Photo background

[pussyfoot]

I have a photoghraph a building and I want to completely remove the background and leave it just on a white background. Can anyone explain to me if/how I could do this.
Thanks.

[anotheoldgit]

Depending on what photo editing suite you have, select CUT-OUT and EDGE-FINDER. Trace around the outline with the edge finder, click finish you will then be left with the object on a white background ready to save.

[ACtheTROLL]

The easiest (and hardest) way ... is
copy the file (and keep it safe)

open the copy up in windows paint.
increase the magnification to 400% or bigger
with either the pencil or brush ... carefully paint a white line at lease 2 squares deep ALL round the building.

(keep looking at the pikky at 100% to make sure it looks ok)

once you are certain you have completely surrounded the building. use the fill paintpot to remove everything outside the line.
save ... easy .... just time consuming

If you have a better paint proggy ... you can play with slightly blurring the edges which makes things look a little more natural and even removing trees and people.

[dhiman07]

Easily remove the background of an image with photoshop

Background Eraser Tool
Photoshop offers many different techniques to remove an unwanted background from an image. For simple backgrounds, using the standard magic wand tool to select and delete the background may well be more than adequate.

For more complicated backgrounds, you might use the Background Eraser tool. This tool samples the color at the center of the brush and then deletes pixels of a similar color as you “paint.” It feels like painting with acid. Let me show you how it works.

Step 1: Open your Image

Start by grabbing an image that you want to remove the background from. I’ll be using this image as it features areas that range from easy removal through to more challenging spots.

Step 2: Select Background Eraser

Select the Background Eraser tool from the Photoshop toolbox. It may be hidden beneath the Eraser tool. If it is, simply click and hold the Eraser tool to reveal it.

Step 3: Tune Your Tool Settings

On the tool options bar at the top of the screen select a round, hard brush. The most appropriate brush size will vary depending on the image you’re working on. Use the square bracket key ([ or ]) for quickly scaling your brush size.

Next, on the tool options bar, set the Sampling to Continuous, the Limits to Find Edges and a Tolerance of somewhere between 20-25% is a good starting place.

Note: A low tolerance limits your eraser to areas that are very similar to your sampled color. A higher tolerance expands the range of colors your eraser will select.

Step 4: Begin Erasing

Bring your brush over your background and begin to erase. You should see a brush-sized circle with small crosshairs in the center. The crosshairs show the “hotspot” and delete that color wherever it appears inside the brush area. It also performs smart color extraction at the edges of any foreground objects to remove ‘color halos’ that might otherwise be visible if the foreground object is overlayed onto another background.
Note: For the example image, I actually used a rather high Tolerance than the 20-25% recommended above due to the wide range of blues behind this subject.
When erasing, zoom up your work area and try to keep the crosshairs from overlapping on the edge of your foreground. It’s likely that you will need to reduce the size of the brush in some places to ensure that you don’t accidentally erase part of your foreground subject.

Step 5: Choosing Effective Limit and Sampling Settings

Even though I have used a smaller brush to work around the hair and neck area, the Background Eraser has still managed to gouge a few chunks out of the hair and shirt.
For foreground image areas that share colors with the background (like this one), you may need to adjust the Sampling and Limits. In this picture, I switched over to the Sampling: Once option, set my Limits to Discontinguous and set my Tolerance to 30%.
The Sampling: Once option samples the color under the crosshair only the moment you click and it doesn’t resample as you move your brush along. The Discontiguous Limit option allows you to erase all pixels that match the sampled color that you’re erasing. This allowed me to get in between the hair strands without erasing them.
There’s a good chance the Background Removal Tool may be all you need to complete your task.

Step 6: Quick Mask or Pen Tool

While removing the background on our example image is mostly straight-forward due to the fairly solid background, there are inevitably areas of our foreground subject that get wrongly erased as we work close to foreground’s edges.

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