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Q&As: JPEG image compression FAQ, part 1/2

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Questions strongly related to this FAQ:

I have been asked to send a JPEG file but my software is normal Windows Word, etc. How can... by Gill (9/9/2003)
I want to know about "text format" . How is text treated while it is stored. And how... by fahimtufail (3/17/2004)
I do need to send an image over network at the rate of 100 ms . So i used jpeg format ,... by ragu (7/28/2003)
what is a jpeg(as-is) images by Wolf (4/7/2004)
Hi, what's the best image compression software you use besides Photoshop, Image Ready and... by liying (7/29/2003)
I am trying to send several jpegs to a relative. She is not getting the pictures,... by Richard (7/29/2003)
How does jpeg handle errors? From a naive understanding of huffman compression it... by Cushy (5/24/2004)
Corrupt .jpeg and .avi files I have about 60 to 70 photos and movies that I have taken... by lazlatko (2/8/2004)
I have been asked to develop a computer program in any programming language to perform... by Jennifer (9/21/2004)
How do I transfer a picture in MS Word to a JPEG File? by Cheyene (5/12/2006)
what are feilds of jpg images by ali (11/19/2003)
what is the advantage of wavelet analysis rather than fourier analysis by bachi (3/22/2004)
how can i distinguish between progressive and non-progressive jpegs ? by dneussl (9/25/2003)
how do i convert windows picture and fax viewer to jpeg. file by ray (8/2/2006)
preco nerozumiem z tejto web stranky ani slovo? by molly (10/14/2003)
What does the term Jpeg mean by tripi (4/21/2004)
I scanned some pictures on high resolution and ended up with huge jpeg files - too large... by Sherry (10/16/2003)
what are the algorithms of JPEG 2000? by sumi (6/5/2004)
I had recently downloaded Macromedia Fireworks, and I had removed it because I no longer... by JPEG user (7/15/2003)
MY PICTURES TURN OUT TO BIG WHEN I SEND THEM VIA EMAIL (OUTLOOK EXPRESS) WHAT DO I NEED TO... by mike (12/25/2003)
how can i compress and decompress jpeg file by kilua (12/1/2003)
plz tell me which other technique of loss image is present now days(not JPEG orMPEG)... by sanam (2/3/2006)
how do i read a bitmap image into a file in matlab by sharma (3/28/2005)
I can't open JPEG files,I've download a lot of covers and i can't open there by tuitui (1/2/2004)
can i do JPEG compression using MATLAB? if so how should i do that? by arana (7/12/2003)
Where can I get image compression software by KIDO (4/21/2004)
Is there a way to open received .jpeg files in Outlook Express and compress the image to... by Haani (8/5/2003)
my options to store a picture are TIFF Document(*.tif) Fax Document (*.awd) Bitman... by shimeter (3/27/2004)
what is JPEG compression? by jiji (7/2/2003)
I am having trouble sending pictures in the jpeg format. Could you please explain how it... by king (12/28/2003)
why my JPEG image change to BMP image ? by lim (5/23/2004)
i have a vivitar camera & ive pluged it into the computer & nothing happens but a little... by manda (1/4/2007)
improving and opening jpeg jpg files by joe (1/7/2005)
I'm interested in making a software that resave jpeg with just a few local changes without... by xelanoimis (12/11/2003)
what applications are jpegs used for? by cousins (2/24/2004)
Please Help Me! I have been searching the WWW to find an answer to my question and I... by Becca (2/3/2004)
I need to reformat my jpegs into "less than 10M bytes or a baseline of 3072 x 2048" for... by biard2 (9/21/2004)
How do you name a JPEG/JFIF file? by De (11/12/2003)
I am using the djpeg (from IJG) to decode images. I would like to compare decoding times... by Clue (4/5/2004)
HI I transfered some jpegs by zipgenius to a compressed zip disc.they lost their colour so... by rdee (9/27/2003)
