Photoshop :: Area Of A Selection?
Feb 14, 2004
I was wondering if anyone knew a way of determining how many pixels are selected (like with the freehand selection tool).
My problem is this: I have a map and I'm trying to determine the area of different countries on the map. The best I've been able to do so far is to draw a rectangular box around the countries and look at the width and height of the box and use the scale (so many pixels == so many miles) to figure the area. But some of the countries are quite irregular in shape and I'm just wondering if there's a better (more precise) way. I'd love it if I could just freehand select a country and then click a button to see how many pixels it is.
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Oct 31, 2011
i wish to define a selection, which can be altered while preserving it's area.
for instance, assuming the selection is 6x4 (an area of 24), then any of the following selection box holds: 1x24, 2x12, 3x8, 4x6, 8x3, 12x2, 24x1.
is there any way to achieve it?
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Nov 7, 2006
How can i select areas of an image and find their size in pixels?
using the measure tool or image size only works for square (straight sided images).
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Sep 21, 2008
How can I keep my selection area on the background image or layer after doing a create new layer via copy?
I am trying to make a selection and an inverse of the selection and put each on a seperate layer to do adjustments seperatly without having to go back and reselect the desired area. It seems to disappear after the new layer is created.
Is there a better way to accomplish this, what am I missing?
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Sep 18, 2013
Recently started experiencing a problem in PSE11. When I select an area of an image using the rectangle or lasso tool, the area I've selected immediately fades to black. Modifying the selection area makes it visible again for just a moment, then it fades out again. I know that the underlying image is not affected, as I can apply edits (filters, etc.), and the image returns to normal when I deselect. However, this is making image editing difficult. I'm on a MacBook Pro, running Snow Leopard (10.6.8). I also use Lightroom 4, and have PSE set as the external editor.
I uninstalled and reinstalled PSE, which worked for a while, but the problem has returned.
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Oct 10, 2008
I want to select an area of video and use a filter on it but maintain that filter all through the video. Currently when I try to use a selection and a filter (blur filter) it will only let me effect one frame at a time. The one frame is under the affected video area. How do I extend that one selection and frame all through the video clip?
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Nov 15, 2012
I use Photoshop to design interfaces and then cut down the graphics, by using the rectangular marquee tool and selecting the area that I want to save, copy-merged and then paste into a new document, of the correct canvas size according to the selection area, and then save for web..I end up with dozens of open windows all "Untitled" something, unsaved.
All I want is being able to select an area in my document using the marquee tool and then select from File a save function like "Save selection for web and devices...".
Perhapse this option could be in the "Save for web and devices.." dialog, where you could select from a dropdown the following:
"Entire document" (default)
"The entire selected area"
"Trimmed down selected area"
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Oct 18, 2012
How do I select an area, and then use it as a paintbrush?
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Nov 6, 2012
When I use the Fuzzy select tool or the select by colour tool, how can I remove the selection area around the parts that I don't want selected. For example. I have red car on a white background which I want to cut and paste to a black background. I select the white background, but although it selects all the white, it also selects other small areas on the car which are a similar colour. If the threshold is lowered too much when I use these select tools then I get a very small white border around the object when I paste it on to a dark surface. So instead of selecting using the default (15) or even less, I have to ramp it up so as the selection is closer to object and does not show the white jagged line. I thought that I could use the other selection tools with the "remove from selected" option selected, but each time I place a rectangle around the selected area that I want ot deselect, it does away with the entire selection area. I just cannot get it sussed.
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Nov 29, 2011
While I'm in the "selection" mode - and it doesn't matter whether I'm preselecting objects or selecting them under some command - I pick the starting point of selection window and then I pan to another side of the drawing and there I pick the point to close the selection window.
Result: all the objects that I left behind while panning to the other side of the drawing, go out of the selection, so only those objects in the final viewing area stay selected - and it's not what I want... I want to keep all the objects under selection - including the ones that were panned out from the viewing area... I hope you understand what I'm trying to describe here....
