Hi. I am working on a project, and it seems that when I render my image, and save it as a jpg file the image comes out blurry. What can I do to fix this? When I render it in Blender it looks fine. Below is my image. Any help would be greatly appreciated.
in the render buttons set image quality to 100%
never set jpeg quality to 100% - the files are massive
If you don’t want any compression artifacts, save in a lossless format like targa or PNG
btw, PNG’s can be used on the web, if you didn’t know
wrong jpegs are some of the highest compression for quality! 100% is fine! i have huge 1024x1280 high detail 32bit color images in codec form that take up only 200kb and smaller ones (<800x600) don’t ever exceed 100kb whereas png and gif or targa especially take up over 500kb sometimes!
a fully compressed (that is, in pngcrush) PNG is very small and has no loss.
that is the best way to go, imho.
I save images as jpeg. with the default quality and most come out quite fine, could be how you compress them.
wrong jpegs are some of the highest compression for quality! 100% is fine! i have huge 1024x1280 high detail 32bit color images in codec form that take up only 200kb and smaller ones (<800x600) don’t ever exceed 100kb whereas png and gif or targa especially take up over 500kb sometimes![/quote]
It’s not 100% quality if its compressed, unless you used a lossless compression, in that case I REALLY doubt it’s lower than the PNG counterpart.
1024x1280x32bit is 5 MB of data at 100% quality (which is RAW data. It’s probably more than that actually because of the JPEG header).
Martin
So is the consensus that I should try saving it as a PNG file? Is color choice a factor? I’ve created other similar images, and they all look fine but they are in a different color.
JPEG seems to be better wrt size for photos or pictures with large amounts of colour variation and pngs for solid colours like screenshots. But you should get into the habit of always using lossless formats for renders because you can always compress them for the web i.e. convert png->jpg. You can’t go the other way without getting artifacts.
I never render to JPG. I use PNG because it gives the best compression out of all the lossless formats. Even when doing animation, I render to a PNG image sequence and then load that into quicktime to save as an animation movie. Lossless all round. After that, I can compress how I please and it gives you better options for post-processing.
Please forgive me but I’m still a little new to this. Can you tell me which formats are considered lossless? It sounds like PNG is one. Are there others? Are their any compatibility issues with images created for viewing in a web browser?
The only compatibility issue that I know of for the major image formats (JPEG, PNG, and GIF) is that Microsoft Internet Explorer has poor support for PNGs (it doesn’t display a 32 bit PNG’s alpha channel properly). I found something to see if your browser supports 32 bit PNGs here. But IE displays 8 bit and 24 bit PNGs just fine.
“Lossless” means that no information is lost when its compressed. ZIP files for example are lossless because when you extract them it’s exactly the same as it was when you compressed it (otherwise what would be the point?)
PNG, TGA, GIF and BMP are all lossless images (BMP isn’t compressed though) - of these PNG and GIF can be displayed in a web browser, but GIF isn’t as good (it can only go up to 8-bit colour) and there’s licensing problems with saving to GIF. As mentioned, IE has problems with PNG’s with transparancy, but handles fully-opaque PNG’s fine.
JPEG is lossy compression, as information is lost when it is compressed - reducing the resolution or bit-depth are also examples of lossy compression. They can be smaller than lossless compressed images, but at a drop in quality.
lossless saving is great if you plan on going editing in another program and extend your work beyond blender… if your just rendering an image to post about… jpg is just fine and is often the most widly supported format… and. if later you should need a lossless render… you still have your blend file to pull one off of. 
any ways… the fuzzy pixelation you are experienceing IS because of the jpg format… it cancels out some info to compress it… and that loss of info fuzzifies it… the more you compress it… the lower the “quality”… simply put… rhender it at the default 90% and you shouldnet have any noticable problems.
www.dfstormbringer.deviantart.com if you need any proof against that.
Hi !
I am not sur to have well understood the topic (I am french) but is the rendered image blurred or pixelated? It is not the same at all.
I had a similar problem, and it was not at all a problem of picture format or quality!
On a simple image, I had the Filter parameter of the Texture-Image panel set to a value superior to 1.0 and the result was a blurred texture.
In a complex scene it is easy to see wher the problem comes from, but in your example (a simple object) you can believe that it is a rendering problem instead of a texture parameter problem.
Am I out of the topic?
Philippe.