I have heard that JPG files lose data every time they are opened and closed, whether or... by kayte (11/7/2003)
Hello, I'm trying to build some program under Microsoft Visual C++ 6.0 using externals... by cjmn (5/3/2005)
At what resolution should I use a scanner when uploading gif images to jpeg for the very... by nupab123 (7/18/2006)
HOW TO COMPRESSE THE IMAGE? by SEKAR (9/2/2003)
What is the file format of jpeg ? by Nitul (4/27/2004)
What is the procedure to send a photo in the JPEG format by Email? by hchern@webtv.net (3/30/2004)
how can i put my picture on file by kallin2004 (1/26/2004)
Is it possible to get multipage Tiff file into single Jpeg file. by Harry (2/12/2004)
How to compress the image data to the buffer I allocated not the file (including the... by qhgary (12/22/2003)
do you have pictures on Jpeg by mo (7/19/2005)
Hi, What about lossless jpg compression, which is also named JPG2000 format? Which... by akrespin (6/30/2003)
Why do jpgs open up fine on my computer through programs such as photoshop and internet... by jbr (2/3/2004)
How can I extract the date & time from a JPEG? I noticed that my Casio and Canon cameras... by holgerjakobs (8/17/2003)
I made a word 2000 document file and add one jpeg image. When i send it to someone who is... by Aj (10/12/2004)
where i do get journal/research/thesis papers on image compression using neural networks... by RAJA (5/10/2004)
how we do rle of tiff file format? by asavari (10/8/2003)
I can not open some of the JPEG images, taken with the digital camera. Adobe Photoshop (I... by ola (12/21/2003)
what are the steps in jpeg encoding by hany (10/20/2003)
how can i compress a jpeg file to decrease it's size or jpeg can not be compressed tanks by zoba (12/15/2003)
WHEN I DOWNLOAD IMAGES FROM MY VIVITAR CAMERA INTO MY PC, DO THESE IMAGES REMAIN IN THE... by GERSHON (4/28/2005)
What is the HTML code for placing a .JPEG image (from FILE) onto a webpage (run by another... by Jeff (7/2/2003)
Why don't my e-mails open up that have JPEG files by Pharmjeff (12/8/2003)
i can not open jpeg files at all when i try and open it up it shows the dialog box open... by beast (2/23/2006)
JPG 16 bits reality or a dream ? I have to deliver JPG at a maximum visual quality and of... by cybergg (6/20/2005)
How to convert PSD files into JPEG file ? please explain why some of my jpeg files got... by sam (8/7/2004)
jpeg files downloaded from my digital camera are about 1.5MB. When I save them after some... by Vikramdev Rao (11/15/2003)
What are Jpeg's 1, 2 and 3? by B (8/31/2005)
I have a web design class and create unpublished webpages every other day. When I insert... by camocat103 (2/9/2004)
I have several jpeg files that have truncated or incomplete problem. I had attempted... by sstark (12/10/2003)
Hi to everybody, I'm using the library GD in PHP and I have a script for upload photos... by vpalmar (11/21/2003)
I am a student at the medical faculty in Cologne,Germany. We have been working on sheep,... by Michael Weiss (5/14/2004)
How do i get my pictures of of Data File Segment every time i open my Cd it always has... by ICE^LADY (2/17/2005)
Hi there, how can I convert a jpg image to a mapping matrix of grayscale values. by Maverick_fencer (11/6/2003)
While trying to upload a map on our website, I continually get an error message from... by Liz (2/18/2004)
I have an arcsoft program on my windows xp professional computer. How do I change a *ART... by Kathy (11/3/2005)
what software and hardware required to create a file using JPEG by Laura (5/8/2004)
what to do to install windows picture and fax viewer. because i cant see jpeg image while... by satty (1/16/2005)
I have a JPEG compressed TIFF file. The file doesn\'t contain all the markers specifically... by Vipul Bahuguna (12/1/2003)
