Hi, Any ideas regarding this issue?
On Thursday, July 16, 2020 at 2:24:54 PM UTC-7 [email protected] wrote: > Hi, > > I have two viewboxes as shown below. The one on the left is a PGImageView. > The one on the right is a PGGraphicsView. I used setXLink and setYLink to > link the two viewboxes. > > [image: image (7).png] > > On the right viewbox, I use drawKernel (PGImageItem) to draw a kernel at > the position of my mouse click within the viewbox. > > [image: image (9).png] > > In this example, I created a 5x5 kernel. This means that drawKernel was a > 5x5 numpy array. > > On the left viewbox, I use the coordinates associated with the boundary of > the mask to draw an overlay. The problem is that the overlay is always > smaller than the mask. A 5x5 kernel means the line segments that create the > square span 5 numpy array indices. > > However, the mask itself visually appears to span 6 numpy array indices. > This means that for a kernel of a given size (N x N), the corresponding > overlay will always be (N-1 x N-1). This becomes a big problem when working > with complex masks, such as the one shown below. > > [image: image (10).png] > > As shown above, the overlay doesn't exactly match the mask. Any thoughts > on how to solve this issue? Is there a better technique for taking a binary > mask in one viewbox and creating an exact overlay in a different viewbox? > > Thanks! > PaLab > > -- You received this message because you are subscribed to the Google Groups "pyqtgraph" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/pyqtgraph/5dd94b74-dd39-420b-897a-9d47fe63ca00n%40googlegroups.com.
