When reading your image, the format is determined implicitedly typically by the first few bytes of the file. However in some cases, the format cannot be determined. This is true for raw image formats such as RGB, GRAY, or CMYK. Typically you will only need to specify an explicit image format for raw images. Otherwise, do not explicitly choose the image format and it will be determined automatically for you.
These formats behave uniquely
gradient plasma xc
in that the filename is a color or color range. For example, if you select the plasma format, you might define the filename as
Or suppose you want a red canvas that is 512 pixels in width and 480 pixels in height. Set Filename to red, Size to 512x480, and Format to xc.
For the pattern format, choose from these patterns (set the filename to one of these names):
bricks checkerboard circles crosshatch30 crosshatch45 crosshatch fishscales gray0 gray100 gray10 gray15 gray20 gray25 gray30 gray35 gray40 gray45 gray50 gray55 gray5 gray60 gray65 gray70 gray75 gray80 gray85 gray90 gray95 hexagons horizontal horizontalsaw hs_bdiagonal hs_cross hs_diagcross hs_fdiagonal hs_horizontal hs_vertical left30 left45 leftshingle octagons right30 right45 rightshingle smallfishscales verticalbricks verticalleftshingle vertical verticalrightshingle verticalsaw
Two additional formats include a granite texture and the netscape color cube:
You might want to convert your image to a differing image format. Just select the appropriate format from the scroll list on the Output tool page and press output. For a complete list of image formats supported by ImaegMagick Studio see this page.