For pictures intended to be viewed online, VGA resolution is usually sufficient. Desktop monitors display resolution is usually less than pixels per inch, so at a 4" x 6" size, a high resolution picture will not appear any sharper than a VGA picture.
Some mobile devices have higher resolution screens, but as the screen is smaller the end result is the same. As a general rule, pictures should be taken at the highest resolution possible for the camera. The VGA setting is not suitable for pictures that will be printed. Starting with a high resolution also allows you to crop a photo with minimal loss of detail. For example, if you start with a picture that is 4 megapixels and crop away half the picture, the remaining image is still a reasonable 2 megapixels, suitable for printing.
Placing higher resolution images online allows viewers to zoom in on details, and higher resolution images will be sharper on near-print quality displays such as the Apple Retina series. High resolution images can be made smaller by image editing software when smaller file sizes are required.
Small fonts readable. Image using a 2 mpix camera Partial image x pixels from 2 megapixel image, 1to1 representation. Very fine image structures such as component inscriptions unreadable. Image using a VGA camera Even coarser structures are already roughly pixelated and no longer identifiable.
Common sensor resolutions for C-mount cameras are mostly between VGA resolutions x pixels with 0. Higher resolutions of approximately 12, 16, 20 or even 29 megapixels or much more , as they are used today in consumer cameras, are not available for C-mount cameras in machine vision because the individual pixels are far too small and the image noise is far too strong in order to measure and inspect in high quality.
VGA is equivalent to 0. VGA cameras are still useful in several applications. Digital cameras are typically identified by a megapixel rating that denotes the highest resolution of the images they can capture, in pixels.
Visual graphics array resolution is pixels wide by pixels high. VGA can indeed support p. VGA is an older standard that carries only a video signal.
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