[Vxl-maintainers] 3 patches for vil (in_range, max/min, fill)

[Nicolas B. <nic...@en...>]

Hi,

While using vil, I've run into the following flaws :

1) vil_image_view::fill(T value) is suboptimal.
Using vcl_memset when the memory is contiguous can signicantly improve the 
performances of this function. It can be applied very easily when 
sizeof(T)==1. The attached vil_fill.patch file tries to select the best 
implementation when the image_view is contiguous. It requires template struct 
within template struct support (to avoid partial specialization), I don't 
know is this is problematic for some compilers vxl supports.

2) I could not find any equivalent to vil1_image::in_range with vil, so I 
added an in_range member to vil_image_view. This is in_range.patch.

3) I could not find any vil_math_image_max/min function, the compute the max 
or the min between two images. Neither I could find a generic apply function, 
taking 2 images, a binary functor, and an output image. I think I will write 
one if nobody's is against it. For the moment, vil_image_math_maxmin.patch 
adds vil_math_image_max and min functions.

I'm new to vxl and its philosophy, please let me know if I'm not respecting 
the spirit nor the constraints of vxl.

Thanks,

-- 
Nicolas Burrus