How to set a custom white balance manually

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...

How to make local contrast adjustments to your photo

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....

How to sharpen photos to reveal important details

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,...

How to compress the high dynamic range of an image

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...

How to adjust the tone mapping for the HDR photo

When you are looking at the surroundings, perhaps some areas are very bright while some areas are very dark. The total range of values from the darkest areas to the brightest areas in a scene is defined as the dynamic range. Human eyes can adjust properly to see the...

How to adjust the shadows and highlights of the photo

You are charmed by the scene before you and want to get a photograph of it. But maybe whatever you do, the photo won't come out right. Some parts of the photo are slightly washed out or some parts are too dark. This is because the camera is only...