What is the easiest way to zoom into a picture?

Once I generated a picture, what is the easiest way to zoom into it?
I.e. Mantaining the same picture size on the screen, but reducing the
field of view on a certain section, in order to make it bigger?
Thanks.
G.

If you are using the picture control in version 6.0 you are out of luck, if I remember correctly, the zoom property was add in version 7.0 ( I could be wrong) . The math is simple on zooming a picture however consisting of a translation and scaling factor only. Lets assume we have a picture in a 600x800 (height pixels by height pixels) to zoom in to the center we use the center pixel (600/2, 800/2) and make the array subset of the zoomed image from center - (height/2)/zoom_factor and a zoomed height of height/zoom_factor and do the same for width. So basically you find the center pixel (need not be the center of the image) and get a subset of the initial image array data with a new height and width both divided by the zoom factor.
Paul
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

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What is the easiest way to zoom into a picture?

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