I'm quite sure that this worked fine in previous versions, so I'm also pretty sure that there must be an option or parameter that controls my issue - I just can't seem to fint it...
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Apr 30, 2013
How do I combine a fuzzy selection area with a dodge or burn operation?
The fuzzy select tool is handy for roughly outlining areas of over or under exposure. There must be a way to combine an oddly-shaped fuzzy selection area with a jittery dodging operation. Do I have to turn the fuzzy selection area into a "brush" somehow, in order to "dodge or burn" that area?
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Jul 4, 2013
When using the LR5 spot removal tool I can perform cloning or healing and LR automatically selects the target used to clone from, but I cannot see where this area is on the image. A pin should appear with a line connecting the area to be removed and the target area used to clone from. I see no pin. Is this controled by a setting?
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Dec 13, 2012
How to make the Getfiled dialog box taller to include more of the file selection area? Where to change number of lines displayed. The code is not in the Acad.dcl
Like the Acad.dcl one can edit the width of edit text window: See edit_width = 80;
acad_txtedit : dialog {
label = "Edit Text";
initial_focus = "text_edit";
[Code]....
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Nov 27, 2013
The problem is that if one has defined a selected area in an image, using either selection by color or contiguous selection using the 'magic wand' facility, is possible to copy this selection to the Image Map facility of the image, so as to automatically define a set of coordinates as a polygon that can be used for link purposes? Perhaps there is some interim step that is required, or perhaps a special script is required?
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Mar 22, 2012
I want to select part of an image with just one layer. Say I just flattened the image and have to move one part of. I select it with the rectangular select tool. It seems intuitive that I could then just move what I selected, but when I drag the selection, the selection itself moves without moving what is inside the selection.
If I then remember to click the move tool and try to move what's in the selection (seems to work sometimes, maybe when there's multiple layers?) the entire image moves.
The only way I can move part of the image over is if I make a selection and then cut it (ctrl X) then paste it.
How am I supposed to move part of the flattened image, is there a way I can set it to default to "When I select something, I can immediately drag that selected area around."
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Apr 6, 2009
I've recently migrated from AutoCAD 2008 (non-industry specific) to AutoCAD 2010 so I don't know if this was an issue in 2009.
Back in 2008, when I choose the 'window' option when specifying a plot area, AutoCAD would show the workspace so that I could manually select a windowed plot area, and at the same time the whole workspace would be greyed out except the previously active window area.
This was handy, because we can have as many two dozen title-blocks (and therefore separate viewports) in paperspace, and knowing what plot area I last plotted or added as a saved page setup.
In 2010, it no longer does that. I now have to rely on the dashed border to know where the active plot area is/was (checked 'display printable area' in options>display tab) which I personally don't really like using.
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Oct 23, 2012
How to changes the settings for the "Square Area" in mapcheck's closure summary. When I right-click the dwg name in the Settings tab of Toolspace and choose Edit Drawing Settings, then Ambient Settings, I see the Area settings, but in the closure summary, there is also "Square Area". Why are these both there? It WOULD be nice to show sq. ft. as well as acres, but I can't find anywhere to edit it.
Civil 3D 2012
Windows 7 Enterprise SP1
Dell Precision T3400
(Q9550 @ 2.83 GHz)
8GB RAM
Nvidia Quadro GTX 650 Ti BOOST
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Sep 19, 2011
Photo editing. How do I select an area within a .jpeg image so I can blur that selected area?
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Oct 12, 2011
I want to know if there is an easier ACAD solution for drawing. In the given triangle of ABC (sides and angels are known) I want to draw line CM so that the area of BCM becomes 2000 cm (are of ABC is 5311.7 cm3).
Is there an easy ACAD way for drawing this line without using trigonometry for calculation?
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Sep 19, 2012
See attached file.
How can you do the area takeoff of only the selected faces (red area)?
Right now I have to use the 3rd party software to do something like this. I'm curious if there's a way to do inside Revit?
