Histogram
A histogram shows the brightness | → |
|
|
|
|
| |
|
|
|
|
| |||
distribution of an image. The |
|
|
|
|
| ||
pixels |
|
|
|
|
| ||
horizontal axis represents |
|
|
|
|
| ||
brightness (dark at the left and |
|
|
|
|
| ||
of |
|
|
|
|
| ||
bright at the right) and the vertical |
|
|
|
|
| ||
Number |
|
|
|
|
| ||
axis represents the number of |
|
|
|
|
| ||
pixels. |
|
|
|
|
| ||
The shape of the histogram |
| (Dark) | ←Brightness→ (Bright) |
| |||
before and after shooting tells you |
|
|
| ||||
whether the brightness and |
|
|
|
|
|
| |
Dark portions | Bright portions | ||||||
contrast are correct or not, and | |||||||
|
|
|
|
|
| ||
lets you decide if you need to use EV compensation and take the picture again.
Setting the Exposure (EV Compensation) 1p.101
Understanding Brightness
If the brightness is correct, the graph peaks in the middle. If the image is underexposed, the peak is on the left side, and if it is overexposed, the peak is on the right side.
| Dark image |
| Correct image |
| Bright image | |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
When the image is underexposed, the part to the left is cut off (dark portions) and when the image is overexposed, the part to the right is cut off (bright portions). This camera has a function where overexposed areas are indicated as blinking red and underexposed areas as blinking yellow.
Understanding Contrast
The graph peaks gradually for images in which contrast is balanced. The graph peaks on both sides but sinks in the middle for images with a large difference in contrast and low amounts of
31