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In image processing computer graphics and photography
High Dynamic Range imaging is a set of techniques that allows a greater dynamic range of luminance
Between the lightest and darkest areas of an image than standard digital imaging techniques or photographic methods
This wider dynamic range allows HDR images to more accurately represent the wide
range of intensity levels in real scenes ranging from direct sunlight to faint star light
In order to create an HDR image first we have to locate and open our data files so let’s go to the File menu
Scroll down to Open double click on the Merge to HDR folder
Then select all four data files contained within the folder
When finished click on the Open button
By viewing each file you’ll see that each image has a different range of exposure
To create our HDR image lets go back to the File menu
Scroll to Automate and select Merge to HDR
In the merge to HDR dialogue box click on the Add Open Files button
Afterwards click on the Ok button
Click Ok again to see our results
To accept our changes click on the Ok button
Let’s do some more adjusting by going to the Image menu scrolling down to Mode and select 8-bits per channel
The HDR conversion dialogue box will open up in it click on the Method arrow and select Local Adaptation from the list
Expand the Toning Curve and Histogram section by clicking on the double arrow next to it
Now to balance out the tones in the image
Drag the point the point located in the upper-right corner of the chart to the left
Towards the edge of the gray histogram
Next drag the shadow point located in the lower-left corner of the chart towards the other edge of the gray histogram
When finished click on the Ok button