17-05-2021, 05:36 AM
A few thoughts.
If you need to crop and resize, I always crop first, to give the resizing a better chance to work without degrading quality too much. I think this is the right way round but others may differ.
What I'm pretty sure about is that file size reduction works better if you have a good quality original.
It pays to understand the difference between reducing the number of pixels and reducing the file size. You can reduce file size very effectively without reducing the pixel count. They are different operations. I think rIght click resizers do both at the same time.
For posting to forums, sending emails and suchlike I always use right click resizing unless I need more precise control. An example is scanning text and other pure B&W material. I scan at high(ish) resolution such as 300dpi. Then use Irfanview to reduce to 2 colour, literally black and white. Then save as GIF or PNG which are lossless. Sometimes allowing a small amount of greyscale (4 bits per pixel) gives a subjective improvement. I thank the late Terry Casey for educating me in this.
If you need to crop and resize, I always crop first, to give the resizing a better chance to work without degrading quality too much. I think this is the right way round but others may differ.
What I'm pretty sure about is that file size reduction works better if you have a good quality original.
It pays to understand the difference between reducing the number of pixels and reducing the file size. You can reduce file size very effectively without reducing the pixel count. They are different operations. I think rIght click resizers do both at the same time.
For posting to forums, sending emails and suchlike I always use right click resizing unless I need more precise control. An example is scanning text and other pure B&W material. I scan at high(ish) resolution such as 300dpi. Then use Irfanview to reduce to 2 colour, literally black and white. Then save as GIF or PNG which are lossless. Sometimes allowing a small amount of greyscale (4 bits per pixel) gives a subjective improvement. I thank the late Terry Casey for educating me in this.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
