Nikon D50 Users / Discuss

radiorabbi says:

Mikkel

the file size if you do the math and convert to Bytes is much more than 6

Each pixel has 3 colours , each colour 256 possible levels so each colour is represented by 1 Byte of data or 3 Bytes per pixel which brings you to 18MB . when you open the file you are given the option of opening it with 12 bit or 16 bit from a NEF

unless of course CS2 is actually displaying File size in Mpixels in which case the math is off base and you are just talking about the interpolation used to generate more pixels to represent the subject material
a general rule of thumb is to use the largest possible file size to work withso you end up with greater detail in your finished product.

good editing

Mike
Posted 55 months ago. (permalink)

psychofun    says:

radiorabbi:
i think mikkel is referring to the acr conversion. one can select different sizes for the developed image to be tranferred to ps.
Posted 55 months ago. (permalink)

sparkfish [deleted] says:

There is only 6MP (3000 x 2000) information available so when you select 8, 10 or 12 MP sizes for the final image I'm guessing ACR will interpolate colour & luminance between adjoining pixels. I tried it once, and the final results were not great, it increased noise and artifacts.

Not sure how it compares to a simple image enlargement in PS though, it might be interesting to find out.
Posted 55 months ago. (permalink)

radiorabbi says:

Thanks
I use Capture NX so am not all that familiar with PS and the related products
I know some versions will do an edit on 16 bit files for example

I guess i really shouldn't comment on this because i don't have enough info

i apologize

Mike
Posted 55 months ago. (permalink)

Mikkel Elbech    says:

Thanks for the input so far, guys! And yes, I meant the ACR conversion! :)
Posted 55 months ago. (permalink)

psychofun    says:

Real Word Camera Raw with Adobe Photoshop CS - Bruce Fraser - Peachpit Press, 2005
p.33,34 (Chapter 2 How Camera Raw Works)

Size
Camera Raw allows you to convert images at the camera's native resolution, or at larger or smaller sizes-the specific sizes vary from camera model to camera model, but they generally correspond to 50 percent, 66 percent, 100 percent, 133 percent, 166 percent, and 200 percent of the native size.
For cameras that capture square pixels, there's usually very little difference between resizing in Camera Raw and upsizing in Photoshop using Bicubic Smoother or downsizing in Photoshop using Bicubic Sharper. However, if you need a small file, it's usually more convenient to convert to a smaller size in Camera Raw than to downsample in Photoshop after the conversion.
For cameras that capture non-square pixels, the native size is the one that most closely preserves the original pixel count, meaning that one dimension is upsampled while the other is downsampled. The next size up preserves the pixel count along the higher-resolution dimension, upsampling the lower-resolution dimension to match and create square pixels in the converted image. This sue preserves the maximum amount of detail for non-square-pixel cameras, and it will typically produce better results than converting to the smaller size and then upsampling in Photoshop.
The one size up is also useful for Fuji SuperCCD cameras, which use a 45-degree rotated Bayer pattern. The one size up keeps all the original pixels and fills in the holes caused by the 45-degree rotation. The native pixel count size actually uses the rotation and filling in from the one-size-up processing, and then downsamples to the native pixel count.

Mikkel Elbech    says:

Awesome, thank you! :)
Posted 55 months ago. (permalink)