how do i rotate a pdf 90 degrees

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FAQ

What bookbinding program will take a PDF file that has small pages, rotate images 90 degrees, and print on one side, front and back, and print an identical copy on the other side, 180 degrees rotated, so it can be trimmed into 2 books?
I’m one of the developers of an online PDF converter, DeftPDF and from what I can see, our tool can process your PDF the way you want using three specific tools from our site - for rotation you will use the rotate tool, for bookbinding you use the alternate and mix tool and for you to make two copies per side, you need the N-up tool.Free PDF Software to Edit, Convert, Sign & More.You can start with the rotation tool to ensure that all your pages are right side up or at the degree you prefer, which in your case is 90 degrees on one side and 180 degrees on the other. So make one copy with 90 degrees and make another file with its pages on 180 degrees.Just go to the website and navigate to the rotation tool and upload your PDF document there. After uploading, you will see a preview of your document and the rotation on top. Rotate your pages in bulk or one by one by clicking that button on top.After rotating the pages, download the final file and navigate to the website’s alternate and mix tool. Upload your new file there. Once it's uploaded, click add more files and upload your second file which is rotated in 180 degrees. We're doing this because as you mentioned in your question, you need an identical copy on the back side of the paper.Keep your settings at regular order and switch documents after reading 1 page as seen in the sample screenshot above. Then click mix PDF files at the bottom of the screen and download the processed file. Your pages will look as if page 1 and 2 are the same except its rotated.If you want to manually reorder your combined pages, you can also do so by using the combine and reorder tool instead. You will be given a thumbnail preview of the documents and you can just drag and drop the pages to sort it out. The alternate and mix tool is easier though since it will automatically combine in the order of alternating pages.When you have your mixed files already, go to the third tool which is N-up tool. This will allow you to print two pages per page. Upload your merged file there. You will be given options on how your document will look like.Select 2-up to make two pages per page. Remember, we already merged two files with the second document rotated so the page will look as if the left side is right side up and the right side is upside down.If you want to preserve the page’s original size, just tick the checkbox and select the orientation you prefer - horizontal or vertical. You should try both so you can see which one looks better.Then click N-Up button at the bottom to process your new PDF file. This will be ready for printing the way you described, all you have to do is print and physically bind.
How can I rotate odd pages (1,3,5,7,etc) of a PDF?
In Adobe Acrobat, you can use the Organize Pages panel to easily by simply selecting the “Odd Pages” option and then clicking Rotate.For Adobe Reader users, you can subscribe to Adobe’s PDF Services, which has the same capabilities available as a cloud service.
How do I rotate bulk scanned PDF copies?
I don’t know that this is possible in bulk. I do know my normally reliable Fujitsu scanner will occasionally throw a sideways picture into the mix, and I can easily fix that in Adobe Acrobat. But that has to be on a page-by-page basis. I don’t believe I could process more than one file. There’s an option in my scanner software to ‘automatically orient pages’ (which works with any text in the page) so (in theory) I should never see a wrongly presented page. But they do happen. When this does occur I wind up rotating pages left or right 90 degrees, and occasionally 180 - so individual management is required to get the whole document correctly upright. Sorry not to be more help…:(
How do you know you rotated a shape 90 degrees?
You could measure with a protractor the angle between a point on the object and the corresponding point on the image. Note every point on the image must be the same distance from the point of rotation as the corresponding point on the original object.You might find this video helpful.If and only if you are rotating around the origin then there is a simple trick. The relationship between the co-ordinates of the image (x’, y’) and the co-ordinates of the original object (x,y) can be stated as x’ = -y and y = x. This is only true for a rotation of positive 90 degrees or equivalent angle (e.g. negative 270 degrees).
Why does a mirror reverse things horizontally but not vertically?
