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For example, the foreground might be in focus while the middle-ground and background are out-of-focus. When avoiding deep focus is used specifically for aesthetic effect—especially when the subject is in sharp focus while the background is noticeably out-of-focus—the technique is known as bokeh .
Foreground detection, a concept in computer vision to detect changes in image sequences; Foreground and background in photography and cinematography, a principle important for Depth of field, the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image; Deep focus, a technique using a large depth of ...
Space – area that an artist provides for a particular purpose. Space includes the background, foreground and middle ground, and refers to the distances or area(s) around, between, and within things. Texture – the way a three-dimensional work actually feels when touched, or the visual "feel" of a two-dimensional work
Layering is a photographic composition technique that manipulates the foreground, subject or middle-ground, and background layers in a way that they all work together to tell a story through the image. [52] Layers may be incorporated by altering the focal length, distorting the perspective by positioning the camera in a certain spot. [53]
A conventional OTS shot always has at least three layers of depth: the foreground, middle ground and background. [5] [3] The inclusion of a subject’s shoulder, and often the back of their head in the foreground, adds depth to the frame. [2]
For example, the red channel may be f /2.4, green may be f /2.4, whilst the blue channel may be f /5.6. Therefore, the blue channel will have a greater depth of field than the other colours. The image processing identifies blurred regions in the red and green channels and in these regions copies the sharper edge data from the blue channel.
Foreground detection is one of the major tasks in the field of computer vision and image processing whose aim is to detect changes in image sequences. Background subtraction is any technique which allows an image's foreground to be extracted for further processing (object recognition etc.).
For example, if you are looking to a building that is in front of you and your eyesight is entirely horizontal then the picture plane is perpendicular to the ground and to the axis of your sight. If you are looking up or down, then the picture plane remains perpendicular to your sight and it changes the 90 degrees angle compared to the ground.