This document provides instructions for converting a color photo to a black and white sketch effect in Photoshop. It involves desaturating the image, making copies and inverting layers, changing blend modes to Color Dodge, and adding Gaussian blur and levels adjustments to create the sketch effect. The process results in an image that appears white filled with some black areas depending on the original photo, achieving the sketch effect.

1. Submitted by:
Ahmad Mamand
Odette shalim
Dlven nader
University of Duhok
Faculty Of Science
Computer Department

2.  With the photo newly opened in Photoshop,
we see in the Layers panel that the image is
sitting on the Background layer:

3.  Go up to the Layer menu in the Menu Bar
along the top of the screen, choose New,
 choose Layer via Copy. Or, for a faster way to
run the same command, press Ctrl+J (Win) on
your keyboard:

4.  Go up to the Image menu at the top of the
screen, choose Adjustments, then choose
 Desaturate:

5.  The controls and options for the
Hue/Saturation adjustment layer appear in
the Properties panel. To remove the color
from the image, simply drag
the Saturation slider all the way to the left to
a value of -100:

6.  This removes all color from the photo,
leaving it in black and white

7.  Next, we need to make a copy of our
desaturated image. Go back up to the Layer
menu,
 choose New, then choose Layer via Copy, or
press Ctrl+J (Win) on your keyboard, just as
we did in Step 1. Photoshop makes a copy of
Layer 1, names
 it “Layer 1 copy”, and places it directly above
Layer 1 in the Layers panel:

9.  In the upper left of the Layers panel, change
the blend mode of the Background copy layer
from Normal (the default blend mode)
to Color Dodge:

10.  This inverts the image, giving it a film
negative appearance:

11.  Next, we need to invert the layer. Go up to
the Image menu at the top of the screen,
choose Adjustments, then choose Invert. Or,
press Ctrl+I (Win) on your keyboard for the
shortcut:

12.  The document will temporarily appear filled with white.
Depending on your image, there may be
 some areas of black here and there, but for the most part
it will be filled with white:
 After changing the blend mode to Color
 Dodge, the document appears white.

13.  This next step is where we actually create the
sketch effect. Go up to the Filter menu at the top
of the screen, choose Blur, then choose Gaussian
Blur:

14.  Click OK when you're done to accept your
setting and close out of the Gaussian Blur
dialog box.

15.  Now add a levals Adjustment layer by going
to (image > Adjustment> levels).