MATLAB: Why is there a smiley face when use imagesc

image processing

Hi,

I am doing normal image analysis. When use imagesc, a smiley face shows in the corner. Does it happen to anyone?

Best Answer

That is not a smiley face, it is a photo of Steve Eddins' eldest son:

https://blogs.mathworks.com/steve/2006/10/17/the-story-behind-the-matlab-default-image/

For some reason you have the default image data mixed up with your own data. Possibly this occured because you somehow added new image data to an already displayed image (e.g. perhaps after using hold on)... what MATLAB version are you using, and how are you calling imagesc ?

Related Solutions

MATLAB: Mysterious face appears after applying filter

imwrite(filtered, [filename '.jpg'], 'jpg');

You used image instead of filtered, and image is the name of a function to display an image; when not told what array of data to display as an image, the default for image() is the face of a boy.

MATLAB: How to resize an image for face detection

The vision.CascadeObjectDetector does not rely on you providing an image at a particular size.

That warning is only related to the image display. It is indicating that the image is too big for your monitor, and so MATLAB is displaying the image at a smaller size. This does not affect the face detection.

If you find that the faces you're looking for are not being detected correctly, I would suggest playing around with the MinSize, MaxSize and ScaleFactor parameters.

Best Answer

Related Solutions

MATLAB: Mysterious face appears after applying filter

MATLAB: How to resize an image for face detection

Related Question