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Apr 14, 2013
I need to determine whether an area intersects with another area.The left case can be easily determined by Polyline.IntersectWith(Polyline...).But in the right case, the two polygons intersect/overlap each other while polylines do not intersect.
What would be the efficient way to determine the right case polygons are intersecting polygons?
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Sep 9, 2013
After selecting the area type tool, I try to click and drag but I get an error message: You must click on a non-compound, non-masking path to create text inside a path. This worked before but I must have screwed something up.
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Sep 1, 2013
I have been continually annoyed, when creating a vector mask-heavy document, with trying to select vector mask points by dragging a rectangle only to find that it instead selects a layer higher up which has a larger vector mask.
The only workaround is to manually select the points of my mask or to drag a rectangle from outside the canvas, meaning I have to zoom out or scroll to the edge - sometimes annoying if I am zoomed in quite far.
I know that the move tool can be set to automatically select a layer, depending on what part of the image is clicked, but why is there not an option to turn this off for vector editing?
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Dec 10, 2012
If you look closely in the attached picture, there is a spot of light blue on the player's helmet, that looks like a mistake (think it should look like the grass behind it)...though it actually may be part of his helmet.
Regardless, I'd like to take it out. My idea was to select the blue with the quick selection tool, then bring that selection out to the grass, select the grass with that size/shape of selection, copy/paste and then bring the grass selection into the blue part so it looks like grass in what was the blue part.
The problem is I don't seem to be able to move the selection without taking the blue with it (so it's not an empty selection and therefore can't select a piece of the grass.)
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Sep 13, 2012
I have Photoshop CS5 on a Mac OS 10.7.4 My problem is that when I am using curves or a slider, my selection does not stay in the same place. For example, I chose the number 8 on a slider, after I release my selection it will either go one number after or before my selected number. I have had this problem since I got my computer, December 2011, but it has only recently started to frustrated me because of having to use Photoshop a little more than I usually do.
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Oct 24, 2011
how to "drop out" the background from this photo (I have loads to do which are very similar). Thus far I have tried channel selections and the calculations tool + all the normal quick selection tools and I just cant get it to work without spending hours adjusting things. The end effect I need to achieve is a perfect white background without loosing any of the detail if possible. On a side note I have also tried taking the photo on blue, green, black and white backgrounds but due to the number of colours present in the products its just not working for me.
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Sep 1, 2006
Using photoshop, how do you make a selection out of a text and expand the selection?
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Jul 6, 2009
I am trying to cut a person out of a picture with a deatiled background so I am using the quickmask selection and paint brush. I'm done selecting the person and have gone back into normal editing mode. I then inversed the selection created within quickmask to select everything but the person in the background. When I click delete, the background vanishes and the person become opaque.
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Dec 26, 2003
If I have mad a selection with say an ellipse marque, of say 100px and now I want to fether that same selection outwards, ie to start the feather 10 px outward of the 100px selection so that the 100th px has a 100% transparency and the 110th px has a transparency of zero,thus making the new selection 110px, how could I go about doing it. With the current feathering of the selection, it feathers only in the marquee already selected, not outward, and you cannot place negative feathering px. I know that there is most likely some sort of a ration where you would expand the selection by a certain amount of px, and then apply a ratio of feathering to it to enalble it to feather outside of the 100px marquee.
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Aug 18, 2012
When I pasted a selection made with the Marquee tool there is a transform grid around the pasted selection. I use a MAC and Photoshop CS6 and would like to deactive a feature for this automatic grid, if there is one.
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Jul 12, 2011
When I select a hatch or polyline or any object with grips for that matter, and hold down shift to select multiple grips on the object or objects and then press my middle mouse button to pan or scroll it to zoom, the grips that I have selected de-select, meaning I have to set up the view so that all the grips I want to move are visible before selecting them.
This is only happening on some drawings (although it is most of them) and only when I use 2012 not 2011. Which system variable it is that has gone screwy that I need to reset? or is it something else?
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