Hi Lubomir, Thanks for the quick reply. I understand what you are saying and agree, but in my case I’m not doing the exact same thing as the example. I included the example for clarification. I’m actually manipulating an image and need a working copy with float point precision created inside a generic function. My function looks like the following and I want to remove the gray_layout_t with whatever layout src1 uses. template void function(const SrcView1& src1, const SrcView2& src2, const DstView& dst) { gil_function_requires(); gil_function_requires(); gil_function_requires(); assert(src1.dimensions() == src2.dimensions() && src1.dimensions() == dst.dimensions()); DstView::point_t dimensions = dst.dimensions(); typedef pixel copyPixel; typedef image copyImage; copyImage newImage(src1.dimensions()); } I might be able to use the derived_image_type metafunction, but now I need to figure out how to use this if the input I’m trying to derive from is a view and not an image. Thanks, Mark Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged, company confidential and/or exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If this communication has been transmitted from a U.S. location it may also contain data subject to the International Traffic in Arms Regulations or U.S. Export Administration Regulations and cannot be disseminated, distributed or copied to foreign nationals, residing in the U.S. or abroad, without the prior approval of the U.S. Department of State or appropriate export licensing authority. If you have received this communication in error, please notify the sender by reply e-mail or collect telephone call and delete or destroy all copies of this e-mail message, any physical copies made of this e-mail message and/or any file attachment(s).

Hi All, I was able to accomplish what I needed using the following code. Please provide feedback if you see any potential issues/flaws or a cleaner way to define derived types. void function(const SrcView& src, const DstView& dst) const { typedef typename channel_type< DstView >::type dstChannelType; typedef typename channel_mapping_type< DstView >::type dstChannelMappingType; typedef typename color_space_type< DstView >::type dstColorSpaceType; typedef typename layout< dstColorSpaceType, dstChannelMappingType > dstLayout; typedef typename image_type< dstChannelType, dstLayout >::type dstImageType; typedef typename dstImageType::value_type dstPixelType; typedef typename image_type< bits32f, dstLayout >::type dst32f_image_t; typedef typename dst32f_image_t::value_type dst32f_pixel_t; ... With this I can create images inside this function that are bit32f versions of dst. I wish there was a metafunction that returned the layout of view, so that I could simplify this to 1 or 2 lines of code, but functionally it works. Also, dstPixelType is used with color_convert_view as demonstrated below. I’d appreciate any feedback about more appropriate ways of converting the src to the dst type. color_converted_view< dstPixelType >(src) Thanks, Mark Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged, company confidential and/or exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If this communication has been transmitted from a U.S. location it may also contain data subject to the International Traffic in Arms Regulations or U.S. Export Administration Regulations and cannot be disseminated, distributed or copied to foreign nationals, residing in the U.S. or abroad, without the prior approval of the U.S. Department of State or appropriate export licensing authority. If you have received this communication in error, please notify the sender by reply e-mail or collect telephone call and delete or destroy all copies of this e-mail message, any physical copies made of this e-mail message and/or any file attachment(s).