how do I make a pic 100k

[OceanRider]

Hi all

Just submitting a pic to a contest and they want it 100K, how do I do this in PS. Any help?

J.

[tim]

Resize it to the size you're after, then choose "save as", select JPG, and hit ok. When the settings dialog comes up make sure the preview check box is ticked, then move the slider to the left until the size indicated is less than 100KB. It takes a couple of seconds for PS to estimate the size. You could also try "save for web" which sometimes makes photos a bit smaller.

If you can't get the size down low enough at your chosen resolution, reduce the resolution and try again.

[OceanRider]

thnaks for the tip but htis did not work. All the way to the left is still too big....and it says image quality that I am changing I just need a small pic. Any other ideas?

[Bodog]

What size in pixels are you starting with? You may need to re-sample down to a smaller size. Does the contest specify a size in pixels? 1024 X768, 800 x 600, etc. If you compress a large image too much, it will greatly reduce the quality. Better to reduce the pixel size first. (assuming that is appropriate)

[tim]

What I described above will work, you just have to follow all the steps, including the last line.

You have to decrease the resolution - ie choose image | resize. If they want 100KB or less you're probably going to need to have to make it 800*600 or less at medium to high compression. It's not going to be high quality, but it'll be fine for a web preview.

[Drk Orange]

There are two ways to reduce the filesize of an image.

The first is to throw away a lot of data by reducing the pixel-count. If your image will only be used for viewing on a monitor, there is no need for it to be larger than the screen resolution - for instance, 1024 x 728 pixels.

By halving the pixels in both measurements, you cut the file size down to a quarter as you have only 1 in every 4 pixels left.

Note, there are two types of file dimension reduction - one only tells your display program to squeeze it into the new size when displaying it - this does not change the file size at all.

The second way is to use compression. The most comon way to do this is to save the file in jpg format. You will have to expeiment with each image to work out how far you can compress it before you lose an acceptable amount of quality, but you would normally expect to reduce it to a tenth of ots original uncompressed size without much quality loss.

Images with lots of large similarly coloured areas can compress more than complicated patterned images.

[prime80]

As a test, I just took a full-rez HQ 3.22MB jpeg from my RebelXT and scaled it to see what would fit the 100K. Image size ended up being 800x533 pixels, and I had to use the "5" setting in the jpeg compression dialog box to get it to 99.9KB. If that size is adequate for what you need, those ought to be ballpark figures for your pic.

[OceanRider]

thanks guys, great help as usual!

Joel

[KevC]

To downsize a file, I always first.... resize... as in the dimensions of the image. Second, I use "Save As For Web" instead of "Save As". That gives you a preview and filesize, plus an array of options to optimize file size.

Good luck!