Download Formation of a digital image : the imaging chain simplified by Robert D. Fiete PDF

By Robert D. Fiete

Making a electronic photograph is so uncomplicated at the present time that after we decide up our digital camera and push the button, we do not positioned any notion into the method that we simply set into movement. The chain of occasions that happens to create the picture is named the imaging chain. The scientists and engineers who layout electronic cameras like to dive deep into the physics and the math of the imaging chain, yet discussing the imaging chain with humans no longer good versed during this language will often produce a clean stare or a yawn.

This e-book discusses the thoughts used to layout electronic cameras for those that don't need to be blinded with equations and tired of geek converse. it is going to aid the people who paintings with digicam designers and wish to grasp, yet are often afraid to invite, why they retain babbling approximately an "MTF" or another mysterious acronym. when you ever questioned why pinstripe matches flip psychedelic on television or why crosses look on photographs of stars, the imaging chain provide you with the solutions, and this ebook is for you

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Formation of a digital image : the imaging chain simplified

Making a electronic photograph is so basic this day that once we choose up our digital camera and push the button, we do not placed any idea into the method that we simply set into movement. The chain of occasions that happens to create the picture is termed the imaging chain. The scientists and engineers who layout electronic cameras like to dive deep into the physics and the maths of the imaging chain, yet discussing the imaging chain with humans no longer good versed during this language will often produce a clean stare or a yawn.

Extra info for Formation of a digital image : the imaging chain simplified

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Note the contours that appear on the wall when there are not enough gray levels to allow for a smooth transition between dark and bright regions. The 256 gray levels provided by 8 bits are generally sufficient for good image quality, so this has become the standard used today with most digital cameras. Computers also like to store information in units of 8 bits, called a byte, so using one byte to span gray levels is convenient. An image using (a) 1 bit, (b) 2 bits, (c) 3 bits, or (d) 4 bits to span gray levels from black to white.

To help us understand how light passing through a wedge of glass changes direction, imagine a line of soldiers advancing through a large triangular patch of sand that is wider farther down the row of soldiers. Light changes direction as it passes through a wedge of glass, just as a line of marching soldiers needs to change direction to maintain a straight line when they encounter a wedge of sandy ground. Camera Optics: Taking Control of the Light 49 We can assume that because it is very hard to march in loose sand, the sand will slow the soldiers down when they cross through it.

To make it simple from a camera’s perspective, we can think of light as a wave while the camera collects it, but will think of it as a particle when we need to convert the collected light energy into a digital image. Light behaves like both a wave and a particle at the same time. It’s probably better not to think about it too much. 2 Light Interrupted Light travels happily through space until it encounters matter that it must interact with, similar to bumping into that strange relative that you were hoping to avoid at a family reunion.

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