The Target Generator is a free app I created to make simple grayscale targets for linearization and ink separation images for the custom curve creation tools. ## Grayscale Target Tab Use the horizontal and vertical row sliders to create a patch set for the number steps you want in your image, and then use the duplicate patch slider to create targets with multiple samples per step. The randomize patches button with create a unique set of randomized values used to create the target based on the number of steps used and the number of duplicate patches. The duplicate and randomized patches work bet when measuring with Argyll CMS because these can be decoded in the measurement file from .ti2 reference file that is created along with the tiff. The linearization tools will still detect the duplicate patches and sort the measurements from a CGATS file when measuring with i1 Profiler. (a future update will create i1 Profiler CGATS reference files that include the patch locations and RGB reference values for decoding and averaging randomized and duplicate patches.) The patches in the window are only a preview of the number of rows and columns and not an accurate view of what the final tiff will be (the final image is compliled from raw RGB pixel values when the image is saved) After saving the image (and reference file if needed) you must first open it in photoshop to set the correct pixel per inch ratio. The raw tiff doesn't contain the internal metadata that correct ppi or physical dimenstions, only the raw pixel height and width. - Open the image in Photoshop - Go to Edit->Image Size (Command + Option + i) and deselect resample and change the PPI to 360. - Go to Layer->Flatten - Save and open in Print Tool for linearization **NOTE:** You also **must** define the patch size, borders, and separator widths before trying to save the image (there is a bug that will cause a crash if you try to save the tiff before setting these values that I will fix in a future release) #### Supported Patch Set Sizes You can create a patch set with up to 256 steps, but the best supported sizes when using radnomized and duplicate pathces are targets with 11, 16, 21, 51, 86, 128, or 256 evenly-spaced steps. ### i1 Pro 1 and 2 The defualt patch sizes work fine with i1 Pro versions 1 and 2 (rev D and E), but you must always update the height, width, separator, and margin sliders before saving the image. ### i1 Pro 3 and 3 Plus The latest versions of i1 Pro 3 and 3 Plus require much larget patch sizes than the earlier versions of the device. Sample setup for a 21x4 randomized i1 Pro 3 Target ![[i1 Pro 3 Target Generator Setup.png]] ### ColorMunki Use patch height of 1 inch and width of 0.25 to 0.375 inch and save the ti2 file to measure in ArgyllCMS ![[Target Generator Color Munki Settings.png]] ## Ink Separation Image Tab The Ink Separation is a type of 21-step target with specific RGB values that is unique to QuadToneRIP that determines _which ink_ and _how much_ of that ink to print each color patch in the image. You will notice that each line is a different color, but they all have 21-steps, with a small separator between each path. The R and B values control which ink to print, and the G value controls how much of that ink is printed for each pixel. There has always been a set of standard ink separation images included in QuadToneRIP, but there was never a way to print each row at different ink limits or in different orders without manually editing the standard images or printing each ink row individually with different calibration mode ink limit values. To solve this, I made a simple target generation program to create these 21-step targets for the standard Epson inks in any order and with different total ink loads for each channel. Note: The settings for different ink loads in the separation image are not used in this workflow and are there for other uses not related to my profiling software. ![[Custom Ink Set Target Generator Screenshot.png]] - Open the Target Generator app and choose the ink separation image tab. - List the ink channels and cartridge positions in order from most dense to least dense. In this workflow, you must use an ink limit of 100% for all inks. (You can use the button next to the top ink slider to control the limits for all the channels.) - List any color toning inks below the gray inks and the denser toner ink (of the same color) first if the toner color has multiple dilutions (ex: C, LC, or M, LM). - Save the target as a tiff * **Note for Argyll CMS measurements:** You will need to save the gray ink separation image separately from the color ink separation images so that you can also generate the .ti2 reference files that are used with the Argyll chartread program.