PIV-OH Overlap

Hello all,

I am not new with Matlab but I am quite unexpert on dealing with imaging and overlapping.

I have a vector field from my PIV results and I want to overlap it on my PLIF image. Thus, I have a 3D matrix for the PIV (x,y,velocity) that I plot with quiver and a 2D image for PLIF (it is a .SPE file). When I overlap these just by using:

quiver(x,y,x_velocity, y_velocity)

hold on;

imagesc(PLIF_data)

I do not have a good math since the scales are different. How can I have the same scales for these two sets of data?

I do not think it should be a tough task for most of you but I am quite puzzled 'cause I am litterally brand new to this field

Thank you so much

Answer 1

[Francesco Pignatelli]

I have sorted it out.

Answer 2

[yanqi liu]

yes，sir，may be use

quiver(x,y,x_velocity, y_velocity)

hold on;

h=imshow(PLIF_data,[])

set(h,'AlphaData',0.5)

[Francesco Pignatelli]

Hello Yanq

Unfortunately it does not work.