1. A display method for high dynamic range images, comprising: displaying a high dynamic range image and a histogram panel on a screen, wherein the histogram panel displays low dynamic range data of the image in a center region of the histogram and high dynamic range data of the image in a left and a right region of the histogram, wherein the low dynamic range data presented in the center region of the histogram comprises data of pixels in the image specifying a brightness level ranging from 0 to 255, and the high dynamic range data comprises data of pixels in the image specifying a brightness level lower than 0 and higher than 255 presented in the left and right regions of the histogram, respectively; receiving input modifying the brightness of one or more pixels in the high dynamic range image; and adjusting the histogram to reflect the modified brightness of the one more pixels.