It is very challenging to synthesize a high dynamic range (HDR) image by using a set of differently exposed low dynamic range (LDR) images that are captured with moving objects. This is due to the fact that the moving objects cause ghosting artifacts in the synthesized HDR image. To remove these artifacts, an anti-ghost algorithm is necessary for detection and patching of motion regions, and th...

For producing a single high dynamic range image (HDRI), multiple low dynamic range images (LDRIs) are captured with different exposures and combined. In high dynamic range (HDR) imaging, local motion of objects and noise in a set of LDRIs can influence a final HDRI: local motion of objects causes the ghost artifact and LDRIs, especially captured with under-exposure, make the final HDRI noisy. I...

High dynamic range (HDR) image can faithfully present real world scenes to be widely utilized in surveillance, remote sensing, and space research fields. This paper proposes an effective scheme to synthesize multiple low dynamic range (LDR) images of a scene with different exposures to a single HDR image, and to manipulate the moving objects appearing in some original LDR images to enhance the ...

Sandra N. Moses1,2,3, Faith M. Hanlon4,5 and Jennifer D. Ryan3,6,7 1Department of Diagnostic Imaging, Hospital for Sick Children, Toronto, 2Department of Medical Imaging, University of Toronto, Toronto, 3Rotman Research Institute, Baycrest, Toronto, 4The Mind Research Network, Albuquerque, NM, 5Department of Psychology, University of New Mexico, Albuquerque, NM, 6Department of Psychology, Unive...

We consider the problem of developing colour sequences that offer the best dynamic range when used for pseudocolouring. We began with nine colour sequences currently suggested for visualization and informally compared them to discover which was subjectively seen to have the most pleasing visual aesthetic. This comparison indicated that different colour sequences are more appropriate for differe...

Tone-mapped images are the low dynamic range (LDR) images converted from high dynamic range (HDR) images. Recently, the objective quality assessment of tone-mapped images is becoming a challenging problem. However, there is no mature algorithm to deal with this issue until the tone-mapped image quality index (TMQI) was proposed recently, which is tone-mapped image quality index (TMQI). Unfortun...

Here we describe the use of high-dynamic range lighting techniques to improve the rendering quality of real-time medical simulation systems. Specifically we show our method of extracting the lighting information from an actual endoscopic light probe used for surgery and how we apply this lighting information into a real-time rendering system based on OpenGL and using Shaders to improve the real...

We present a technique for capturing the extreme dynamic range of natural illumination environments that include the sun and sky, which has presented a challenge for traditional high dynamic range photography processes. We find that through careful selection of exposure times, aperture, and neutral density filters that this full range can be covered in seven exposures with a standard digital ca...