what exactly is image compression? please can someone explain it in a more simple context by keeda (12/16/2003)
have any source for converting formats to gether ? thank you . bye. urgent. by mahmoodz (8/14/2003)
Where can I buy JPEG software for downloading? by Woody (9/8/2003)
I would like to use a camera I have for measuring brightness levels, essentially as a... by Charlie (7/24/2003)
What is the difference between JPEG and JPG images? The file association feature of... by Len (10/12/2003)
The JPEGLIB2 provides only 1/8 Scaling ratio.I want to get a Scaling ratio less than 1/8... by tony (11/6/2003)
I have lots of JPEG images on my computer, but they are awfully big (100 KB at least). I... by Icy (8/24/2003)
what is the definition for JPFG by kriten (9/16/2003)
JPEG artwork has white background... how do I change it to "clear", so I can paste it over... by Christine (11/19/2003)
What is the position of the group regarding Compression Labs patents ? Thank you. by guirauton (5/11/2004)
I receive a picture by E-mail. How do I send it to someone in a Jpeg format? by hchern@webtv.net (3/25/2004)
how to design post entropy decoder? by ahmed (11/8/2003)
How can i find out what compression factor was used in a JPEG. I need to open a jpeg and... by sunny (12/29/2003)
How can I "convert" a jpeg buffer to a bmp buffer without creating any files by gal (8/3/2003)
I have several pictures that have a PPK file ext. I dont know how that happned. Has any... by Sawdust2020 (12/20/2003)
if you take several pictures of the same subject, why is the memory different sizes when... by alan (1/27/2004)
Where can I get the source code for cjpeg program? by FARINA (10/7/2003)
what is relationship between image compression and different format. by fahim (3/18/2004)
How do I change a word 2003 doc to jpeg by akin (3/30/2004)
Why Using Zig-Zag pattern in JPEG compression by Sulficker (4/16/2004)
can i compare the jpeg document which is been typed in ms word, and whether software is... by DEENU (7/27/2006)
Trying to attatch digital photo to e-mail. Used method described in Photodeluxe and... by David Brown (4/8/2004)
Where can i get matlab code for jpeg compression? by uma (1/5/2004)
How do u Change an Art. Aol File to a jpeg file . i tried save as and just put .jpg... by guyumi (3/26/2004)
i want to send a java image object over the net in the fastest possible way how to convert... by vievk (4/22/2004)
how to convert bitmap to jpeg thanks for your help. by mombo42 (8/28/2003)
How can i convert the jpeg file to show on vcd player? any free software to help me to do... by MY (5/31/2004)
hello, i have code for JPEG encoding part in MATLAB. Now my question is how we decode... by G,V.Penchala Reddy (4/22/2004)
discrete cosine transform method in jpeg comp in detail by latha (1/16/2004)
Downloaded JPEG files on my computer have several imperfections, e.g., tiny rectangles,... by mcdgary (11/23/2003)
I am working on a Steganography project, I need to know how to access the semi compressed... by Naveen (5/2/2004)
How can I add a keyword field to a jpeg file? I noticed that my Canon EOS D60 camera adds... by PhotoJoe (12/26/2003)
Why does my outlook express v.6.0 have trouble sending my picture attachments? I can... by kimmer (9/23/2005)
What about JPEG4? by px (12/13/2003)
When I try to save a .JPG file on my computer, it doesn't work. Only .GIF files work. Why... by Tom (2/16/2004)
I am very surprised that this question is not covered by your FAQ. Where do I get a... by Robin Forster (11/10/2003)
Hi, I need software that inputs an image file (jpegs & gifs) and outputs the color values... by tlfeet (2/28/2004)
Dithering of Web graphics can be avoided by using what? by Zozoro Groguhe (10/10/2003)
