New answers tagged image-quality
I believe the problem you're asking about is green non-uniformity (GNU) It is typically caused by differences cross talk from adjacent pixels in column direction. The difference in sensitive of the adjacent blue or red pixel will cause differences in the exposure of green pixel in question. This is typically counter acted by maintaining two green gain ...
JPEG is a compressed format so the filesize does not correspond directly to the image resolution, but rather to it's content. The JPEG algorithm achieves lower filesizes with images that contain less detail, so if you have areas with very little detail, such as out of focus backgrounds or blown out skies then that can lead to dramatically smaller filesizes, ...
Based on the information you've given so far, I'm not yet convinced there is a problem. Assuming you mean 2-7 MB (Megabytes), not KB (Kilobytes), that file size could be consistent with a full resolution JPEG. 2-7 KB would not actually fit an image, except maybe a tiny thumbnail or icon. Look up the dimension of the image in pixels in your file browser - ...
Yess Sensor type affects image quality actually CCD sensors are expensive. it's more sensitive to light and delivers better ISO performance. where CMOS production process is more automated and its relatively cheaper so its used in more quantity. google the CMOS\CCD Image sensor layout
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