Questions about the JPEG (`/ˈdʒeɪpɛɡ/ jay-peg`) file format. JPEG, seen most often with the `.jpg` extension, is a commonly used method of lossy compression for digital photography.

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18
votes
9answers
98k views

Facebook: Ways to preserve image quality of uploaded images?

After uploading an image, Facebook converts it to a new image. Their conversion process introduces artifacts and mottling to the magenta-ish parts of the image. Original image: Facebook's ...
15
votes
3answers
4k views

Why do people use JPG images?

I see JPG images everywhere. But why? PNG files have opacity, while JPGs do not. I've tried exporting some images to PNG and JPG to compare size, and they both either match up or the PNG is ...
8
votes
7answers
104k views

Can't save PSD as JPEG

I have a PSD file with one layer. When I try to save as JPEG it doesn't show JPEG and other formats as an option. It only displays a limited set of formats (5) including Photoshop. When I manually ...
7
votes
3answers
2k views

Why does Photoshop want to save JPEG as quality '10' out of 12?

I'm currently editing a bunch of images (JPEGs) and Photoshop keeps wanting to save them as 10/12 instead of 12/12. Why does it constantly want to save it as 10/12 instead of 12/12? Is there an ...
6
votes
3answers
3k views

CMYK JPEGs extracted from PDF appear inverted

I am having to deal with CMYK JPEGs extracted from a PDF source. The PDFs were created with Photoshop. The problem is that Photoshop stores JPEG CMYK data in PDF/EPS using "normal" values, whereas in ...
5
votes
3answers
12k views

Image looks 'foggy' when exported as CMYK jpeg from Photoshop

I'm editing an image for print and I've got it all set up how I want in Photoshop (cs5), but when I go to File > Save as > Jpeg (quality 12, Baseline standard) the colours all seem duller and ...
5
votes
3answers
12k views

How to Set JPG Type as The default save type in Photoshop CS6

Is there any option to save a file only in .jpg file format in Photoshop CS6? Actually I don't want to take any scrolling to indicate JPG mode when I'm going to save or save as an image.
4
votes
3answers
2k views

How to determine what quality a JPG was saved as?

When saving JPG images with Pixelmator or Photoshop, I select a quality from the scale 1–100 that gives optimum file-size. Later on, I sometimes take these images and crop them a little more (not ...
4
votes
3answers
8k views

What are lossless image format?

What are lossless image format?
4
votes
1answer
99 views

What is the easiest way to reduce the file size of a TIFF without losing too much of the image's quality?

I have a few high res TIFF files I'd like to reduce in size as they are currently around 20 MB, but need to get them down to no more than 10 MB so I can upload them to a website. Is there a way I can ...
4
votes
1answer
61 views

Acrobat / Illustrator: Grayscale images lose contrast on import

The original image I imported into Gimp, then converted it to grayscale by switching to grayscale mode. I exported it as Lenna-gray.jpg. After switching back to RGB mode, I exported again, as ...
3
votes
5answers
3k views

Why does saving low quality JPGs as high quality in Photoshop increase their file size?

I have a low quality background image that is about 85kb. If I open the file in Photoshop and then save it at 100% quality, the file size increases to 640kb. This doesn't make sense, the image is ...
3
votes
4answers
18k views
3
votes
1answer
2k views

Merging Layers Before Saving?

I read somewhere that before you save your photo you should merge the layers, including watermarks, before saving then save. My question is this: Is there any benefit to merging the layers (or ...
3
votes
2answers
4k views

Clipping mask retained in jpg file

I have a JPG which appears to of retained a clipping mask: (http://gdh.guildmembers.co.uk/logos/LEVENE%20MAG.jpg) When this file is opened in photoshop / fireworks and then the "Paths" tab is ...
3
votes
2answers
287 views

How to fill with similar colours?

I have this image that have been damaged by JPG, and would very much like to restore it, as if it had never been compressed with JPG. Can someone help me with this? I assume I need to fill with ...
3
votes
1answer
50 views

jpeg colours not displaying correctly in Chrome, FF and Safari

We seem to be experiencing issues with some of our jpeg product images displaying colours differently across different browsers. (When wrong, they look as if their hues have been shifted and vibrancy ...
3
votes
1answer
223 views

When resaving JPEGs, the file size increases, but the quality is not changed – why?