Brief AnswerThe mirror has no "bias", rather the meanings of the word left and right are defined relative to the direction a subject if facing. The man in the mirror is facing a different direction from me. The definition of his left and right are inverted therefore. We deployed two frames of reference in our query without noticing they were different. (Bambo)Below I review the sum of other answers, when this question stood at 48 answers.DefinitionsLogical clarificationsThough no one has stated this, the Q presumes we are speaking of a mirror oriented in the coronal plane. (Bambo)There is, in fact, no unequal treatment, as demonstrated by mapping corresponding points in the actual world to the mirror world. All corresponding point pairs are connected by lines orthogonal to the mirror. All these lines are parallel to each other. Unequal treatment would have some lines being non-parallel as they crossed the sagittal plane of symmetry. The mirror does not reverse East and West. (Farough Taee).However, note that a mirror oriented in the sagittal plane does reverse left and right (waves and see which hand moves)! (Tom Slijkerman)Reformulated questionThere is nonetheless the fact that a majority of people believe the paradox presents a genuine dilemma. Why? The man in my mirror does have his part on the opposite side that I do.Frame of reference explanations (correct answer)Unlike absolute directions like "West" or "North," the denotation of directions as "left" or "up" are relative. People and objects facing different directions have different definitions of left and right. In the human case of being sagittally symmetric, as we try to map ourselves into the man in the mirror we rotate ourselves thereby inverting the definitions of left and right. The paradox arises because we describe our left sided hair part from the original frame of reference's definition of left, while we call out the right-handed part of the man in the mirror using the rotated frame of reference. But few of us are conscious of the existence of differing frames of reference. That is the cause of the confusion. (Alex Tamkin). Note that the mirror does not rotate us in space (if it did, his hair part would not be directly opposite my part). The only rotation is our mental rotation of the frame of reference defining left and right, each FoR being intrinsic to its specific object (though shared with other objects facing the same direction). (Tatsuo Tabata).If we write a word on an opaque piece of paper and hold it in front of a mirror, we don't see any text -- until we turn the paper around to face the mirror. So why are left and right reversed? Because we turned the paper around! (Paul King)Geometric explanations (incomplete)We interpret the mirror image as involving a 180 degree rotation of the actual world. (Seb Paquet,) We adopt this fallacy because it involves our attempt (and failure) to stand in the shoes of the man in the mirror. (Joshua Engel). I say failure, because, generally, objects aren't superimposable on their mirror image even after rotations, excepting objects with three-way symmetry. (Alex Tamkin)Optical explanations (true, but not explanatory)Mirrors do discriminate, but not the way the OP asserts. Mirrors invert the Z-axis ordering of things (where X is the horizontal axis in the plane of the mirror, Y is the vertical. and Z is the horizontal orthogonal to the plane of the mirror).  (Paul King) This can also be characterized as reversal of "in" and "out." (Stephen Scholnik)Semantic explanations (incomplete)The key point lies in the nature of the definition of left and right. (Tatsuo Tabata)Symmetry explanations (untrue)You're being fooled by the left-right symmetry of your own body. (Joshua Engel)The cause of the mirror's "bias" is symmetry. Humans are symmetrical only in the sagittal plane (which is orthogonal to the horizontal X axis, which is the more popular, but less precise, characterization of the "confused" dimension). We are confused by how mirrors process symmetry. Regarding asymmetrical relations we do not perceive anything confusing.  (Alex Tamkin)Neurological Explanations (untrue)This results from neurological processes. (Annonymous)Physiological Explanations (untrue)The "problem" arises because we have two eyes, arranged along the X axis. NoteCitations refer to the answer I saw the point made in most prominently. I have no information on the actual temporal priority of the answers.
What are some of the most important problems in computational neuroscience that might drastically affect our perception of the brain and its functioning? Do we have an idea of how to attack such problems?
There are quite a few problems that computational neuroscientists need to solve in order to achieve a true theoretical understanding of biological intelligence.But I'd like to talk about one problem that I think is the holy grail of computational neuroscience and artificial intelligence: the quest for invariance. From a purely scientific and technological perspective I think this is a far more important and interesting problem than anything to do with the "C-word": Consciousness. :)Human (and animal) perception has an extraordinary feature that we still can't fully emulate with artificial devices. Our brains somehow create and/or discover invariances in the world. Let me start with a few examples and then explain what invariance is.Invariance in visionThink about squares. You can recognize a square irrespective of its size, color, and position. You can even recognize a square with reasonable accuracy when viewing it from an oblique angle. This ability is something we take for granted, but we haven't really figured it out yet.Now think about human faces. You can recognize a familiar face in various lighting conditions, and despite changes in facial hair, make-up, age, and context. How does the brain allow you to do things like this?Invariance in hearingThink about a musical tune you know well. You will probably be able to recognize it even if it is slowed down, sped up, hummed, whistled, or even sung wordlessly by someone who is tone-deaf. In some special cases, you can even recognize a piece of music from its rhythmic pattern alone, without any melody. How do you manage to do this?Think about octave equivalence. A sound at a particular frequency sounds like the same note as a sound at double the frequency. In other words, notes an octave apart sound similar. What is happening here?What is invariance?How does your brain discover similarity in the midst of so much dissimilarity? The answer is that the brain somehow creates invariant representations of objects and patterns. Many computational neuroscientists are working on this problem, but there are no unifying theoretical frameworks yet.So what does "invariance" mean? It means "immunity to a possible change". It's related to the formal concept of symmetry. According to mathematics and theoretical physics, an object has symmetry if it looks the same even after a change. A square looks exactly the same if you rotate it by 90 degrees around