high dynamic range (hdr) photography. camera vs eye eye sees a wider range of color luminance than...
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High Dynamic Range (HDR) Photography
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Camera vs Eye
• Eye sees a wider range of color luminance than digital cameras
• HDR’s images compensate for this by combining three or more digital images
• Normal exposure, overexposed and underexposed, easy to do with midrange or better Canon cameras
• More than three images can be used, Nikon gear can do 5 or 7 easily
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Why three images?
• Normal exposure for camera’s best
• Over exposed gets stuff in shadows
• Underexpose gets stuff that is blown out
• Consider case of room with window looking out on bright scene
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Process in Photomatix or Photoshop
• Reduce HDR images colors to useable range of color values
• Raw HDR images look funny on computer screen
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When to Use HDR
• Scenic images
• Cityscapes, night and day
• Difficult lighting
• Your are not moving
• Subject not moving mostly
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HDR Process
• Take photos
• Create HDR in photomatix or photoshop
• Import into photoshop and maybe remix with original RAW images
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Photos
• Use tripod
• Aperture priority mode, f stop to get important stuff in focus f/11 to f/22?
• ISO 100 to reduce noise in process
• Turn on auto-bracketing -2,0,+2 stops
• Continuous shooting is nice and remote trigger
• Shoot RAW images
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Create HDR
• Generate single HDR from auto-bracketed images– In photomatix choose Generate HDR Image– Browse to select 3 bracketed images– Choose the option Align Source – Click Generate Tone Mapping
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Tone Mapping
• HDR needs tone mapping to display colors on monitor. Way too many colors at first.
• Every photo is different but as a start try:– Strength 100%– Color saturation reasonable– Luminosity, less contrast to right– Microcontrast I like a lot but play around– Smoothing “HDRness” of shot, middle 3
mostly
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Tone Mapping Continues
• White and Black Point, Gamma adjust to get histogram inside box
• Click Process
• Save when processed
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Photoshop HDR
• Open tonemapped jpg
• Process like any other image– Levels – Vibrance– Noise– Sharpen– And so forth
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Odds and Ends
• www.hdrsoft.com is photomatix site
• 15% off with stuckincustoms
• Can HDR a single image, just open file in photomatix and generate HDR