Tutorial 8
Tutorial Number 8:
Adjusting The Color in Bitmap Images using CMYK curves, then Resizing and exporting the finished Bitmap. Along the way I will also create the base art for a Drink holder to be printed using The Sublimation Process
Step 1:
I imported the image on the left which a customer has requested on a Neoprene Drink holder. I can see the Image has too much Magenta in it and lacks a little contrast so we need to fix this. The Image is an RGB Image.
Step 2:
From the main menu choose Effects > Raster > Level (with Channel)
Step 3:
I chose the Magenta Channel from the Channel selector. I the set the Gamma Correction to 1.1. I also had Live Preview selected in order to experiment with different setting before I pressed the apply button. You can see the difference between the Image on the left and the one above it.
This filter allows you to correct color in CMYK as well as RGB which is a really useful option. It is much easier to adjust Color in CMYK.
Step 4:
Next I decided to use Inkscapes great built in Contrast Tool: I chose Effects > Raster > Normalize. One click does the job and look at the difference by comparing the two images below. The left being the original, the right being our corrected file. Its so simple an quick
Step 5:
Next I created a Rectangle to the exact dimensions on a Drink Holder (124mm x 214mm ) and Scaled the Image underneath until I had the Rectangle over the Image area I wanted to include in the Drink Holder.
I then
Selected both the Photo Image and the new Rectangle and from the main menu choose Object > Clip > Set
Step 6:
Next I Chose File > Export Bitmap from the main menu. I am now ready to export this file for printing. I used the settings on the left 300dpi high quality file. Inkscape uses the .png file method which creates a relatively small file with very good quality. Refer to the image below showing the file size.
On the left you can see a close up of part of the exported image that is enlarged much more than the final print size. I did this just to show that the quality of the exported Image is of a high enough standard and we did this in a Vector drawing program!
