Merge Bracketed Exposures into HDR in Photoshop

This guide provides a complete, step-by-step workflow for combining bracketed exposures into a single high-dynamic-range (HDR) image using Adobe Photoshop. By blending underexposed, standard, and overexposed frames, Photoshop captures the full spectrum of detail from deep shadows to bright highlights. The following sections walk through importing source files, configuring merge settings, eliminating motion artifacts with deghosting, tone mapping the merged file, and finalizing the image for export.

1. Import Bracketed Files into Photoshop

Begin by organizing your source exposures (typically three to five RAW or JPEG files shot on a tripod at varying exposure values).

  1. Open Adobe Photoshop.
  2. Navigate to File > Automate > Merge to HDR Pro.
  3. In the dialog box, set the Use dropdown to Files or Folder.
  4. Click Browse to select your bracketed shots.
  5. Check the box labeled Attempt to Automatically Align Source Images to correct minor shifts between shots.
  6. Click OK to load the files and initiate the HDR processing engine.

2. Configure the Merge to HDR Pro Settings

Once the files are processed, the Merge to HDR Pro window displays a preview and a thumbnail strip of each exposure.

  • Set Bit Depth: Choose your bit depth in the top-right corner.
    • Select 32 Bit to preserve the full dynamic range for non-destructive grading later in Camera Raw.
    • Select 16 Bit or 8 Bit if you want to perform tone mapping directly inside the HDR Pro dialog using built-in sliders.
  • Remove Ghosts: If your scene contains moving elements like tree branches, water, or pedestrians, check the Remove Ghosts box. Photoshop will select a single reference frame to eliminate transparency artifacts. You can click any thumbnail in the bottom tray to set it as the ghosting reference.

3. Apply Tone Mapping (16-Bit / 8-Bit Workflow)

If working in 16-bit mode, select Local Adaptation from the Method menu for complete tonal control:

  • Edge Glow: Adjust Radius and Strength to balance local contrast without producing halos along high-contrast borders.
  • Tone and Detail: Fine-tune the Gamma and Exposure to set overall brightness. Increase Detail to enhance micro-contrast and texture.
  • Shadows and Highlights: Use the sliders to recover hidden details in the darkest and brightest areas of the frame.
  • Color: Adjust Vibrance and Saturation to refine color intensity.

Click OK to render the merged image onto the Photoshop canvas.

4. Alternative: 32-Bit Camera Raw Workflow

For superior control and modern color grading, many photographers prefer the 32-bit route:

  1. Select 32 Bit in the Merge to HDR Pro window, leave the tone curve flat, and click OK.
  2. Go to Filter > Camera Raw Filter (or convert the layer to a Smart Object first to ensure non-destructive edits).
  3. Use standard Camera Raw controls—such as Exposure, Highlights, Shadows, Whites, and Clarity—to balance the scene with access to the full raw data.
  4. Click OK when complete.

5. Final Retouching and Export

With the dynamic range balanced, apply final touches in standard Photoshop workspace:

  1. Add adjustment layers (Curves, Levels, or Color Balance) for global adjustments.
  2. Remove any sensor dust or residual artifacts using the Healing Brush or Clone Stamp tool.
  3. Save the master file as a TIFF or PSD to retain full layer history.
  4. Export the finalized image by navigating to File > Export > Export As, selecting JPEG or PNG, and embedding the sRGB color profile for web and print display.