# Tag Info

20

Here's a really good case for the application of Okham's Razor. The simplest explanation is that the image was shot outdoors, under the midday sun. The blur was not added in post but is the result of the close shooting distance and relatively wide aperture of f/4. The fast shutter speed was required otherwise the shot would have been overexposed due to the ...

8

There's a limited amount of information on what the experiment actually is, so it's hard to give a full answer. If the question is updated with more detail I'll try to revise this answer. 1.I am thinking of having multiple cameras hanging on the top to capture the image. Can we control all the cameras to take picture at the same time and later combine ...

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My take on this: 3) For me the blurryness looks like it was due to the shallow DOF of short working distance and f/4. 2) Macro shots usually have small DOF due to the close working distance. With f/8 you would have more DOF, more of the image would be sharp. So it would not be the same picture. This is a matter of taste, my guess is that f/4 was used ...

2

If you're still out there, please check out http://reindeergraphics.com/. They have a product called Fovea 4 that is a series of photoshop plug-ins for fourier and other frequency domain transforms. Actually, you can do amazing stuff to images with fourier transform operations, including: (1) re-focus out of focus images (2) remove pattern noise in a ...

2

You have a function of the spatial coordinates (x, y), the coordinates of the original image. Suppose, for clarity, that we are talking about a value from 0 to 255 for each (x, y) point in your original image. The transform is a function, again from 0 to 255, of the momentum coordinates (k1, k2) . The point (0, 0) - the sun - corresponds to the intensity of ...

2

First, you have to calibrate the colors in the picture. You'll need a calibrated target such as http://www.bhphotovideo.com/c/product/651253-REG/X_Rite_MSCCPP_ColorChecker_Passport.html Then you can adjust the colors in the photo to match the target's calibration. Of course, the definition of color varies, and you get different values if you are using ...

1

I don't think you're going to be successful using photographs. You'll have too many variables. The light temperature, intensity, and overall quality will affect how the iris appears. The camera sensor will be another one. Even under the same lighting conditions, different sensors may record different renditions. Next, the RAW processor (or automatic ...

1

Guessing - as are we all. Camera is a D700. User had a bright fixed amplitude light source and wanted shallow DOF and good quality. They chose ISO 200 for quality. They chose f4 for minimum DOF. Given aperture and ISO, and light amplitude controlled, shutter speed was the remaining variable required to balance the exposure correctly. DOF seems about ...

1

It's very likely that a remote flash was used for this shot. A Macro shot doesn't necessarily determine a particular DoF. It's the aperture, focal length and sensor size. A smaller F stop results in a shallow DoF, while the bigger the F stop (remember, this closes the aperture) results in a wide DoF. No, closing the aperture will widen the DoF like in a ...

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