#Plumb bob pictures mac

You can check the fields below showing current and resampled image values (pixels and Mb) so you can have an idea of the resampling.

This is to avoid a resampling too exaggerated (up or down), though you can choose any scale in the popup list. My advice is to choose an item that is nearer to the current scale. Now set the new scale from the popup list.As a first step select the unit you have used for your key points coordinates and read the current scale value.This value is read only but it is involved, with the selected unit of measure, in the current scale calculation. Since the rectified image ends up to have a scale different from what you are used to, it is possible to resample it (before saving it!) in order to have a known common scale (such 1:10, for example).Īs you can see, the above panel shows the image resolution (in dot per inches) inherited from the input image. Menu View -> Show / Hide Resample to Scale Panel or push button in the toolbar Said this deserved premise, let's take a look how this new feature works:

#Plumb bob pictures mac

Of course all this it will not happen if the original image has 72dpi resolution, either our Mac will be updated to 10.10 or more. On MacOSX pre 10.10 the resulting scale will be 1: = 1:3,6. Since the program carries out calculations relying on original images resolutions, when these are not at 72dpi, the rectified image, even if resampled, will get (with MacOSX pre 10.10) a scale equal to 72/X times the scale you have set, where X = original dpi and 72 is the dpi of the saved image.įor example, on original image has resolution 200dpi, it is rectified, resampled to 1:10 and saved. The limitation resides in the fact that rectified images are saved, with 10.8 and 10.9, always and only at 72dpi resolution, while with Yosemite or El Capitan, saved rectified images maintain (as it should be) the original image's resolution. The Resample to Scale tool has some limitation when operating in MacOS X previous to 10.10, but to not exclude the many users who are still using 10.8 or al 10.9, I have decided to release Plumb-Bob 2.2 anyway. Giving this values, we can determine, as we will see later, the exact dimensions of the field. Just bring up the resample panel (from the menu View -> Show / Hide Resample to Scale Panel or from the push button in the toolbar) and input units and scale as you wish.įor example, the goal area of a soccer field (as the one shown in the picture above) is, for the laws of the game, 40.3x16.5 meters (or 44x18 yards), while the overall lenght x width may vary (see ). Note that it is possible to resample the resulting image to a more appropriate scale. The resulting image is rendered at the best resolution possible, but it does not take care of the scale. You can choose any decimal unit of measure, no matter which one. Once you get all pins accurately placed, it's time to insert the corrensponding real values.Īctivate the Input Panel and type the known values in the cartesian form (x, y).Īs in a cartesian plane, you should start giving (0, 0) to the lowest left point (better use the red pin first) and, in clockwise order, assign the other points (green, blue, yellow) a value referred to the origin. Now you can move again the magnifier toward the key point, now revealed, and click again the button of the corrensponding color. The pin will be placed exactly where the cross-hair is. In case the exact point is covered by the previously placed pin, move the cross-hair just above then click on the push button of the same color of the pin you are placing. When arriving close to a point to get, use the arrow keys to finely move the glass cross-hair in the exact point. With the magnifier glass activated, adjust the blow-up then click and drag the glass over the image. Placing precisely the pins is fundamental. Take care not to cross the points (watch the four-sides outline that appears when dragging the pins).

Repeat the same with the green, the blue and the yellow ones. As the picture appears, you will see at the lower left corner the four pins you have to place in correnspondance of the 4 key points.īefore to go on reading, you should watch Plumb-Bob at work as showed in the short video (also in HD) here below.Ĭlick and drag the red pin first and place it close to the first known point.