Light is the core of photography and affects our photos in many ways. As a photographer, you may know two terms: hard light and soft light. Hard light and soft light create different qualities of shadows and transition between bright and dark. Hard light makes sharp edged shadows with...

Our eyes are unable to pick out many different levels of light and darkness. But they are much better at distinguishing different colors. In order to get the full photographic color on screen, we make use of the RGB model, which is a system to stand for colors. R...

Different light sources emit colors in different temperature ranges. If you shoot a photo under natural light, the photo will look cooler and have more of a blue tone. If you shoot a photo under incandescent light, the photo will look warmer and show up more orange. And if...

Human visual system works in a different way from cameras. Our eyes are extremely sensitive to brightness changes. The detail in a photo we can see is based on contrast rather than absolute tonal values. Contrast is the difference between the dark parts and light parts of the image....

You probably know the term "Sharpen" in the field of photography. Sharpness combines two factors. One is resolution. The higher the resolution of the image, the sharper it is. Another factor is acutance. It is a measure of the contrast at an edge. The more contrast the edge has,...

Dynamic range in photography is interpreted as the measurement between the lowest and highest values of luminance. LDR is short for low dynamic range. Plenty of images you see on the internet are LDR images. Their ratio of max luminance to min luminance may not reflect the scenes in...