Скачать или смотреть Image Contrast Why High Dynamic Range Is Key!

https://rigaku.com/
The video introduces contrast as a key aspect of image quality, differentiating between low and high contrast, and highlighting the need for high contrast along with a wide dynamic range for optimal image quality.
[12:58-12:59]
The video begins by asking about contrast in images.
Now, what about contrast?
[12:59-13:09]
The image displays a low-contrast image with limited gray level variation, making it difficult to see features.
This is a low contrast image. You don't have a whole lot of variation of the gray level, which makes it difficult to see some features.
[13:11-13:28]
A high-contrast image is shown, which lacks sufficient dynamic range, with only four levels of gray.
This image is high contrast, but it's got its own problems. So you have only 4 levels of gray, black, dark gray, light gray, and white, to describe the difference of densities, so that is not enough of a dynamic range.
[13:28-13:34]
The video compares a butterfly image with low contrast and low dynamic range, illustrating the issues caused by low dynamic range.
So when you have a low dynamic range image like this one, that can cause some problems too.
[13:36-13:41]
The ideal image is demonstrated: high contrast and high dynamic range.
What you want is high contrast and high dynamic range image like this one.
[14:09-14:21]
The narrator summarizes that resolution, contrast, and noise level are the three important factors of image quality.
So resolution, contrast, and noise level are the 3 important factors when you think about image quality. And in ideal situation, you will have them all.