From 22f703cab05b7cd368f4de9e03991b7664dc5022 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 1 Sep 2014 13:56:46 +0200 Subject: Initial import of argyll version 1.5.1-8 --- doc/timage.html | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 doc/timage.html (limited to 'doc/timage.html') diff --git a/doc/timage.html b/doc/timage.html new file mode 100644 index 0000000..2daed27 --- /dev/null +++ b/doc/timage.html @@ -0,0 +1,100 @@ + + + + timage + + + + +

render/timage

+

Summary

+Create TIFF test image, suitable for evaluating various color +transformations. By default a test image consisting of two hexagons and +a grey wedge is produced. The two hexagons are the white and black +corners of the RGB cube surface. This is useful in checking gamut +mapping behaviour applied to an RGB colorspace.
+
+RGB cube surface
+
+ An alternate rectangular "rainbow" representation of the surface +of an RGB +cube can also be created.
+
+RGB rectangular surface
+
+A third type is a set of stepped rectangles that explore the L*a*b* +space, useful for testing profiles B2A tables (-p 6):
+
+Lab steps image
+

Usage Summary

+usage: timage [-options] outfile.tif
+ -v           +Verbose
+ -t           +Generate rectangular boundary test chart
+ -p steps     Generate a colorspace step chart +with L* steps^2
+ -r +res       Resolution +in DPI (default 200)
+ -s           +Smooth blend
+ -x           +16 bit output
+ -g +prop      Percentage towards grey +(default 0%)
+ outfile.tif  Profile +to check against
+

Usage Details and Discussion
+

+The -v flag increases verbosity.  
+
+The default behaviour is to create the two hexagon plus grey wedge test +image. If the -t flag is used, +the alternate single rectangular surface test image  is generated. +If the -p steps parameter is +given, than an L*a*b* test chart is generated.
+
+The dots per inch of the image can be set using the -r parameter. Increasing this, +increases the size and detail of the image.
+
+Normally the images are generated using linear blending of the RGB +values. If the -s flag is +used, a smoother blending is employed. This is most desirable when +generating the rectangular test image.
+
+Normally an 8 bit per color component image is generated. If the -x flag is use, a 16 bit per color +component image will be generated, giving smoother blends, particularly +if a higher resolution (DPI) image is created.
+
+The hexagon and surface test images are normally the surface colors of +the RGB colorspace +cube. If a percentage greater than 0% is given as an argument to the -g option, a test chart composed of +colors away from the RGB cube surface, towards the center grey point +will be generated. 100% will generate a completely grey image. Values +of 10, 20 to 50% are more usual.
+
+The L*a*b* step chart explores the range of L*a*b* values that are +handled by an L*a*b* PCS B2A table, with the L* stepping from 0 to 100 +in steps from the top left to the bottom right square, while the a* +values range from -127 to 127 left to right in each square, and the b* +values range from -127 to 127 bottom to top in each square.
+
+The last argument on the command line is the name of the TIFF file to +save the resulting image to.
+
+
+
+ + -- cgit v1.2.3