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Chasys Draw IES Help:


raw-Photo Camera Setup
 

Camera Setup

The Camera Setup dialog allows you to fine-tune the processes involved in turning a RAW file into a usable picture. It's important to remember that the data collected from the sensor in your camera undergoes many processes before it can be used as a normal image, and a RAW file's contents are unprocessed data:

The camera setup dialog allows you to control these processes. RAW data is processed according to the settings you've specified in this multi-page dialog; you can apply your own preferences, e.g. apply custom white balance.

 

At the bottom you have a reload button; this reloads the image with the new settings you've specified.

 

White Balance

White balance is the global adjustment of the intensities of the primary colors (red, green, and blue) to render colors – particularly neutral colors – correctly; it changes the overall mixture of colors in an image and is used for color correction. This is essential because sensors do not match the sensors in the human eye, and the ambient viewing conditions of the acquisition differ from the display viewing conditions.

Cameras normally give you discrete settings, such as "Daylight" or "Indoors". You can use these if you want, alternatively, you can use the automatic setting or even apply your own custom preferences.

 

Interpolation Quality

This setting allows you to control the quality of the interpolation done on the RAW image:

Value Meaning
q0 Use high-speed, low-quality bilinear interpolation.
q1 Use Variable Number of Gradients (VNG) interpolation.
q2 Use Patterned Pixel Grouping (PPG) interpolation.
q3 Use Adaptive Homogeneity-Directed (AHD) interpolation.

 

Highlights

This option allows you to specify how highlights are handled:

Value Meaning
0 Clip all highlights to solid white. This is the default.
1 Leave highlights unclipped in various shades of pink. Not recommended.
2 Blend clipped and unclipped values together for a gradual fade to white.
3 - 9 Reconstruct highlights. Low numbers favor whites; high numbers favor colors. Try level 5 as a compromise. If that's not good enough, do level 9, cut out the non-white highlights, and paste them into an image generated with level 3.

 

Gamma

This setting allows you to control the way gamma correction is applied.

 

Thresholds

This sets the lower and upper thresholds for raw pixel data. The low threshold is used for wavelets to erase noise while preserving real detail; the best threshold should be somewhere between 100 and 1000.

 

Processing Options

These options control details of RAW processing, such as correcting aberration.

 

Dead Pixels

This option allows you to specify a list of dead pixels to be skipped over by the interpolator when the image is being generated.

 

Dark Frame

This option allows you to specify a "dark frame" to be subtracted from the raw data for the purpose of noise reduction. To generate a dark frame, shoot a raw photo with no light.

 

Next Topic

Making Adjustments

 

Copyright © John Paul Chacha, 2001-2017