Picture of Buildings

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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 of Details in the Tree Leaves:

Location of Zoom-in below

Zoom-in into Picture by H18

Zoom-in into Picture by Olympus D580

Zoom-in into Picture by H10 taken at same time with H18 Picture above

The Olympus D580 zoom-in has more details in the leaves of the trees compared with the H18 zoom-in. The H18 picture looks blurrer than the H10 zoom-in.

Comparison of Edges:

Location of Zoom-in Below

Zoom-in into Picture by H18

Zoom-in into Picture by Olympus D580

Zoom-in into Picture by H10 taken at same time with H18 Picture above

Camera Model	Width of Vertical Line in above Zoom-in
H18	4-5 pixels
D580	2 pixels
H10	4 pixels

Location of Zoom-in Below

Zoom-in into Picture by H18

Zoom-in into Picture by Olympus D580

Zoom-in into Picture by H10 taken at same time with H18 Picture above

Sharpness Critieria:

There is a region of transition from white to green for the left edge of the white pillar in the zoom-in above. The number of pixels for the transition in the H18 zoom-in is 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
= edge transition in H18 / edge transition in D580 = 4 / 2 = 2

Ratio of effective resolution 
= effective resolution for H18 / effective resolution for D580 = 3 MPixel / 4 MPixel = 0.75

Therefore, the count of pixels that contributes to the sharpness of the image by H18 (3 MPixel image sensor) is 750 000.   
 

High Dynamic Range:

Location of Zoom-in Below

Zoom-in into Picture by H18

Zoom-in into Picture by H10 taken at the same time

There are more details in the tree leaves in the H18 picture compared to the H10. Many of the regions of the trees are too dark in the H10 picture.  

Both H18 and H10 were in auto mode when taking the pictures of this scene.
The camera settings used in both cases are the same:

Aperture Size = F / 3.5, Shutter Speed = 1 / 1433 sec, ISO = 100

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