use opengl in matlab , why it so slow?

when I draw an image in figure using imshow with transparency property,The figure 'render' property changes to 'opengl' mode automatically,Then the figure reponse begin very slow！ what is problem?

Answer 1

[Walter Roberson]

Try using the command

opengl software

and see if it is any faster.

The OpenGL renderer is the only one that supports transparency. If you do not have a fast graphics card or do not have fast memory, then OpenGL can be slow.

What kind of graphics card do you have? If it is NVidia based, then when was the last time you checked to see whether there was a newer NVidia driver for the card?

[ldd]

thnak you for your help!

my graphics card is ATI Radeon HD 3450 (256 MB), I have tried command

'opengl software' ,but it is still very slow!, Is the graphics card too slow?

[Walter Roberson]

To be honest... Yes, that card is bad news for anything more than office graphics.

http://www.techwarelabs.com/reviews/video/ati-3450/index_8.shtml

http://www.videocardbenchmark.net/video_lookup.php?gpu=Radeon+HD+3450

You can get three times the performance for half the price, or 10 times the performance for the same price.

Answer 2

[Daniel Shub]

You can also see how your video card stacks up with

bench