![]() ![]() Do to any calculations on bits and composing resulting image, you can use :īitmap.LockBits Method (System.Drawing). The technical solution for implementation of this general approach is possible with both WPF and System.Drawing and any other non-nonsense API, but I'll prefer to explain it in System.Drawing. Painting with pure black or white produces a distinctly darker or lighter area. Which one to chose? It totally depends on the scenery and chosen goals. It can read, convert and write images in a large variety of formats. It's possible to use many different functions combining the channels. Another approach is to combine just two in some proportions. They know that one of the usual techniques is to take just one of the RGB channels and discard two of them. This fact is well known in artists specializing in gray scale photography. The other tools do need prefacing by 'magick', such as magick identify or magick montage, etc. Note that for IM 7, use magick, not magick convert. magick -density 300 bw.pdf -alpha off -colorspace gray -threshold 50 newbw.pdf. If the purpose is some artwork, it's a matter of artistic criteria which part of information should come with which weight and which part should be taken into account with low weight or even discarded. It works for me on IM 7.0.10.16 Q16 Mac OSX Sierra. Think about it: by converting to gray scale, you destroy part of the information of the image. If you can tolerate jagged edges, index the image to a black and white palette. The problem has big number of different solutions and all of the solution can be considered as equally valuable the difference is only the artistic value of the result. If you think better on this problem, you can understand that the problem is ambiguous. ![]() There is a well-known method of finding gray color from 3 R, G and B components, which is a normalized length of a vector in RGB space.įor example, this is how to do it in WPF: How to: Convert an Image to Greyscale.Īnd, for another example, with System.Drawing: Converting Bitmap to grayscale.īut this is only the half of truth, and, it's well known that the half of truth is lie. All transparent and semi-transparent areas must be pure white or black in color, with the appropriate level of alpha transparency. ![]()
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