Hi! I have some jpeg files that were deleted, and now i have undeleted them but i cant... by Pedro (11/10/2003)
my computer has changed my jpeg to bitmap how do I change it back? When saving files all I... by lobo (11/23/2003)
how do I get a jpeg code on the attatchment on an e-mail? by David Brown (4/8/2004)
How do you calculate MIPS in JPEG? How much mips does jpeg take? by john (5/5/2004)
I'm new in JPEG, so my questions might seem obvious. Which image size are conceivable... by jackissy (5/6/2004)
How can I compress or reduce the image size of a jpeg file to e-mail it easily to others? by Naresh (3/14/2004)
HOW WELL DOES JPEG COMPRESS IMAGES? by VIDHYA (3/26/2004)
I recently got a new computer and now I can no longer scroll down and view a bunch of .jpg... by PJ (4/21/2004)
why jpeg is not used as Vector images by m (5/13/2004)
I am having problems viewing any image with .jpeg extension. Like, when I view *.jpeg... by Eric (2/6/2004)
problem of color baseline JPEG decoding: I am developing steganalysis software for JPEG... by Soma (5/20/2004)
If a picture originally taken as JPEG has been saved as TIFF, would it improve the print... by martabfp (8/28/2003)
I am attempting to write JPEG decompression program. With the information I have... by TxITGuy (8/21/2003)
how can i convert BMP files into losslessJPEG files? as JPEG has many formats, i want to... by kruti (10/4/2003)
What subsampling factors are supported by JPEG/JFIF? E.g. I think 4:4:4(1,1;1,1;1,1),... by Nick H (7/19/2003)
I try to open jpg file attachments and I get a message that says "cannot open component... by pattieann66 (12/18/2003)
what is full form of jpeg by jack (3/31/2004)
i uploaded some pictured from my digital camera back in sept and ive just gone in to look... by macca (2/6/2006)
All the images recorded in my Nikon Coolfix 1100 digital camera have been erased for... by guido (3/13/2004)
At present I am doing jpeg to doc conversion (in MS Word).Wen the work is submitted ,they... by Aziz Ahmad Siddiqui (4/25/2004)
What do I do precisely to file jpeg format for an email picture I received? I have... by Dora (1/25/2007)
I'm opening jpeg files and they are opening too large to fit the screen. Help! They are... by Kevin (7/15/2003)
how do i create a binary text message image by vensi (7/26/2006)
is "jpeg" format is Open source code format, if yes then how i get it. by Ravi Kumar (3/15/2004)
Where can I find some source code (or algorithms) to downscaling the JPEG at DCT domain? by AOE (9/19/2003)
can I make jpeg pack from page maker by john (11/4/2003)
Hi,What do I need, to put lets say 3 or 4 pictures into one jpeg. Save, then it looks like... by eddie-vegas (12/3/2003)

Questions somewhat related to this FAQ:

Why are jpegs photos downloading as bitmaps, and how do I fix it? A couple of months ago I... by Tom (8/3/2003)
I have hundreds of jpeg images from my digital camera. Yesterday I went to open one of... by jibaro (8/27/2003)
How to extract text from a .jpg file which is created from a scanned (text) page. by pankajbaid (4/30/2004)
a thumb size picture when clicked should enlarge. Needed a Java source code for this by gita (9/4/2003)
JPEG2000, is that a new standard that I am hearing about? or had it came and went? Thanks... by DOCWOO (1/19/2004)
what is the main techniques to image compression??and which of them is the best and why? ... by rednose (4/21/2004)
what is the diff between jpeg and mpeg ? by craig (11/21/2003)
HI I am just wondering if you can explain the difference between a pdf file and a jpeg... by Julie (9/30/2003)
Where can I find JPEG Compression Components for Delphi? by Schwilling (8/5/2003)
i want to get the width and height of the image from a JPEG image file using C-language ... by Girish (11/27/2003)
