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CARTAvis / carta-archived

CARTA stands for Cube Analysis and Rendering Tool for Astronomy, a new visualization tool designed for the ALMA, the JVLA and the SKA.
https://cartavis.github.io/
GNU General Public License v3.0
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cf:CAS-9860 plotting contours slows down movie significantly #74

Closed kswang1029 closed 7 years ago

kswang1029 commented 7 years ago

Plotting contours slows down movie significantly. To feel it, try 1) open "M100_12m_CO_central.image.fits" 2) play movie only for the first loop and pay attention to the speed. 3) enable image settings and set contours: method=range, min=0.05, max=0.3, level_count=7, spacing=linear. Then hit "Add/update contour set" button. 4) play movie again and pay attention to the speed. The speed significantly drops and has impact on UX as plotting contours is an essential function to assist image inspection.

grimmer0125 commented 7 years ago

note: when enabling imageContext or imageZoom, will slow too.

grimmer0125 commented 7 years ago

@chyan26 , two candidates of the replacement of the current contour algorithm:

  1. DS9's contour algorithm. https://github.com/SAOImageDS9/SAOImageDS9/blob/d7ff6fa1f451f9c32a6caf80e91c679a17d7e3af/tksao/frame/fvcontour.C and it does not just connect each point and does some optimation.

  2. casaviewer's contour part which is using pgplot.

markccchiang commented 7 years ago

The solver of this issue is referred to #199.