4 Replies Latest reply on Jul 19, 2009 8:48 PM by pixlor

# Sliceing a photo and then rotating it.Maybe with feather.

I have an image 2.5 in wide and 3.5 in high (300 dpi).

I want to convert this image into a playing card as in a face card.

The image is a drawing of a king head to toe.

I want to slice the photo in a diagonal. A diagonal that passes through the exact center of the image.

I want to throw away the bottom part of the image. I want to copy and rotate 180 degrees the top half to replace the bottom halk i just discared.

In the end i want the image to be like the king of hearts in a deck of cards.

Also the line the cuts the original image may be straight accross or at a diagonal. It may also be a symetrical curve that fits into itself after the copy and rotate.

I cant seem to get past the cut part.

I have tried polygon lassoo but cant garentee that it passes the exact center.

I would like to draw a freehand irregular cut and end it on the exact center, then flip the line so that the rest of the line mirors the first halh in such a way as to fit exactly after the cut and rotate.

I hope i am clear on my question.

Thank you up front.

Jerry C

• ###### 2. Re: Sliceing a photo and then rotating it.Maybe with feather.

Images are not in inches. Images are in pixels. The dpi only matters when you print, as that will determine the scale for printing. The data is determined by the pixel dimensions and color information. Your image is 750x1050 pixels.

Anyway...try this...

Increase the canvas size so you have room to work.

Draw a white rectangle 1.5 times the size as your image.

You'll need to rotate the white rectangle so that the edge lines up with the diagonal of your image.

Er...this is trigonometry. The tangent is the "opposite" over the "adjacent" (sides, that is). Taking the arctangent of (1050/750), we get 54.46 degrees. Depending on which way you want to slice your image, rotate the rectangle by that or by 90-54.46=35.54.

Move the white rectangle  to cover the half of the image you want to keep.

Select the white rectangle and the image. Use Modify > Mask > Group as Mask.

Select the masked, triangular object, copy and paste it. Take the copy and flip it both horizontally and vertically.

1 person found this helpful
• ###### 3. Re: Sliceing a photo and then rotating it.Maybe with feather.

Awesome math and nice precision in this technique!  Nice work!

• ###### 4. Re: Sliceing a photo and then rotating it.Maybe with feather.

Thanks!