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# 2.5 Conversion

See figure 2.6.

These functions may be split into three broad groups: functions which convert between the VIPS numeric formats (`im_clip2fmt()`, for example, converts an image of any type to the specified `IM_BANDFMT`), functions supporting complex arithmetic (`im_c2amph()`, for example, converts a complex image from rectangular to polar co ordinates) and functions which perform some simple geometric conversion (`im_extract()` forms a sub-image).

`gbandjoin` and the C function `im_gbandjoin()` will do a bandwise join of many images at the same time. See the manual pages.

Figure 2.6: Conversion functions

Figure 2.7: Conversion functions (cont.)