A low-pass filter attenuates the high frequencies, preserving only smooth variations in the provided image. The result of an image which is low-pass filtered is an image with blurred edges (hence certain details and noice are removed after the application of the low-pass filter). There are different low-pass filters: ideal, Butterworth, and Guassian.
However, I don't have an intuitive definition of range filters. Intuitively, how would you describe a range filter? How is it different from a low-pass filter?
I am more interested in receiving answers in the context of image processing (and computer vision), so you should assume that signals are images.