Sunday, 29 September 2013

HDR using bracketed images

HRD

My starting images:











 To create a HDR image first you will need to set up your camera so it takes 3 bracketed images, this just means that 1 images will be 1 normally exposed, 1 under exposed and 1 over exposed. You then select the 3 images in adobe bridge and go to tools, photoshop and merge to HDR.
You now need to change your image to 16-bit or 8-bit to use it. To do this go to Image then Mode and 16-bit or 8-bit. An HDR conversion dialogue box will appear, select Local Adaptation from the drop down menu. The box will show a tone curve and histogram use the sliders to drag the highlight point and shadow point in to the edges of the histogram. You may also want to add some more points to your curve and adjust them to increase contrast.
You will then need to look at the Radius and Threshold sliders to try to avoid any halos in your image. It is likely that you will need to lower the radius amount by sliding to the left. Press Ok when done. You will then have your HDR image.
You can either add any adjustments in PhotoShop to finish the image or in Adobe Camera Raw. To do the latter, use Save As and save your file in the TIFF format. This will allow you to edit the image further in ACR. (ACR will not allow you to open a PSD file.)

Open the file in ACR. Depending on your image, move the Recovery slider to the right to bring back detail in the highlights — if you have clouds in the sky, this should help to make them more dramatic. You can adjust the Temperature if you wish and increase the Vibrancy. Drag the Clarity slider to the right to increase the contrast in the midtones, creating a sharper looking effect. Once you have made any adjustments you want to, click Open. This will bring the image back up in PS and you will want to finish by using the Unsharpen filter and then save back as a jpeg.

My HDR images


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