Image sizes and graphics packages

[<k>]

It's interesting to see the dimensions of images compared to their size in KB.





Image by Pabitra - size 102 kb.





Image by chrisild - size 42 kb.





Screen capture by <k> - size 118 kb.

I still use PaintShopPro 2000.  Generally I use the "compress" function. For a small image, I compress by around 18%, for medium images from around 24% to around 32%, but around 40% or more for very large images. Normally you can't tell the quality difference if you use the compression function wisely. It would be interesting to hear about your methods. Perhaps not all graphics packages include compression functions these days, but that leads to a lot of wasted space when small-sized images get uploaded with heavy file sizes.

[malj1]

I use Microsoft Office picture Manager which always gives good results.

[<k>]

With PSP, I can reduce the picture size (how much space it takes up on the screen), and the amount of detail (by using the compression function), which also reduces the file size (KB usage). Does Microsoft Office Picture Manager also have a compression function?

[malj1]

Yes it has both settings; the resize you can increase or decrease to any size (within reason) or compress to three fixed sizes - the web page size I normally use. Usually around 30kp

[<k>]

Looks good. With PSP, for jpgs you can set the compression value from 1 (low) to 99 (high), and the function tells you roughly how many kb your resultant image will be.

[malj1]

This can be checked also in a roundabout way by opening in compress [without compressing] and the size is shown in kb

[Bimat]

It's not only about pixel size of the image. If you save it with '.jpg' or '.jpeg' extension, it takes much lesser size. A '.png' extension means much higher size, even if the pixel size is exactly same.

Aditya

[Pabitra]

Malcolm
Do you have any suggestion for any App under iOS?

[malj1]

I have no idea about Apple as I only use Windows10 and a Samsung Galaxy phone.

[Levantiner]

It's not only about pixel size of the image. If you save it with '.jpg' or '.jpeg' extension, it takes much lesser size. A '.png' extension means much higher size, even if the pixel size is exactly same.

Aditya

Every time you open and re-save a Jpeg you loose information. Jpegs are not  ideal for long term storage of Photos, Tiff is a much more reliable file format.  My camera produces 128mb (uncompressed raw)   Photos. I Process those in Capture one Pro 10  and for posting on line  I use Photoshop elements.    The issue I have with this forum the reduction needed to post sees a substantial degradation in image quality.