ESTEC Photo Club

How to improve Contrast & Brightness in your Photos

Roberto Donadio TIA/TTG

Agenda

Basics of Photo EditingBrightness & ContrastHistogramLevels ToolCurves ToolQuestions & Answers

Spot the Difference

The image on the left has poor contrast, and it misses real blacks and pure whites.

Brightness / Contrast

This is the most basic tool, and the most intuitive to use for the less experienced ones.The two sliders basically do what it’s written on the tin.

HistogramDigital SLR cameras optionally display the histogram of the pictures taken.

Histogram

In statistics, a histogram is a graphical representation showing a visual impression of the distribution of data. It is an estimate of the probability distribution of a continuous variable

HistogramAn image histogram is a type of histogram that acts as a graphical representation of the tonal distribution in a digital image.It plots the number of pixels for each tonal value

The horizontal axis of the graph represents the tonal variations, while the vertical axis represents the number of pixels in that particular tone

Spot the Difference (2)

Levels ToolThe Levels tool can be used to adjust the white and black pointIt also provides a slider to set the mid-tone point.

Curves ToolCurves provides enhanced control over the distribution of contrast and brightness.Control Points can be placed to make sections of the curve slope steeper (increase contrast) or less steep (decrease contrast).

Q & A

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