Taking pictures of landscapes of gives results where the horizon is at an angle because the camera has not been held horizontal. The picture typically has to be corrected afterwards in a photo editor.
Brainstorm
Take photos with true Horizontals
Posted on 2009-09-25 22:32 UTC by mike choy. Status: Under consideration, Categories: Media.
Solutions for this brainstorm
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Solution #1: Use grid and Accelerometers for guide
Posted on 2009-09-25 22:41 UTC by mike choy.
Put a grid on the viewfinder, and present a horizontal line that reacts to the accelerometer. effectively using the accelerometer as a spirit level. By lining up the grid and the accelerometer line an true horizontal picture can be taken.
If the N900 has a straighten function in its photo editor, the accelerometer could be used to level the picture by holding the n900 vertical, press screen to float image. image stays horizontal while you can rotate the n900. when it is straightened, press screen to lock the image. Presto you image is straightened.
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Solution #2: Overlay Jaffa's 'Attitude' application on top of the Camera App
Posted on 2009-10-15 02:13 UTC by Sanjeev Visvanatha.
Jaffa has created an artificial horizon application called 'Attitude' for Maemo 5. It currently displays the N900's roll angle, and gives a graphical representation of the pitch. If this application was overlayed on top of the camera application, then you could indicate via colour-coded border if the roll angle was within a prescribed limit. In addition, similar approach could be used for the pitch angle. The EXIF for the capture image could include both the roll and pitch angle for further use in image processing software. While the colour-coded border(s) would give the user an indication that he/she is 'close enough' in terms of true horizontal and pitch angle; the information recorded within the EXIF could be further used in image processing software to rotate the image to true horizontal and to remove any keystoning effects.
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Solution #3: Post-processing...
Posted on 2009-10-22 03:08 UTC by Tim Samoff.
Allow a finer grain of rotation when editing the photo in the Photos app (e.g., grabbing the upper-left) corner of the crop tool could be fine-rotation -- and even temporarily overlay a grid while rotating).
I know this isn't a real "solution" to this issue, but it would solve it in a different way.
