JMicroVision was designed to describe, measure, quantify and classify components of all kinds of images. It has an intuitive user interface with powerful features and supports very large images (more than 1 GB, even with a computer with little memory). JMicroVision contains tools having various degrees of automation in order to handle with complex and varied images. Like a microscope, it enables a dynamic observation of a specimen with the possibility of combining various focus or modes of lighting (polarized light, fluorescence …). Moreover, the magnifying lens and the multiview tool allow a simultaneous view of several images, each one having its own zoom coefficient while keeping a joint position in the center. JMicroVision has been developed especially to analyze high definition images of rock thin sections, but it can easily be used in other domains. Registration not required.