Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Color Intensity Projections: A simple way to display changes in
  astronomical images   To detect changes in repeated astronomical images of the same field of view
(FOV), a common practice is to stroboscopically switch between the images.
Using this method, objects that are changing in location or intensity between
images are easier to see because they are constantly changing. A novel display
method, called arrival time color intensity projections (CIPs), is presented
that combines any number of grayscale images into a single color image on a
pixel by pixel basis. Any values that are unchanged over the grayscale images
look the same in the color image. However, pixels that change over the
grayscale image have a color saturation that increases with the amount of
change and a hue that corresponds to the timing of the changes. Thus objects
moving in the grayscale images change from red to green to blue as they move
across the color image. Consequently, moving objects are easier to detect and
assess on the color image than on the grayscale images. A sequence of images of
a comet plunging into the sun taken by the SOHO satellite (NASA/ESA) and Hubble
Space Telescope images of a trans-Neptunian object (TNO) are used to
demonstrate the method.

32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci