debug( x ): print x (useful for debugging your expression).channel( c, m, y, k, a ): select numeric argument based on current channel.channel( r, g, b, a ): select numeric argument based on current channel.ceil( x ): smallest integral value not less than argument.atan2( y, x ): arc tangent function of two variables.alt( x ): sign alternation function (return 1.0 if int( x ) is even, -1.0 if int( x ) is odd).airy( x ): Airy function (max=1, min=0) airy( x )= 2= 2.

s, t, u, v, n, i, j, w, h, z, r, g, b, a, o, c, y, m, k: symbols.rgb(), rgba(), cmyk(), cmyka(), hsl(), hsla(): color functions.#ccc, #cbfed0, #b9e1cc00, etc.: color hex values.luminance: pixel luminance equivalent to 0.2126*red + 0.7152*green + 0.0722*blue.lightness: pixel lightness equivalent to 0.5*max(red,green,blue) + 0.5*min(red,green,blue).intensity: pixel intensity equivalent to 0.299*red+0.587*green+0.114*blue.QuantumScale: constant 1.0/ QuantumRange.QuantumRange: constant maximum pixel value (255 for Q8, 65535 for Q16).x = y: assignment assignment variables are restricted to letter combinations only (e.g.x ? y : z: ternary conditional expression, return value y if x != 0, otherwise z only one ternary conditional permitted per statement.~ x: logical NOT operator, return value 1.0 if not x > 0, otherwise 0.0.x || y: logical OR connective (inclusive), return value 1.0 if x > 0 or y > 0 (or both), otherwise 0.0.x & y: logical AND connective, return value 1.0 if x > 0 and y > 0, otherwise 0.0.x != y: boolean relation, return value 1.0 if x != y, otherwise 0.0.x = y: boolean relation, return value 1.0 if x = y, otherwise 0.0.x >= y: boolean relation, return value 1.0 if x >= y, otherwise 0.0.x y: boolean relation, return value 1.0 if x > y, otherwise 0.0.x * y: multiplication (the asterisk * is optional, for example, 2u or 2(x+y) are acceptable).depth.r)Īn Fx expression may include any combination of the following: (add a channel specifier to compute a statistic for that channel, e.g. Standard_deviation = image standard deviation R = red value (from RGBA), of a specific or current pixel P = pixel to use (absolute or relative to current pixel) T = scene number of current image in sequence color functions: rgb(), rgba(), cmyk(), cmyka(), hsl(), hsla() color hex values: #ccc, #cbfed0, #b9e1cc00 symbols: Sign(), sin(), sinc(), sinh(), sqrt(), tan(), tanh(), trunc() channel functions: channel(r,g,b,a), channel(c,m,y,k,a) color names: red, cyan, black, etc. ~ (logical NOT), ?: (ternary conditional) math functions: abs(), acos(), airy(), alt(), asin(), atan(), atan2(), ceil(), cos(), cosh(), debug(), exp(), floor(), 3.81469e-06) constants: e, Epsilon, QuantumRange, QuantumScale, Opaque, Pi, Transparent Fx operators (in order of precedence): ^ (power), *, /, % (modulo), +, -, The formal Fx expression language is defined here: numbers: integer, floating point, or scientfic notation (+/- required, e.g. The next section discusses the Fx expression language. See Using FX, The Special Effects Image Operator for more examples. For example, lets create a radial gradient: Assignments, in most cases, reduce the complexity of an expression and permit some operations that might not be possible any other way. The expression can include variable assignments. This expression results in a high contrast version of the image: Here, we convert a black to a navy blue image: $magick> convert -size 64圆4 xc:black -channel blue -fx '1/2' fx_navy.png generate image metrics or 'fingerprints'.convolve or merge neighboring pixels together.merge or composite multiple images together.translate, flip, mirror, rotate, scale, shear and generally distort images.move color values between images and channels.create canvases, gradients, mathematical colormaps.Use the Fx special effects image operator to apply a mathematical expression to an image or image channels.

64x64 image converter