"Keeping the quality" is a bit vague. Saving as a JPEG is the usual approach. Assuming you don't want to reduce the pixel count, changing the compression/quality setting during the save can effect file size changes. You'll have to look critically at the image to determine if your quality goals are met.
Probably not. Resolution is best measured by the height and width in pixels.. There are some lossless compression extensions, but the size it is reduced to depends on the image and how much space there is between un-similar pixels.
If you want a smaller copy keep the original and downsize the other. The real question is what do you intend to do with the image. Makes a difference if you want to make a poster sized image, a 4x6 print, or just view it on your monitor.
What type of image is it?
right now the files is a jpeg.. but I can save it as anything. I can alter the dpi, that doesn't matter. the image will be on the web, but when I reduce it to 72dpi, the text on it is too hard to read. the image will be uploaded to software, but the software needs an image under 1M, So really it doesn't matter what all I alter, as long as the end result is under 1M but still able to read. I've tried multiple compression software, but that doesn't seem to do much.
DPI is a printing term for dots per inch. For a screen it is ppi or pixels per inch.
The image size also has to do with how big the document is.
Click on image/image size and change resolution and document size and see what you get. Check it both ways with resample on an off.
Besides JPEG, I would also look at PNG, especially for quality.
I am with others in suspecting that you will not be able to accomplish such a file size reduction, but only you can rule on whether quality has been compromised too much.
Well you are talking about reducing the data by throwing away 59 data bits and keeping 1. At some point you will notice the difference.
You may have to increase the font size if the image itself is OK at the 60 or 120 (500k) to 1 reduction.
Perhaps it would be a good idea to ask how many pixels the image has in it in each dimension?
And just to be clear, because the terminology can be vague, do you mean by saying the file size is "60M" that it is 60 megabytes on your hard drive?
I wouldn't give up just yet. I believe we might be able to find a compromise in pixel count and compression amount that meets your goals.
If you are looking to "find how many pixels it has in each dimension", you'd look under "190M".
Your task to reduce to 500kb is impossible. No image that large belongs on a webpage.
If you reduce the width to roughly 1000 pixels and find that the text is unreadable, then you did not design the web page graphic properly. Start over on a document already sized for the web page. When designing web graphics, you should most always be looking at a 100% zoom view. Note the zoom percentage displayed in the image tab or image window title bar. Keep it at 100%.
The image I have is email from a client. Its not really a webpage its just a graphic. We are importing it into software that will then be embedded onto a webpage. So the client gave an image thats 190M pixel dimention. The software can only handle >1M sized file. So my issue is being able to get the image size down without givng the client a grainy image. I've tried chaning pixel dimension, document size, and I can ultimatley get it down to 2M without a huge lack in quality. It's when I start to go less than that, that the quality and clarifty starts to really suffer. I might be asking the impossible here, I just didn't know if there were any ways to reduce it, with the quality still being acceptable (readable text, not grainy)
If you're going to ask for help, you should answer the questions posed.
You were asked for the pixel dimensions. If you don't know how to find that info, go figure it out, or ask for specific instructions. Once specific instructions have been given, use them and get the info.
That's the only way you're going to get through this is by providing those who are trying to help you the information they need to do so. Details matter, and very few of us are mind readers.
It would even be helpful if you'd capture your screen showing your Photoshop editing session and post it here.
Carleenellen, I don't think you're going to be able to shrink the file size of your image that much without a reduction in quality.
This article is a good introduction to some relevant concepts: