In an image browser for browsing a deck of hyperspectral images, the images of the deck are divided into square blocks each containing 25 pixels. The images are browsed by selecting foci of attention in selected images in sequence. Each time a focus of attention is selected, the image block containing that focus of attention is read out and displayed. Then if no new focus of attention has been selected by moving the focus of attention in the selected image or by changing the selected image, the image blocks surrounding the focus of attention in the selected image are read out and displayed in a spiral pattern until a new focus of attention is selected whereupon the process of read out and display starts again from the new focus of attention.