hi.
i wanted to ask if anyone has ever made a file in the size for upload 900-950 pixels , make it the size of 2MB? (site limit)

i am asking because i always get files to be around 600k max..... and maybe i am missing something and get quality decented without knowing a better way to get high quality jpeg of 900 pixels with file size of over 1mb?

if anyone understand and has an answer ill be glad
thanks :)

I got one up to 750K once, quite pleased with myself. A TIFF of about 30M usually reduces to around 600k @950 pixels Adam.

JP

adam it may be the sharpening issue...
is there a big diffrence between the big size processed file and the submitted one?
your file size seems ok

Why do you want your files to reach the 2MB limit ? As far as I am concerned the files I submit are rarely over 500KB.

Don't you know that bigger is always better!!
It's because the limit is 2mg, so they think it must mean it will be better at 900 or 950 if I can just get the file to be 2mb...

... I'd be curious to see how a .jpg file width 950pix that sizes 2MB looks like... Maybe with some other images embedded and hidden in it ...:)

I think this is it right here. I think you'll find that the more local contrast in an image (or the more 'detail'), the bigger the file size will be, presumably due to the compression algorithm used in jpegs.

Personally, I'm horrified whenever photographs of a similar size that I save for publication on the web exceed 150kb. You can reduce the file size quite substantially before there's any noticable reduction in quality when the image is to be published on the web.

Regards,
Lee

I don't think that is possible. Then you would have to have some very fine graduation of color (that the compressing system actually recognize). It is just a limit..

thanks for the replies people.
i think i was not clear.

what i meant is i am afraid i have some bad post proccesing or resizing issues that affect my jpeg to be in bad quality.
i did not understand why would they give a 2MB size for files of 900 pixels in JPEG.
i said that my files are way less than 2MB and than i thought maybe all the others has great quality in 900 pixels JPEG that i am missing a way to shrink the photos , a minimal damage ti quality?

that's what i meant. is there a way i don't know that JPEG files get top quality? i wanted to know if everybody has the same file size as i do or is just that im doing it wrong and destroy quality when there is a better option.
because as far as i can tell for a 950 pixels JPEG they could have done a limit of 900kb files...... the 2MB seems too much....
that's what i said.

thanks :)

Adam, my master TIFFs are in 8 bit and around 30-35 MB @ 300 PPI. If I want to upload one to my website or 1X I 'Resize for web' in Elements 5. If I select 950 pixels wide it automatically resizes the pixel dimensions and scales the image down to 72 PPI for web use and usually comes out at around 500-600KB. At this size and scaling the JPEG looks perfectly ok for displaying on any website via a monitor.

If you are starting with a master TIFF in 16 bit and very big pixel dimensions then you could come close or exceed 2MB I would say. For example if you take a shot with a Hassleblad with a 39 Mega Pixel sensor and process in 16 bit you would have a very large file to compress to JPEG but for normal sized cameras it isn't really an issue.

Hope this clears things up a bit.

JP

I don't think the problem lies there. A file size at 500Kbit is very big for 900-950 pix longest side.
I'm always working in PSD or TIFF 16 bit, then resizing for web using Photoshop usually set to bicubic sharper. Then change profile to Srgb, and save for web.
The jpg compressing depends on the picture. Pictures with fine color gradients in darker areas needs max quality compression, but for web I've never seen any reason to go above quality 10 (100%) in photoshop.
I don't see what problem you get, any examples?

Add a digimarc and you will get close the 2MB limit (digimarcs look to the JPEG compression lie noise and can't be compressed very well). I think they just wanted to give some headroom for the uploads while maintaining a cap to prevent that malicious/corrupted files will bring down the whole site.

I was wondering about the same as Adam, but I think I got it clear from your replies... thanks! So that means that a filesize at around 500 kB is completely normal when saving the image for web?

Adam only asks if he is doing something wrong. IMO.