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Comments: Comparisons with Other Cameras: Click here for same scene taken at the same time with MobiDV H10. Click here for same scene taken by Olympus D580. Comparison with H10:
The camera settings used to take the 2 pictures are: H18 Picture: Aperture Size = F / 3.5, Shutter Speed = 1 / 771 sec, ISO = 100 H10 Picture: Aperture Size = F / 3.5, Shutter Speed = 1 / 1433 sec, ISO = 100 Both cameras were in auto mode when takng the pictures. So, for this same scene, H10 used a faster shutter speed to take the picture. Click here for same scene taken previously by MobiDV H10 at a different time. Camera settings used for this 2nd picture are:
Sharpness Criteria using Edges:
Sharpness Comparison between H18 and D580: There is a region of transition from white to black for the left edge of the white panel in the zoom-in above. The number of pixels for the transition in the H18 zoom-in is 3-4 pixels while it is 2 pixels in the D580 zoom-in. Two pixel edge transitions is probably the best one can get from bayer image sensors. So, the picture taken with D580 is used as the benchmark for sharpness comparison with other digital cameras. The objective now is to find a quantitaive comparison of the sharpness in H18 pictures with respect to the D580. Ratio of edge transition in 1 direction
Ratio of effective resolution
Let Sharpness Discount Factor
for H18 compared with D580 Sharp Pixel Count Therefore, the count of pixels that contributes to the sharpness of the image by H18 (3 MPixel image sensor) is 750 000. Sharpness Comparison between H10 and D580: The number of pixels for the transition in the H10 zoom-in is 2-3 pixels while it is 2 pixels in the D580 zoom-in. Ratio of edge transition in 1 direction
Ratio of effective resolution
Sharpness Discount Factor
for H10 compared with D580 Sharp Pixel Count Comparison of Tile Patterns at the End of
the Pathway:
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