The operator is not typically used for real-life images, image scans, or Mimimum and maximum color values in the image and then applies a -level operator to stretch the values to the full range of This is a 'perfect' image normalization operator. auto-level Automagically adjust color levels of image. " -alpha Off", the -matte operation is the same as " -alpha Note that while the +matte operation is the same as PNG, smaller as the RGB values of transparent pixels are more uniform, This can make some image file formats, such as Set any fully-transparent pixel to the background color, while leaving The color channels are not modified.Īs per ' Copy' but also colors the resulting shape mask with Gray-scale intensity of the image, into the alpha channel, convertingĪ gray-scale mask into a transparent shaped mask ready to be coloredĪppropriately. Turns ' On' the alpha/matte channel, then copies the ' Off' the the image's transparency, so as to generateĪ gray-scale mask of the image's shape. Same size as the original and with all its original RGB data stillĬopies the alpha channel values into all the color channels and turns This effectively creates a fully transparent image the The alpha channel turned on, it will have no effect.Įnables the alpha/matte channel and forces it to be fully opaque.Īctivates the alpha/matte channel and forces it to be fully Then it also resets the channel to opaque. Does not delete or change theĮxisting data, just turns off the use of that data.Īctivates the alpha/matte channel. Preserve existing (but specifically turned Off) transparencyĭisables the image's transparency channel. Should be used instead of this, unless you specifically need to typeĮnable the image's transparency channel. Choose the argument type from the list below. Used to set a flag on an image indicating whether or not to use existing alphaĬhannel data, to create an alpha channel, or to perform other operations on the alpha channel. alpha type Gives control of the alpha/matte channel of an image. If the matrix determinant has a sufficiently small absolute value it is rejected. The cumulative effect of a sequence of -affine transformations can be accomplished by instead by a single -affine operation using the matrix equal to the product of the matrices of the individual transformations.Īn attempt is made to detect near-singular transformation matrices. Rotate clockwise about the origin (the upper left-hand corner) by an angle a by lettingĬ = cos( a), s = sin( a), and using the following. Translation by a displacement ( t x, t y) is accomplished like so: Scaling by the factors s x and s y in the x and y directions, respectively, is accomplished with the following. Therefore, four parameters suffice for rotation and scaling without translation. If the translation coefficients t x and t y are omotted they default to 0,0. The transformation matrix complies with the left-handed pixel coordinate system: positive x and y directions are rightward and downward, resp. The parameters t x and t y subsequently shift the image pixels so that those that are moved out of the image area are cut off. The size of the resulting image is that of the smallest rectangle that contains the transformed source image. (2) the +adjoin option is given, or (3) a C-style integer format string is
Multiple files if either (1) the output image's file format does not allow multi-image files, In summary, ImageMagick tries to write all images to one file, but will use Will create a sequence of 17 images named my00morph.jpg, my01morph.jpg, my02morph.jpg. $magick> convert logo: rose: -morph 15 my%02dmorph.jpg These strings, such as ' %d' or ' %03d', are familiar to those who have used the standard printf()' C-library function. Including a C-style integer format string in the output filename will automagically enable +adjoin and are used to specify where the -scene number is placed in the filenames. Per file (for example, GIF, MIFF, and TIFF). To separate files, whether or not the file format allows multiple images Use +adjoin to force each image to be written Suffix, in order to make distinct names for each image. Modified by adding a -scene number before the Such, if more than one image needs to be written, the filename given is Image per file, and in that case ImageMagick is forced to write each image as a separate file. However, some formats, such as JPEG and PNG, do not support more than one Images of an image sequence into the given output file. adjoin Join images into a single multi-image file. Otherwise noted, each option is recognized by the commands convert, mogrify. Option name in the navigation bar above and you will go right to it. If you want a description of a particular option, click on the Below is list of command-line options recognized by the ImageMagick command-line
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