A novel tone mapping algorithm and hardware implementation for displaying wide dynamic range (WDR) images are proposed. The algorithm processes WDR images in a pixel-by-pixel fashion in the logarithmic domain, and it uses the block-interpolated minimum and maximum pixel values. The hardware implementation can achieve real-time processing of WDR images and is resource-efficient. Experimental results show that the proposed algorithm and hardware implementation can produce images with good brightness and high contrast.