Posting Pictures or The Never Ending Saga of How To
- Thread starter Madman
- Start date
I think the following might help
http://www.gscalecentral.net/Adding-Pictures-or-Files-to-Forum-Posts-m51661 < Link To http://www.forum.gscalece...orum-Posts-m51661
You can also find this by going to the News, Help & Competitions section at the top level menu, then go to Adding Pictures or Files to Forum Posts.
Hope this helps. Let me know if not and I'll try to help.
Don
http://www.gscalecentral.net/Adding-Pictures-or-Files-to-Forum-Posts-m51661 < Link To http://www.forum.gscalece...orum-Posts-m51661
You can also find this by going to the News, Help & Competitions section at the top level menu, then go to Adding Pictures or Files to Forum Posts.
Hope this helps. Let me know if not and I'll try to help.
Don
spike
It's me
Madman said:
282x212....thats tiny pixel size wise.
To get a smaller file, if your doing jpegs, after you have resized the pixels you save the quality at 70>80%.
This will bring the file size down quite a bit but you should be able to post pics of at least 640pixels wide.
Here is a pic of the moon that was originally 946x605 and 153kb in file size.
It has been reduced in pixel size to 640x409 and saved at 80% quality, the file is now 28kb.
a98087
Registered
I use
http://www.picresize.com/
nice and easy to use, and on there is the option to set max file size, you can also crop and set custom pixel height as well.
I generally just use the max file size and crop features
Dan
http://www.picresize.com/
nice and easy to use, and on there is the option to set max file size, you can also crop and set custom pixel height as well.
I generally just use the max file size and crop features
Dan
Madman said:
You might just regret asking. There is quite a bit of tedious mathematics involved, so here is a simplified version to hopefully answer your question.
If a image is 282 pixels by 212 pixels, there are 59784 pixels in the whole image. Obviously if you increase the image size there are more pixels. Its not uncommon for modern cameras to have 10 million pixels or more in a single image.
But there are two other major factors affecting the file size of the image.
Each pixel in a color image has a color and there can be 16.7 million colors available for each pixel. So the file size is the product of the image size (in pixels) and the color depth, measured in bits. It depends on the color depth of the original but it is often possible to make a huge reduction in the file size by reducing the color depth rather than making the image smaller. This will give a loss in color quality but it may not be readily visible and its often preferable to reducing the image size (in pixels).
Another compression technique is to define large areas of the same color, such as a blue sky, by an instruction to use color sky blue for the next say 5000 pixels, rather than include the value for sky blue 5000 times. Hence a view of the sky and sea could easily end up with the sea requiring most of the file, since waves etc change the colors of adjacent pixels. It all depends on the complexity of the image and is why some images achieve much greater compression than others.
The good news is that its far too complicated to work out in advance. Let the clever software do the hard work! But I would not recommend making the image smaller as an initial step. Use the software to reduce the quality (hence file size) but retaining an acceptable image.
Im not going to describe how bits become bytes and what Kbytes actually means. You don't need to know and its a topic for an electronics forum not Garden Rail. Just check the file size once you have reduced the quality or use software that allows you to set a target size. Your images are rather small in size (pixels) so you must have the color depth set to an excessive level.
If you get stuck, I can reduce them for you. Just PM and I will advise an email address to send the files.
Don