what is image cropping how it is related to jpeg why we need cropping what are the... by aparna (3/22/2004)
How can I change a GIF image to a JPEG photo? by Faran (3/27/2004)
I'm trying to open a JPEG file and it's telling me windows can't find .exe. Program... by rick (10/22/2003)
How do i convert GIF and JPEG pictures to OTA format for use in mobile picture messaging? by kedo (2/27/2005)
If I create a file with pictures and text like a flyer\'s using MS Publisher how do I... by tzone (3/27/2004)
I recently purchased a Panasonic DMC LC43 digital still camera. I also have a... by komet163b (1/13/2004)
I'm working with Psp 9 and I'm trying to import a custom brush... I'm trying to use a logo... by Jennie (4/15/2007)
Photoshop 7.0 JPEG format when obtained from an Epson scanner & transfered to a CD-R, is... by Ken Griffiths (12/18/2003)
How about a big 7-segment LED display used in scoreboards, something like a numbers... by Gio (12/25/2003)
When someone emails me a jpeg file I can not open it. What do I need to do? by holl53 (2/7/2004)
I extracted JPEG digital pictures from a CDRW that was in UDF. After extraction,... by Ty (7/5/2003)
some jpeg files don't contain 'JFIF' syntax.. & the standard image viewer don't view this... by kruti (9/11/2003)
Where can I get Matlab code to compress images using JPEG and JPEG2000. by Dave B (5/27/2004)
what is the best way to transfer vhs home movies to vcd-- is their a program that does... by johnnyb (10/20/2003)
JPEG PORTABLE STORAGE....I travel, and take a great many digital photographs on Sony... by Barry (9/28/2003)
i am on msn/hotmail. i am trying to send a picture to an aol user. she doesn't know... by shug (9/16/2003)
How can i possibly contact Thomas G. Lane, the main author of the interesting libjpeg,... by Hilton Fernandes (7/28/2003)
how i implement ipeg come by matlap by semsim (11/27/2005)
I can only view jpeg attatchments by hitting the print button on the dropdown box(the pic... by Smokey (5/3/2007)
how can i get my pass on jpeg format by emmatok (11/1/2003)
i would like to have detailed algorithm for jpeg image compression using matlab by khalod85 (11/8/2003)
i am trying to add images to my web page by linking them, but when i try, it says only GIF... by ms phila fan (8/3/2003)
My JPEG images open up in Internet Explorer. When I highlight some to open (14 for... by Alan (8/3/2003)
What is the speed of a digital camera? A Sony cyber shot for example. by jack (7/10/2003)
How can I add an overlay (logo) to go into the corner of every picture (jpg) on a site... by music (2/25/2004)
Where can i get the source code for the transformation from BMP(8*8) to... by WLLLLL (4/23/2004)
i have seen a program for image compression of BMP files. it is based on 1-D RLC. they... by Soma Sekhar (10/11/2003)
why in JPEG ,while taking DCT we are taking matrix of 8x8 dimension. also why we are not... by mohan (8/5/2003)
Why is my computer defaulting to a bitmap format when, up until recently, it had always... by gwydion (3/26/2004)
why does some black turn into blue in jpg photo image, e.g. a tire on a mobile machine has... by Philibert (2/24/2004)
WHEN I SAVE A PICTURE IT WILL ONLY ALLOW TO SAVE IT AS BIT MAP. I NEED TO SAVE IS IT AS... by BEA (12/12/2003)
I want to scan a large family photo library into digital form picture by picture, for... by Wes (9/14/2003)
I have some saved photos on my computer. How do I convert them to jpeg ? by joe (12/20/2005)
my images on a 3 1/2" floppy are not reading as jpeg now. There reading in an MVC format... by jim (5/16/2006)
How to attach photos to E-Mail messages as Jpegs without them opening and pasting into... by Marg (7/10/2003)
How can I convert regular JPEG photo files to the Sony digital camera format (JPEG with... by Patrick (10/11/2003)