Objective quality assessment of tone-mapped images

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – Tone mapping operators plays an important role to compress high dynamic range (HDR) images to low dynamic range images. High dynamic range images have plenty of applications especially in space and medical fields. For visualization of HDR images on standard low dynamic range (LDR) display devices becomes a valuable issue, which develops a variety of tone-mapping operators(TMOs). To compare different LDR images which are created by TMOs researchers provided a subjected rated tone mapped image data base. And later they developed a full reference objective tone-mapped image quality index (TMQI). TMQI method based on success of two design principles in image quality assessment literature. TMQI evaluated on measurement of multi-scale signal fidelity and statistical naturalness. Instead of that in this paper considering basic property of HDR images about details preservation mainly taken in to account. With it deduce that high quality tone-mapped images are capable of showing more details. Therefore we can propose a blind quality metric by estimating the amount of details in generated image by darkening or brightening original tone-mapped image. Experimental results confirm that proposing method despite of no reference is robust and statistically give better results than TMQI method.