Recently, I just realized that one of the feature StitchSketch has is not listed in the description of the StitchSketch in App store...
It is a function to convert an image file into a chart.
It was added since ver. 1.02, but it seems I forgot to update the application description.
I fixed the description now.
So, here is a step by step how to convert a photo into a chart with StitchSketch.
Notes: To assign color codes from a color chart, you need to use "Full"(paid) version.
1. Choose "Import" from a file menu
You can do this from "Import" menu.
2. Select a chart information
Enter a chart size you want to create, and select the number of colors you want to use (convert).
If "Use Edit Mode" is checked, you can crop the image as a part of the selection process (although iOS force it be "Square")
Use either "Take Photo" or "Choose From Library" (it means Camera Roll) to get an image.
3. Choose an image from a Camera Roll
4. Raw Converted
Once you tap an image, it will be converted and become a chart.
At this point, the number of colors got decreased to the number you specified, and the image got resized to the size you specified.
These colors are just RGB converted, so not yet any color code assigned.
5. Go to the Color List page
See, the "color code" are all blank. In next step, you can assign a color code from a color chart.
It has the number of colors you have specified. In this case, it has 36 colors.
6. Choose "Assign Color Code" menu item
7. Choose options
Select a palette you want to use. ("Full"(paid) version only)
Select a "Target" color items. You can use "All Items" to assign color code to all the items in the list.
You can use "Items with blank or #code" to re-assign only those items.
Select "Merge Duplicate Colors" on, so that when different RGB colors assigned same color code, they would become just one color.
8. New color list after color code assigned
Notice the number of colors now 24 colors down from 32 colors.
This is because some colors are converted to a same thread color, therefore merged into just one color.
9. Converted Chart
This is a chart converted from a photo, and color codes are assigned.
From here, you need to adjust/edit the chart to make it more real chart.
The color conversion is not perfect regarding assigning a color from a color chart. It is because the color chart doesn't include equally distributed colors - It has limited number of color in limited area of colors.
Therefore, after the conversion, you always need to adjust the colors - use your own color chart or actual thread, and re-assign the color code based on your own eye.