Fix 35mm conversion #1106
Fix 35mm conversion #1106
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| image_ratio = float(max(width, height)) / min(width, height) | ||
| is_32 = math.fabs(image_ratio - 3.0 / 2.0) | ||
| is_43 = math.fabs(image_ratio - 4.0 / 3.0) | ||
| if is_32 < is_43: |
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The wikipedia article mentions a definition that works for any aspect ratio in the "Calculation" section
"Converted focal length into 35 mm camera" = (Diagonal distance of image area in the 35 mm camera (43.27 mm) / Diagonal distance of image area on the image sensor of the DSC) × focal length of the lens of the DSC.
Should we use that instead so that we support any aspect ratio rather than picking between these two?
I guess the question is which definition do camera manufacturers use to fill the EXIF tag.
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Yes, but in the end, everywhere else in the code, we use a ratio of focal / width (and not focal / diagonal), so we'll have to specify this width anyway.
YanNoun
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Just rebased on master. |
This PR fixes the 35mm focal <-> ratio focal conversion :
Branch is on top of optim-large