I was experimenting with JPEG quality loss upon resaving and noticed that not only (even after four resaves) did the quality not degrade (down to pixel level), but the file sizes actually increased by ...
3
votes
2answers
446 views

Why JPEG files saved in my digital camera are higher size vs JPEG files saved in my computer?

When I took pictures using my digicam, it saves those on higher size (over 1 MB) JPEG files. What I usually do is that I open them on some image editing application such as Paint (windows) or Preview ...
2
votes
4answers
2k views

How many times can I open and resave a jpeg until its quality noticeably drops?

This isn't a problem I'm currently facing, rather just a curious thought. I know that every time you open and resave a jpeg it will lose information, How many time could you do this until there is a ...
2
votes
4answers
3k views

How can we talk about the “resolution” of a JPEG file?

A JPEG is characterised with three parameters: width (pixel), height (pixel) and bit depth (bits per pixel). And resolution is a characteristic for output devices, e.g., monitors or printers. Why? ...
2
votes
1answer
1k views

Why does a JPEGs file size increase after cropping and saving for web in Photoshop?

When I save my image for the web in Adobe Photoshop, the produced jpeg is larger than the original jpeg file. The only alteration done to the image is cropping. How is this possible? I am saving the ...
2
votes
2answers
368 views

Large web background image - how to split into JPG and PNG part

On a website I'm working on, the design team wants a large background image. Uncompressed, it is several hundred kilobytes (both in JPG and PNG). Most parts of the background image are blurred, but ...
2
votes
2answers
226 views

Small JPEG image (just 21.8 KB) without lack of quality — why is that?

This image size is just 21.8 KB without lack of quality. Why is that? How is it done?
2
votes
2answers
3k views

Photoshop ruler guides embedded in JPEG image?

I saved an image of an iPhone from Google and when I opened it in Photoshop, it had ruler marks set in place around the phone. I've never seen or even heard of such a thing before. I thought it was my ...
2
votes
5answers
23k views

“placed” Photoshop images in Illustrator - blurry when saved as .pdf?

I've edited some images in Photoshop to be used in a .pdf I'm creating in Illustrator. In PS, the images looked great and were saved with the following settings: .jpg/CMYK/Image Options: 10/Maximum. I ...
2
votes
2answers
59 views

Transparency issue in Adobe illustrator when exporting JPEG

I cant figure out why my path which is at 100% opacity and above the red edge of my card, is showing through. I cant even think of how to google this error. I've expanded the "red card" it has a ...
2
votes
2answers
173 views

Animation over a static jpeg picture

I have a (simple) animation gif file (produced using gimp) and a static jpeg picture. I would like to put the animation gif file into the jpeg picture. How can I achieve that without losing the ...
2
votes
2answers
769 views

Is it possible to crop a JPEG image without losing quality for the kept part of the image?

Is it possible to crop a JPEG image without losing quality for the kept part of the image? Or phrase the the question differently: Is it possible to crop a JPEG image without compressing the kept part ...
2
votes
1answer
183 views

How does this image interleave from grayscale to color?

I came across this image (re-uploaded below) that seems to load with interleaving on. There is also another pass between the blue/yellow pass that is a lower resolution full-color version of the ...
2
votes
1answer
488 views

Illustrator CS6 Actions

Is there a way to create an export action in Illustrator where each time the action is run, it asks for a location to export to? I work on multiple projects where the exported JPEGs need to go into ...
2
votes
1answer
199 views

How do I make my *.jpg's border equal in InDesign?

I'm throwing together a newsletter InDesign that requires putting in JPEG images. It looks fine in InDesign but when I export the image to Adobe reader the borders on my images change so that one side ...
1
vote
2answers
325 views

My printer is asking me for a huge jpeg that makes AI run out of memory. How do I fix that?