the center. We say it is invariant (or symmetrical) with respect to a 90 degree rotation.Our neural representations of sensory patterns somehow allow us to discover symmetries and use them for recognition and flexible behavior. And we manage to do this implicitly, without any conscious effort. This type of ability is limited and it varies from person to person, but all people have it to some extent.Back to the examplesWe can redefine our examples using the language of invariance.The way humans represent squares and other shapes is invariant with respect to rotation, as well as with respect to changes in position, lighting, and even viewing angle.The way humans represent faces is invariant with respect to changes in make-up, facial hair, context, and age. (This ability varies from person to person, of course.)The way humans represent musical tunes is invariant with respect to changes in speed, musical key, and timbre.The way humans represent musical notes is invariant with respect to doubling of frequency (which is equivalent to shifting by an octave.)All these invariances are partial and limited in scope, but they are still extremely useful, and far more sophisticated than anything we can do with artificial systems.Invariance of thought patterns?The power of invariance is particularly striking when we enter the domain of abstract ideas -- particularly metaphors and analogies.Consider perceptual metaphors. We can touch a surface and describe it as smooth. But we can also use the word "smooth" to describe sounds. How is it that we can use texture words for things that we do not literally touch?Now consider analogies, which are the more formal cousins of metaphors. Think of analogy questions in tests like the GRE and the SATs. Here's an examplearmy: soldier :: navy : _____The answer is "Sailor".These questions take the form "A:B::C:D", which we normally read as "A is to B as C is to D". The test questions normally ask you to specify what D should be.To make an analogy more explicit, we can re-write it this way: "R(x,y) for all (x,y) = (A,B) or (C,D)". The relation "R" holds for pairs of words (x,y), and in particular, for pairs (A,B) as well as (C,D).In this example, the analogical relationship R can be captured in the phrase "is made up of". An army is made up of soldiers and a navy is made up of sailors. In any analogy, we are able to pick out an abstract relationship between things or concepts.Here's another example discussed in the Wikipedia page on analogy:hand: palm :: foot: _____The answer most people give is "sole". What's interesting about this example is that many people can understand the analogy without necessarily being able to explain the relationship R in words. This is true of various analogies. We can see implicit relationships without necessarily being able to describe them.We can translate metaphors and analogies into the language of invariance.The way humans represent perceptual experiences allows us to create metaphors that are invariant with respect to changes in sensory modality. So we can perceive smoothness in the modalities of touch, hearing and other senses.The way humans represent abstract relationships allows us to find/create analogies that are invariant with respect to the particular things being spoken about. The validity of the analogy R(x,y) is invariant with respect to replacing the pair (x,y) with (A,B) or (C,D).The words "metaphor" and "analogy" are essentially synonyms for the word "invariant" in the domains of percepts and concepts. Science, mathematics and philosophy often involve trying to make explicit our implicit analogies and metaphors.Neuroscience, psychology and cognitive science aim to understand how we form these invariant representations in the first place. In my opinion doing so will revolutionize artificial intelligence.Further reading:I've only scratched the surface of the topic of invariance and symmetry.I talk about symmetry and invariance in this answer too:Mathematics: What are some small but effective theses or ideas in mathematics that you have came across?I talk about the importance of metaphors in this answer:Why are metaphors and allusions used while writing?I was introduced to many of these ideas through a book by physicist Joe Rosen called Symmetry Rules: How Science and Nature Are Founded on Symmetry. It’s closer to a textbook that a popular treatment, but for people interested in the mathematics of symmetry and group theory, and how it relates to science, this is an excellent introduction. Here is a summary of the book: [pdf]Relatively recent techniques such as deep learning have helped artificial systems form invariant representations. This is how facial recognition software used by Google and Facebook work. But these algorithms still don't have the accuracy and generality of human skills, and the way they work, despite being inspired by real neural networks, is sufficiently unlike real neural processes that these algorithms may not shed much light on how human intelligence works.EDIT: Some technical aspects of auditory and visual invariants are discussed in the comments section.EDIT II: I have written an essay on invariance/symmetry that expands on the ideas here: Science: the Quest for Symmetry | 3 Quarks Daily
How do I rotate a cell phone video 90 degrees in Adobe After Effects?
Its simple. Just select your layer, hit R on your keyboard and enter 90 (or -90). You might have to adjust your comp size too. If you don’t know how to get your mobile video in a comp then you should watch basic tutorials by Andrew Kramer of After Effects Tutorials, Plug-ins and Stock Footage for Post Production Professionals first.
How do you rotate text 90 degrees in Microsoft Word?
There are at least a couple ways:Todd Boss, mentions the use of a text box which I’ve included in a sample (See ‘A’ below) … This text box rotated about 45 degrees and could be easily maneuvered the rest of the way to 90.An interesting and useful feature of word tables is the ability to change ‘Text Direction’ within a table cell:I placed a two-cell table in the sample (See ‘B’) and the entered and selected some text (See ‘C’).Right-clicking on the selected text brings up a property menu with the choice [Text Direction…] (See ‘D’)Then a ‘Text Direction’ window is displayed where you can set the desired orientation (See ‘E’).
How do you rotate YouTube videos 90 degrees?
There are lots of software available to rotate videos but I will recommended Wondershare Video Converter out of them because this is very professional video converter and very easy to use for users. It not only rotate video but also can edit video, crop the videos, convert video in different formats or many more other features it provided.So you have to download and install Wondershare Video Converter in your system and then follow these few steps, may be that will help you lots. It supported windows and ios both platform.1. After installation video converter you just add that files that you looking to rotate2.Click on rotate button that needed to rotate3. Save it and convert it.