Excuse me, what does the linear direction of digital photography mean? I hope to introduce some basic knowledge. The teacher mentioned it in photography class, but I didn't understand it.

Histograms are also called histograms and mass distribution maps. It is a statistical report chart, which shows the data distribution with a series of vertical bars or line segments with different heights. Generally, the horizontal axis represents data type and the vertical axis represents distribution.

Whether the photo has rich highlights or overexposure.

There are still full details and dark tones.

Or the details are not clear at all.

Perhaps there is no more valuable reference tool for photographers than histogram.

Nowadays, most digital cameras have built-in histogram display function.

Some are displayed separately, and some are displayed superimposed on the image.

When taking pictures.

You can start using histograms to understand the tonal range of the entire image.

Histogram can show the distribution of tones in photos.

Displays the number of pixels at each brightness level in the photo.

According to the shape of the image drawn by these values, the exposure of the photo can be preliminarily judged.

Histogram is the best feedback of photo exposure during shooting.

Photographers can know whether the photos are controlled within the ideal exposure range through it.

Theoretically, a well-exposed photo

Details should be very rich at different brightness levels.

There is a pixel distribution on each brightness value.

Like a rolling hill.

In order to facilitate observation

Divide the histogram into five regions.

Each area represents a brightness range.

On the left are extremely dark parts and dark parts.

The middle is the middle key.

On the right is the bright part and the extremely bright part.

Depending on the number of pixels in these different ilangd ranges

For high-profile photos (photos with bright colors and rich details)

The peaks should be concentrated in the bright area on the right side of the histogram.

For low-key photos (dark tones, pictures with rich details)

The peaks should be concentrated in the dark area on the left side of the histogram.

If the hills cover the whole area

Explain that the exposure is just right and the details are clearly visible.