I require a 10ft x 10ft banner. My printer asked HI-resolution .jpeg file in actual size (1:1), but when I make the .jpeg file, pop up show I get an error of insufficient memory. How much memory is ...
1
vote
4answers
8k views

how to import a mathematical equation in Corel Draw X5

I have a problem I could not solve. I am doing a poster in Corel Draw X5, and as it is a physics poster, I need to put mathematical equations in it. The Corel built in text editor is just completely ...
1
vote
1answer
1k views

Why does my compressed JPG have different colors from the original file?

I have no idea at all, first of all, of image internal composition and color modes. That said, I have a very strange problem. These are the pictures: Well, the ORIGINAL is more colorful in ...
1
vote
1answer
57 views

JPG file is more grey than file in Photoshop [duplicate]

Hi I'm new to this forum and I have a question. I am a fashion design student and at the moment I am retouching some pictures from a photoshoot. I like the colors I have in Photoshop but when I save ...
1
vote
1answer
87 views

How can I reopen my psd file and view the layers?

I saved my work as a jpg from photoshop but now i need to make edits to the file. How can I view th layers again in photoshop? I need to add a complete da
1
vote
2answers
66 views

How can I modify the image color to remove some color?

I have an image like this one: Is there a way that I can modify the colors of this image to remove some blue and make it into an image with just shades of grey?
1
vote
2answers
80 views

How can I increase my jpg from 72 dpi to 150 dpi and not have the printable size shrink?

I have to print some banners that will be 2'x3'. They will have different company logos on them sized as large as I can to fit on the banner, with 3 lines of text below. The problem is many of my ...
1
vote
2answers
103k views

Could not open JPG file in Photoshop [closed]

I download Image from an Internet and want to open this jpeg Image in Photoshop but I got an errorCould not complete your request because of a problem parsing the JPEG Data.
1
vote
4answers
23k views

Resizing/shrinking .JPG files without losing quality?

Im using Gimp to resize images. When using a high res image normally 4500 x 2994 i usually need to shrink this image to 325 x 130 pixels. As you can imagine i loose the shiny, glossy and high res ...
1
vote
1answer
42 views

resize image from original to different smaller sizes

Assume that I want to resize a large image (i0) into different smaller images (i1, i2, i3... where i0 > i1 > i2 > i3 ...) and keep the original ratio when doing the resize. I wonder which of the ...
1
vote
1answer
57 views

How can i make a vector from really small jpgs

i have really really small jpg images, and i want to know how can i make a vector in AI. They are like 31mm W and 14 H. Thank you so much, guys :)
1
vote
1answer
2k views

InDesign is changing the color of my image when I export!

thank you for reading my question, this is driving me insane. I have been exporting JPEG in InDesign, my settings are good (I think) but when I export it and open it, the color is darker!!! What am I ...
1
vote
1answer
984 views

Does it make sense to convert jpg image files to dng files upon import into Lightroom?

As far as I understand, converting input files to DNG is reasonable for Raw files only. Or is there any benefit if I convert jpgs to dng?
1
vote
0answers
422 views

Is there a way to preserve EXIF data when converting file from JPG to PNG?

I have following requirements: Convert JPG image to transparent PNG Preserve the tags given in JPG image and have it in PNG image as well. When I convert JPG image to transparent PNG, the EXIF ...
1
vote
0answers
337 views

How do you export a jpeg with a selective compression mask from Photoshop CC 2014?

In fireworks, I can select parts of an image to keep at a lower compression (85) when exporting, leaving the rest of the image to be compressed at the higher setting (60). I cannot find that option in ...
0
votes
4answers
262 views

Which raster image format is better for digitally displaying images when there is no transparency; JPEG or PNG?

I'm trying to determine which format is better to use when there is no transparency in an image. More importantly though, I'm trying to figure out when it's better to use one over the other. From ...
0
votes
3answers
10k views

Create jpg image with good quality

I'm trying to save a jpg image but it's getting a bit blurred. I have it nicely in my image editor, but saving the image is not giving the quality I need, even with max quality defined. If I save it ...
0
votes
2answers
125 views

Convert .JPG to Vector

Is there a way to convert a .JPG image in to vector format? I'm using Illustrator and I've tried that "Image Trace" but the result doesn't look any where close to my original. Plus, I cannot select ...