compression

this is a term that is used when you get a file and squash it into a file of a smaller size for example the file format jpg compresses a image into one that's the same but less quality this is a good way to save memory for other data.

file extentions
this is a specified as a suffix to the name by syntax by either a dot or space that idicates the format for the computer file here are a few examples (.png , .jpeg , .exe , .dmg , and .txt)

image capture
to capture an image you can use one of the following scanner tablet/phone or a digital camera you can find the best by looking how many mega pixels it has also.


optomising
this is a term that can mean improving you creation and but to do that you need to know what these following are:

• target image output-the way you want it to be
• bit depth-this is so your image can be a small size to take up less memory a good one would be 8 or 16 bit.
• resolution - this can also help save memory with the file but you can loose picture quality of your image it is also important if you want to capture a image of high qulity you  will need a good enough device to do so.
• dimentions- the dimentions is good to no when your saving as if its 2d you can save to psd/jpeg but 3d would have to be pla.

storage of image assets
this is things that you can store on but you will need to know what to save it as and know what to call the file. for example i wold save this picture as
a jpeg because is an image and it being compressed will save memory.