ImageSubsampling ImageSubsampling VPARAMETER 5324 Factor used to subsample the greyscale image in the tool region of interest. With a subsampling factor of 1, the greyscale image is not subsampled. With a subsampling factor of 2, the greyscale image is subsampled in tiles of 2x2 pixels. With a subsampling factor of 3 the greyscale image is subsampled in tiles of 3x3 pixels, and so on.
Syntax Micro V+ VPARAMETER (sequence_id, tool_id, 5324, index_id, object_id) = value value = VPARAMETER (sequence_id, tool_id, 5324, index_id, object_id) V+ VPARAMETER (sequence_id, tool_id, 5324, index_id, object_id) $ip = value value = VPARAMETER ($ip, sequence_id, tool_id, 5324, index_id, object_id) Remarks Increasing the subsampling level reduces the number of pixels and the quantity information analyzed Color Matching Tool by the tool. Increasing the Image Subsampling may reduce the execution time but affects the accuracy of color matching results.
Image Histogram Using a higher subsampling factor speeds up the generation of the histogram but slightly reduces the accuracy of the statistics computed from the histogram. The pixel properties computed by the Image Histogram tool are normalized with respect to the subsampling factor (HistogramPixelCount, ImageHeight, ImagePixelCount and ImageWidth). Therefore, the total number of pixels in the histogram should remain the same at any subsampling factor. Note that there might be slight differences in the values of these properties when either of the width or the height of the region of interest is not a multiple of the subsampling factor used.
Type Long Range ACE Reference Guide, 18317-000 Rev A Page 294