You can't save transparency to a .jpg. The file format simply doesn't support it. Anything that is transparent will become white when saved to a .jpeg.
Try .png or .gif, those file formats do accept transparency.
JPG does not allow transparent backgrounds.
The only thing you can do is have a flat color background that would blend into your website: eg. if your website background is white, then have JPGs created with a white background.
Otherwise you need to consider saving as PNG, which does allow true transparency.
Because they are way better at compressing pictures that have lots of colours and irregular shapes, like photographs.
Have you tried the same epxeriment you did, but then with a photograph? The .png is most probably going to be noticeably bigger than any .jpg, regardless of the .jpg's compression factor.
.png picture, 110k
.jpg at 100% quality, ...
Any time a format isn't available in the Save As dialog, it means that format is invalid for the document in the state it's in. There's no such thing (as Lese and cwedge point out), as a 32-bit (or 16-bit) jpeg, nor a duotone, Lab or 1-bit bitmap jpeg.
Photoshop versions prior to CS5 would simply not show jpeg as an available option for 16-bit images, which ...
This in not blurriness, but the JPEG compression doing its thing. Strong colour contrasts between irregular shapes are always distorted like this by the compression in a .jpg. We call them 'artefacts'.
You could try to reduce the amount of JPEG compression. Increase the 'quality' slider when you export / save as a .jpg and the results should be better. The ...
JPEG doesn't support transparency at all.
Most compatible option is to use PNG, but results in large files for photographs because it is lossless compression.
Another option is to use the new WebP file format which supports both lossless (like PNG) and lossy compression (like JPEG), and allows transparency with both. Support for WebP is relatively good ...
It is entirely possible to have transparency with JPEGs with modern browsers. It is, however, complicated. It involves using SVG to create a clipping mask that handles the transparency. With Photoshop, you can do this with the pen tool, and then export to Illustrator, where you can convert the pen tool path into an SVG.
Here is a more detailed guide for ...
JPEG has backing from the photographic industry and predates PNG by a half-dozen years or so, while PNG was designed as a replacement for GIF, which was rather zealously protected by CompuServe. People were sued for using GIFs on their websites, for example, simply because they didn't use a program that was licensed by CompuServe to make those images.
In the Export dialog box, tick the 'Use Artboards' option. This saves the image including the containing artboard, what you're seeing as the white frame behind your logo.
If you need to re-adjust the white area (the artboard), hit Shift+O and drag the square handles which will appear at the edge of each side or at the corners.
Although the question was asked about Adobe Photoshop, the behavior is due to the lossy JPEG format and would be similar with any image editor.
Cropping a JPEG can make it less compressible, especially when the x and y offsets of the cropped area are odd numbers. This causes a re-subsampling of the color channels that can make the cropped image more complex ...
A JPG is a raster image with no concept of layers or history or anything of the kind that would let you revert it to a previous state or remove anything leaving what was underneath intact.
The only solution is to find the original file (version history in Dropbox or Google Drive comes to mind) or some other non-graphic-related technical solution.
Here is an article on exactly your problem. Been having this problem as well. Hope this helps!
Facebook uses a low quality jpg compression so any solid colors end up looking heavily pixelated. Solution is to add images at double the size with noise.
Having the same problem with a white text on a solid red background. My solution was to replace the solid red by a gradient of to reds. Afterwards I also added a Noise filter (or grain filter (7) in the filter gallery) in Photoshop. The improvement was very noticeable and the result was perfect. In attachment you can see the original and the finished result.
Lossless cropping of a JPEG image is possible using the
"jpegtran" application that comes with libjpeg; see
Quoting from "man jpegtran" on a system where jpegtran is installed:
.. lossless crop is restricted by the current JPEG format: the upper
left corner of the selected region must fall on an iMCU [8 or 16]
JPEG 2000 (also known as JP2) is an improved version of the original JPEG format (from 1992) that also has full support for transparency, but it has abysmal browser support (only Safari supports it).
I agree with Lucian, just use PNG, it is extremely well-supported, and there are many tools (pngcrush, optipng, pngout...) to compress files. See here for a ...
When saving images as .jpeg you always lose information. The dialog basically asks you how much information you would like to lose in favor of smaller size on disk (1 = most loss, 100 = least loss). There is no way to tell what you originally selected and the only use would be to have a history of your workflow because this loss is irrecoverably applied to ...
The bad news: With automatic tracing algorithms alone, you won't be able to get a clean result. There will always be noise.
The good news: If you're willing to invest just a bit of effort in manual cleanup, you can get a very decent vectorized reconstruction. This is what I was able to get in roughly 5 minutes:
(Click on the image for a high-res version or ...
Manly is correct that the file is linked, as it should be, and you can simply uncheck "linked" in the dialog when placing an image.
If you drag and drop an image directly in to your document (which will create a linked image) or have an existing linked image (It will tell you if an image is linked at the very left of the control panel when the image is ...
This is an outdated piece of advice related to using images in older layout programs that were not Photoshop-aware. It has no relevance to Save for Web. A jpeg is a flat file, and Photoshop takes care of the flattening (and conversion to sRGB for web use) automatically.
In general, practice non-destructive editing: never flatten a PSD, never change original ...
When an image is saved in Photoshop as .jpeg, .png, .tiff, etc. The file will also save the ruler (better known as "guides") information within it. I think Photoshop saves that info in a small portion of the file called metadata if I remember correctly.
My first, second and third answers to this question would be "Find a different printer, because the one you have is incompetent." There is no grande format equipment made that requires jpeg as input. Typical spec, this one from the Fuji website:
All popular desktop formats including PostScript 3, EPS, TIFF, PDF, both RGB and CMYK color spaces....
There is no simple answer - each compression event dumps some data, it tends to dump less with subsequent saves as most of the disposable data has already been disposed of. Factors include the compression level, the size of the image, it's content, your personal threshold of "noticeable" and the quality of your monitor.
I've seen a video featuring this. I'm not sure what it was anymore, but check out these 3 videos (from YouTube and Vimeo):
(The images aren't hyperlinked. Instead, there are linked texts at the bottom of each.)
1-Jpeg degradation by Connecticut State Library
2-JPG artifact test 1000 saves by Martin Flucka
3-Generation Loss by hadto
This last one by hadto ...
Something not mentioned in great detail is the way these compression algorithms work. JPEG is targeted directly at photographs where slight changes in pixel color are not noticed. PNG is targeted more for fabricated images that contain large areas of a single color where is compression is taken full advantage of like in your example of a huge all white photo ...
Yes! You can do this from command line (using the Terminal app) with ImageMagick.
After you install ImageMagick, navigate to the directory where your picture is located and run the following command:
identify -verbose yourimage.jpg | grep -i quality
Where yourimage.jpg is the name of the image.
And you should get the value which indicates the image ...
What you're observing is not a clipping mask, per se. Jpeg has no transparency and no concept of clipping or masking. Jpeg does have several metadata sections, and many programs will happily store extra information in there.
Photoshop stores paths, as you've noticed, and guides. To replicate this, create a new file and add some paths and guides. Then "...
If you really are sensitive to the quality then you should avoid JPEG. You already lost quality when the original image was saved as JPEG and nothing can bring this quality back. In general, you should avoid saving your documents out to JPEG unless you are shipping the images off somewhere in their final form.
It's hard to say whether the quality suffers ...
I would resave the TIFF file with LZW compression turned on. That should get the size down considerably.
If you are using Photoshop, you would simply "Save As", choose .TIF as your format and location.
After that you should get a dialog box (see below) with compression options.