I am wondering if anyone knows how to delete multiple ROIs in the same general area of an image. I'm using Fiji.
I am looking for an easy way to delete all ROIs in a given area. For example, the multi-point selection tool has the ability to delete all points within a given selection. I would like to find a function like this but for ROIs.
I have many images like the one below (>100) with ROIs labelling cells. I only want ROIs to label cells in a certain region of the image (the barrel cortex) and would like to get rid of all other ROIs.
Would someone have an idea of how to write a macro to perform this function?
Any help would be greatly appreciation.
Thanks!
Related
I want to create a polarplot() on which I want to plot custom bitmaps/images as marker.
Also, I want to animate the polarplot() by updating these marker's location in regular time intervals(500milliseconds).
Please see the below attached image to get an idea what I want.
SamplePlotExample.jpg
I have made a similar application using 'polar()' and 'imagesc()'.
But I feel 'polarplot()' is better and recommended by Matlab.
Also there are so many customization options available with polarplot().
But I am unable to use imagesc() with polarplot because of some polar coordinate-to-cartersian coordinate conversion problem.
Pleas give solution.
Is there any other better methods to follow?
I'm trying to display liquid crystal directors using ParaView. The director is a spin-2 field that should look like a headless vector, centred in the middle, like the cylinders in this picture:
https://pbs.twimg.com/media/C8fj1bWXoAEFy5R.png
I know how to make an arrow filter, like this other picture, but it's not what I want:
https://summerofhpc.prace-ri.eu/wp-content/uploads/2013/07/arrows.png
I can't find the filter that will do what I need. Could you please tell me if I need to create a custom filter or if there's a quicker way to obtain this result within ParaView?
My data are expressed as 3D vectors within a VTU (unstructured grid) file.
Thanks in advance and sorry for the newbie question!
I'm using iOS-Charts with Swift to draw line charts, and I'm looking for a way to place a gap between the data points (circles) and the lines themselves.
Something like this: example
I've tried playing around with some values under the drawLinear section of LineChartRenderer.swift, but I don't know enough about Core Graphics to do anything useful.
Having a white outline for the circles is unfortunately not an option, since I'm displaying multiple datasets with images containing transparent layers, and the datasets need to be able to overlap (as in the example image)
Any help would be greatly appreciated - thanks :)
I have two CT image . How can I draw multiple ROIs on both image and calculate mean difference between each the corresponding ROIs with matlab ? I've used the 'imrect' or 'imellipse' but this commands creates the Mask which makes the image as binary image then I would have problem with to calculate mean difference .
How to show the images with the ROIs draw on them?
Not very sure about what you want to do with imrect. This is an idea; the way I would do it. You have to get your hands dirty with actual programming instead of GUI, but it's VERY basic stuff, and easy as soon as you understand indexing, which is very nice in MatLab and the thing you should take with you from this answer:
First of you define the size of your ROIs, which can be easily made with a variable
width=20; %or whatever you wish
height=10;
then define the multiple ROIs using their upper left corner for the position
ROI11=Image1(corner1:corner1+width,corner1:corner1+height); %(width and height eventually the other way around, whatever)
ROI12=Image1(corner2:corner2+width,corner2:corner2+height);
%...
ROI21=Image2(corner1:corner1+width,corner1:corner1+height);
ROI22=Image2(corner2:corner2+width,corner2:corner2+height);
%...
and then calculate the mean however you please, like for example:
Mean1=sum(ROI11-ROI21)/length(ROI11(:));
Mean2=sum(ROI11-ROI21)/length(ROI11(:));
%...
or something along those lines.
Give it a try and play a bit with it.
I'm a newbie to Matlab. I'm basically attempting to manually segment a set of images and then manually label those segments also. I looked into the imfreehand(), but I'm unable to do this using imfreehand().
Basically, I want to follow the following steps :
Manually segment various ROIs on the image (imfreehand only lets me draw one segment I think?)
Assign labels to all those segments
Save the segments and corresponding labels to be used further (not sure what format they would be stored in, I think imfreehand would give me the position and I could store that along with the labels?)
Hopefully use these labelled segments in the images to form a training dataset for a neural network.
If there is some other tool or software which would help me do this, then any pointers would be very much appreciated. (Also I am new to stackoverflow, so if there is any way I could improve on the question to make it clearer, please let me know!) Thanks!
Derek Hoiem, a computer vision research at the University of Illinois, wrote an object labelling tool which does pretty much exactly what you asked for. You can download it from his page:
http://www.cs.illinois.edu/homes/dhoiem/software/index.html