >] Apply Image… > Subtract with an Offset of 128.
Difference only shows pixels that are lighter in the source than in the target (or maybe it's the other way around—I forget) where Subtract with Offset 128 shows differences in both directions.
Pixels that are identical in both images come in as RGB 128 gray, those that are different come in at a value that exactly reflects how different they are.
It also makes it much easier to spot subtle differences…
=== ===
The second one was suggested by someone in the Color Managament and Photoshop Windows forums, which follows:
(NOTE: only the methodology is of interest and pertinent, not the questionable context in which it has brought up and used.)
* 1) Open the two images to be compared in Photoshop
* 2) Move one image as a layer over the other one
* 3) select "Difference" as blending mode in the layers palette
* 4) now the whole image should appear seemingly black on the monitor
[So far this is the traditional, "time honored" method.]
* 5) select the magic wand tool with these settings: Tolerance: 0/ Anti-alias: no/ Contiguous: no/ Sample All Layers: yes
* 6) click somewhere into the formerly gray area
[This refers to an image of a Color-Checker type of card that had wide gray border around it. The test, therefore, requires a pure gray image in the image, something highly unlikely to change, in order for the magic wand to select all pure-black images (255,255,255). Such a border can easily be created around an image by increasing the canvas size and filling the newly created space with pure gray (128,128,128). ]
    Explanation: you just selected all completely black pixels (0,0,0) i.e. all pixels that are identical in both layers.
* 7) you should see "marching ants" forming rectangular patterns
* 8_) invert the selection (Shift Command I)
   Explanation: the selection now covers all the other pixels, i.e. all pixels which are different between both layers.
* 9) create a new empty layer and select it in the layers palette
* 10) set the foreground color to white
* 11) fill the selection with white (Alt+backspace on Windows, accordingly on Mac)
* 12) set the blending modes of all layers back to normal
    Explanation: you now see all identical pixels in their respective color and all different pixels in white.
This method is a lot more sensitive than the traditional one which stops at step #4 above.
Finally:
jfraze wrote:
Wow, the level of hostility is amazing on these adobe forums…
Only because people like you come in here itching for a fight, rather than to seek help. It's just the way you choose to react—and to intereact with others.
Wo Tai Lao Le
我太老了

Jpeg File Save & Loss Rate in PSE

When working on jpeg files in the PSE Editor, does PSE perform an automatic internal file "Save" after each adjustment, (i.e., levels, color, etc.)? I have always assumed that the file does not get saved until the user performs a manual save after all editing has been completed.
If automatic internal "saves" are performed after each adjustment on a jpeg file. then image degradation could be accelerated beyond what one would expect, i.e., each Save of a jpeg file reduces image quality. If these automatic Saves are being performed, then I guess the only way to edit files is in a psd format, then save the final psd file to a jpeg format to conserve disk space.

Bob Ward wrote:
When working on jpeg files in the PSE Editor, does PSE perform an automatic internal file "Save" after each adjustment, (i.e., levels, color, etc.)? I have always assumed that the file does not get saved until the user performs a manual save after all editing has been completed.
Yes.
If automatic internal "saves" are performed after each adjustment on a jpeg file. then image degradation could be accelerated beyond what one would expect, i.e., each Save of a jpeg file reduces image quality. If these automatic Saves are being performed, then I guess the only way to edit files is in a psd format, then save the final psd file to a jpeg format to conserve disk space.
No, the 'in memory' format is not saved to the drive unless you manually choose to 'save as'.
If you periodically save a jpeg version (overwriting the older ones), without closing the file, jpeg compression changes are not cumulative. The 'in memory' version is kept unchanged. It's not like you save to jpeg, close and re-open, in which case the jpeg double compression would have taken place.
If you want periodic saves in a long editing session of a picture, it's best to save as psd, because that saves layers, selections... It's also better if you work in 16 bits. If you save in jpeg, the jpeg compression will be done only once, there will be no cumulative loss of quality.

JPEG Compression: Data Loss & Image Impact

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