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Setting up the drawing: resize images using dpi and Overall Size.

Take a look at the image that we will be using for this project (figure 4-1). The first things you will want to do with it are to check its current size and then resize it according to the final output requirements.

[FIGURE 4-1 OMITTED]

Ruler

Control+R turns on the ruler so you can check the actual size of the image.

Right-click in the ruler area to make sure it is set to inches.

Resizing the Image

Go to Image--Image Size and be sure to check Resample Image, which will get rid of pixels and help reduce the file size. The image size is 10.24"x 7.68". Change the width to 10, and the height will adjust proportionately so that the image does not get distorted. Change the resolution to 200, and before hitting OK, check the pixel dimensions at the top of the dialog box which displays the current file size as well as the original file size in parenthesis. You should see the file size drop significantly.

Image Adjustment: Adjusting Brightness, Contrast, Color, or Value

This picture was taken on an overcast day, while many of the source images were taken on sunny days. To adjust the base image so it looks more consistent with the other images, go to Image--Adjustments--Levels and slide the right-hand slider to the left until the input level on the right reads 200 (figure 4-5).

[FIGURE 4-5 OMITTED]

You can use this for any pictures in the future that need a slight natural adjustment in color. Other common options for image adjustments are under Image--Adjustments:

The Auto options for levels and color adjust the image by reading pixel information.

Color Balance allows you to adjust several color issues manually.

Brightness/Contrast allows you to adjust brightness and/or contrast manually.

Hue/Saturation allows you to adjust the hue and/or saturation manually.

These commands will give you a preview, so try them all on the base image. Just make sure to hit Cancel or go back in the History States to the adjustment level set earlier.

Getting Started

Students are often discouraged with an image of a site in disrepair but to save time and to avoid putting in unnecessary objects, we suggest you go ahead and start designing the site. If there is some clean up work to be done, do it later.

By Professor Ashley Calabria

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Title Annotation:CHAPTER 4: Photoshop Imaging
Author:Calabria, Ashley
Publication:Computer Graphics for Landscape Architects, An Introduction
Geographic Code:1USA
Date:Jan 1, 2009
Words:398
Previous Article:Acquiring pictures or image retrieval.
Next Article:Selecting out materials and moving to the base image.
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