1. A method of encoding a high dynamic range (HDR) image of high dynamic range, comprising: obtaining three low dynamic range (LDR) images, each of said three LDR images providing a lower dynamic range depiction of the HDR image content, one of the three LDR images being normally-exposed, one of the three LDR images being over-exposed and one of the three LDR images being under-exposed; adjusting said under-exposed LDR image and said over-exposed LDR image by using a histogram alignment to improve the exposures of said under-exposed and over-exposed LDR images in a way which preserves details in normally exposed areas of each of said under-exposed and over-exposed LDR images; down-sampling said normally-exposed LDR image and said adjusted under exposed and over-exposed LDR images; arranging, in a frame, the down-sampled normally-exposed LDR image and additional data comprising the down-sampled under-exposed and over-exposed LDR images, wherein said down-sampled under-exposed and over-exposed LDR images are arranged side-by-side when the additional data and said down-sampled normally-exposed LDR image are arranged top-and-bottom, and the down-sampled under-exposed and over-exposed LDR images are arranged top-and-bottom when the additional data and the down-sampled normally-exposed LDR image are arranged side-by-side; and encoding the frame.