When I capture video images scaled to half size or less, why don they look as good as the video captured at full size?
The short answer to this is that we use a different scaling algorithm than is used by inexpensive video cards. I believe our algorithm will give a better image quality for video which is captured and displayed as fields, not as frames. Unfortunately, both VideoForWindows and QuickTime capture video images as frames (with MJPEG the exception). We are working on a software patch which will allow you to choose between the two scaling algorithms. The long answer is that to scale video to half size (or less), our hardware and software scales every F1 and F2 field image by half (or more) both horizontally and vertically, then combines these two fields to make a frame. Because the single frame is generated from two fields representing two different points in time, the resulting frame shows interleave artifacts where there is motion in the images. If the resulting frame is scaled back up to normal size, the interleave artifacts are further exaggerated. We believe that some other video cards sc
