signature=AcquireStringInfo(image->columns*GetPixelChannels(image)*
sizeof(pixel));
pixels=GetStringInfoDatum(signature);
- image_view=AcquireCacheView(image);
+ image_view=AcquireVirtualCacheView(image,exception);
for (y=0; y < (ssize_t) image->rows; y++)
{
register ssize_t