TeriTerryTarry
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On my SJ4000 Wi-Fi there are menu selections for Image Size of 640 x 480 up to 4032 x 3024. In another thread I've already posted information about interpolation and I think I understand that pretty well, but then again . . .
I did an experiment where I took a photo of the same scene at each of the image size settings offered by the camera. All the photos are in 4:3 aspect ratio except the 2Mp is in 16:9. When looking at the photos in Windows Explorer (i.e., not in any viewer or editing programs) all the photos are the same size and angle of view except the 2Mp has a wider but shorter angle of view and the VGA 640 x 480 takes up less screen space. So the question is what do the camera menu selections actually do?
For example, if I select 640 x 480, that's 0.3 Mp. But which ones? Although the physical size of the image on my screen is smaller, it still takes in the same angle of view. If the camera has a 3Mp sensor, does that mean a 0.3Mp picture only uses 10 percent of the pixels but they're still spread out across the entire active portion of the sensor? Similarly which 41 percent of the pixels does the 1280 x 920 use? To get an image of the same physical size on my computer monitor or printed out on paper, has the image already been interpolated?
Furthermore, let's say you're going to print a photo on A4 or 8-1/2" x 11" glossy photo paper and it's an image that hasn't been cropped and enlarged. If the interpolated 12Mp photo has the same physical size as the 3Mp native resolution photo, what's the difference which one you print?
I did an experiment where I took a photo of the same scene at each of the image size settings offered by the camera. All the photos are in 4:3 aspect ratio except the 2Mp is in 16:9. When looking at the photos in Windows Explorer (i.e., not in any viewer or editing programs) all the photos are the same size and angle of view except the 2Mp has a wider but shorter angle of view and the VGA 640 x 480 takes up less screen space. So the question is what do the camera menu selections actually do?
For example, if I select 640 x 480, that's 0.3 Mp. But which ones? Although the physical size of the image on my screen is smaller, it still takes in the same angle of view. If the camera has a 3Mp sensor, does that mean a 0.3Mp picture only uses 10 percent of the pixels but they're still spread out across the entire active portion of the sensor? Similarly which 41 percent of the pixels does the 1280 x 920 use? To get an image of the same physical size on my computer monitor or printed out on paper, has the image already been interpolated?
Furthermore, let's say you're going to print a photo on A4 or 8-1/2" x 11" glossy photo paper and it's an image that hasn't been cropped and enlarged. If the interpolated 12Mp photo has the same physical size as the 3Mp native resolution photo, what's the difference which one you print?