what is difference between digital image

what is difference between digital image and remotely sensed optical imagery

Answer 1

[Jan]

A "digital image" is an image store in digital form. This means a parameterization based on quantified parameters, e.g. colored pixels with a specified color map, or a vectorization after the image is segmented into areas, which belong together.

"Remotely sensed optical imagery" is a completely different story: Here the topic is the recognition of patterns or properties in "digital images". So while a "digital image" is an object, the "remotely sensed optical imagery" is a process or method.

And therefore the question does not make much sense. It is like: "What is the difference between an apple and eating apples".

Answer 2

[Image Analyst]

"Remotely sensed optical imagery" would be a collection (database) of digital images captured by satellites. To me, imagery generally means a bunch of images, while image is just one image. So the only difference is that digital images can be on any scene at all while digital remote sensing images are of a specific subject ( images of the earth).

[vipul utsav]

so no difference between remotely sensed image and digital image

[Image Analyst]

Just what they're looking at. Of course digital images come in a variety of formats: jpg, tif, png, dicom, etc. so they may have different formats, and pixel dimensions of course. What do you think? If you had to answer your own question, what would you say? It's just so obvious that I'm not really sure how to answer you. It would be like saying "what's the difference between Excel workbooks in general, and a workbook containing only the heights and races of all the people in my class?" I mean, what kind of a question is that?