From photon to pixel : the digital camera handbook by Henri Maître

By Henri Maître

The camera conceals outstanding technological recommendations that have an effect on the formation of the picture, the colour illustration or computerized measurements and settings.

** From photon to pixel photon ** describes the gadget either from the perspective of the physics of the phenomena concerned, as technical parts and software program it makes use of. in accordance with the perceptual homes of the visible approach in addition to on common transmission and illustration, analyzes the ideas to satisfy the calls for of the photographer at the improvement, distinction, white stability or stabilization of image.

 The complicated architectures followed in cell phones and advancements of computational images also are provided, foreshadowing the good points of the longer term device.

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From photon to pixel : the digital camera handbook

The digicam conceals awesome technological concepts that impact the formation of the picture, the colour illustration or computerized measurements and settings. ** From photon to pixel photon ** describes the gadget either from the perspective of the physics of the phenomena concerned, as technical elements and software program it makes use of.

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The scales on the two axes are in millimeters. The focal length is fixed at 50 mm. 5, 1 and 5 m, as well as two apertures of the diaphragm: N = f /4 and N = f /8. On the left, in a log-log plot of the focal point F at a distance of 100 m, On the right, in a semi-log plot. zip 28 From Photon to Pixel The main points of these findings relate to the central role of the focal length as well as of the numerical aperture. Thus, it can be seen that in ordinary photography (that is to say outside micrography), the important blurs are those located in front of the focal point, because those that are behind have a more limited extension.

We build a camera. Between conjugate planes of the lens, all the rays issued from an object point M converge at an image point M (approximated stigmatism of the lenses in the paraxial approximation). This solves the problem of the energy since the whole aperture of the lens is now used to capture the light issued from M . This gain comes at a price with the selectivity of the object planes that are First Contact 15 clearly seen: only those that are close to the plane of the screen are sharp, the others will be more or less blurred.

8). In addition, these assemblies sometimes make it possible to vary the focal length f and thus to achieve zoom functions. Centered systems are said to be “dioptric” if they only make use of lenses. If they also make use of mirrors, they are called “catadioptric”. In photography, the vast majority of objective lenses are dioptric, only very long focal length objectives utilize mirrors in order to be less cumbersome. A word should be said of these folded lenses before exclusively dedicating ourselves to dioptric lenses later in this chapter.

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