ofSimpleGuiToo - Showing ofCvColorImage, ofCvGrayscaleImage.

beginners
#1

Hi guys,

I was wondering what’s the best way to show elements like ofCvColorImage or ofCvGrayscaleImage inside ofSimpleGuiToo.

I tried showing a texture with videoGrabber.getPixels and it works but I’m not sure on how to do it with ofCvColorImage and ofCvGrayscaleImage. I tried to apply the same method but it does some funny stuff like cropping the image or showing it multiple times inside ofSimpleGuiToo’s element.

  
trackerColorImageTexture.loadData(trackerColorImage.getPixels(), trackerVideoGrabber.getWidth(), trackerVideoGrabber.getHeight(), GL_RGB);

Thanks in advance

#2

gui.addContent(myColorCvImage);
or
gui.addContent(myGreyCvImage);
or
gui.addContent(myOfImage);
or
gui.addContent(myOfTexture);
or even
gui.addContent(myContourFinder);
in fact anything that is drawable (i.e. extends ofBaseDraws) can be passed into gui.addContent

one warning though, the object must be allocated before you call addContent,

#3

Thanks for your reply.

I use:

  
ofCvColorImage  trackerColorImage;

…

  
trackerColorImage.allocate( trackerWidth, trackerHeight );

…

  
gui.addContent("trackerColorImage", trackerColorImage);

but get this error:

  
error: no matching function for call to 'ofxSimpleGuiToo::addContent(ofCvColorImage&)'

As if passing an ofCvColorImage as a parameter was not allowed. Hence my question about textures.

#4

weird, could you have a look at ofxCvImage.h, does ofxCvImage extend ofBaseImage?

  
class ofxCvImage : public ofBaseImage

if not you probably have an older version of openframeworks and/or ofxOpenCv

#5

Mine doesn’t extend it so that might be why. How funny, I’ll double check what’s going on.

Thank you :slight_smile: