Simpleitk rgb to grayscale

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{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "#Welcome to your first SimpleITK iPython Notebook: ", "##This will teach you basically how to ... When I view it in any desktop GIS it has proper RGB colors, but when I use the vrt in Mapnik to render some tiles, I get grayscale images as a result. Why? Update: If I convert the Erdas Imagine files into png-s (I need transparency where there is no data) Mapnik render works ok, so I guess it's something to do with how Mapnik interprets Erdas ...

I want to initialize a constant struct with using a function at compile time. All the inputs for this function are constants so it should theoretically be possible. but some const values used by the function are seemingly not yet initialized by the compiler, leading to an incorrect value. I will use radius and surface. I have a library of pictures of each coin. On the left, you can see what type of pictures I have to process. On labview 2009, I use the IMAQ Module to do this operation. I give you my Vi. The problem is that i can't operate on RGB picture. first I have to convert it to grayscale then binary.

{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "#Welcome to your first SimpleITK iPython Notebook: ", "##This will teach you basically how to ... How to convert RGB to grayscale. Gray RGB color code has equal red,green and blue values: R = G = B. For each image pixel with red, green and blue values of (R,G,B): R' = G' = B' = (R+G+B) / 3 = 0.333R + 0.333G + 0.333B. This formula can be changed with different weights for each R/G/B value. SimpleITK Filters ¶ Filter Name Brief Description ... Grayscale dilation of an image. ... Implements pixel-wise intensity->rgb mapping operation on one image. When I view it in any desktop GIS it has proper RGB colors, but when I use the vrt in Mapnik to render some tiles, I get grayscale images as a result. Why? Update: If I convert the Erdas Imagine files into png-s (I need transparency where there is no data) Mapnik render works ok, so I guess it's something to do with how Mapnik interprets Erdas ...