In order for the numbers recorded within a digital camera to be shown as we perceive them, tone curves need to be applied (see the tutorial on gamma correction for more on this topic).Ĭolor saturation and contrast may also be adjusted, depending on the setting within your camera. This is why the first and second images above look so much darker than the third. A digital camera, on the other hand, records differences in lightness linearly - twice the light intensity produces twice the response in the camera sensor. Our eyes perceive differences in lightness logarithmically, and so when light intensity quadruples we only perceive this as roughly a doubling in the amount of light. The bayer array is what makes the first image appear more pixelated than the other two, and gives the image a greenish tint. → Conversion to 8-bit and JPEG Compressionĭemosaicing and white balance involve interpreting and converting the bayer array into an image with all three colors at each pixel, and occur in the same step.
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