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Author | Topic: Quick Questions, Short Answers - No Debate | |||||||||||||||||||||||||||||||||||||||
Panda Member (Idle past 4035 days) Posts: 2688 From: UK Joined: |
IfranView has batch processing.
http://www.irfanview.com/ Instructions:
http://gd.tuwien.ac.at/graphics/irfantut/batchcon.html Always remember: QUIDQUID LATINE DICTUM SIT ALTUM VIDITUR Science flies you into space; religion flies you into buildings.
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Taz Member (Idle past 3614 days) Posts: 5069 From: Zerus Joined: |
Wow, I love you!
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RAZD Member (Idle past 1728 days) Posts: 20714 From: the other end of the sidewalk Joined: |
Hi Dr Adequate,
... I've never found any way to get internet access again except to restart my computer. There must be a better way, does anyone know of one? Is this with wifi card in the computer or a hard wired modem connection? Is the wifi from your modem connection? Sometimes you just need to reboot the modem (I've had this problem with both cable and DSL wifi modems). First left click the icon to see if that tells you the problem - has it lost ALL connections? Second try "repair" as was suggested for windoze, or see if you can run a diagnostic. The ipconfig was a common problem I had using available wifi systems and worked somethimes. It doesn't work for me with my MIFI air card -- I get a strong signal from the card but the card can be disconnected from the cell service (jez like a phone and I then need to turn the card off and then back on and then re-initiate the connection). Third try just signing off and back on rather than rebooting. Or get an Ipad . . . . Enjoyby our ability to understand Rebel American Zen Deist ... to learn ... to think ... to live ... to laugh ... to share. Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)
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Taz Member (Idle past 3614 days) Posts: 5069 From: Zerus Joined: |
Panda, what if I want to use irfanview to change a picture so that if it's slightly white than it turns into completely white and if it's black then it turns into completely black? I painstakingly took pictures of an entire book and now I'm trying to convert it into pdf. How would I go about doing this? I don't expect to have pdf words in the text. But at least if the pages can be completely white rather than slightly tan then I can save a lot of space in the file.
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crashfrog Member (Idle past 1790 days) Posts: 19762 From: Silver Spring, MD Joined: |
The Gnu Image Manipulation Program - the GIMP - has both batch processing (via "Script-Fu") and what you want to do, which is called "changing the color space."
http://www.gimp.org/ There's probably a script out there for doing this already. Apparently you can do it from GIMP's console:
http://www.gimp.org/tutorials/Basic_Batch/ Working with command lines may not be something you're very familiar with. But the GIMP is definitely free, does about as much stuff as most people know how to make Photoshop do, and is super-useful. I've used it for years.
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RAZD Member (Idle past 1728 days) Posts: 20714 From: the other end of the sidewalk Joined:
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Hi Txomin, thanks, and welcome to the fray.
I was hoping for something that the average guy/adolescent could try out, a simplified/alternative experiment that would not require any form of sophisticated instrumentation. I don't know if such a method exists and my searches have come up empty. One thing I was thinking about uses a boat and a lighthouse on a cliff, with the height of the cliff (lighthouse base) above sea level and the height of the lighthouse light above either sea level or the cliff (much of this information is usually provided on navigation charts because it can be used to determine how far away you are from the light. Initially you can see both the top and the bottom of the lighthouse, and the base of the cliff. Measure the angles subtended by them, and simple geometry tells you how far away you are (assuming a right triangle portrays the geometry with sufficient accuracy, then you check that assumption by assuming it is an isosceles triangle and comparing the calculated results -- each assumption should give you min\max limits to the actual distance, also check it with a gps). Now move away until an observer at the top of a tall mast of known height above sea level sees the base of the cliff is almost obscured by the apparent curve of the water. Draw yourself a picture of that and the lines of sight. You can measure the angle of the lighthouse from top to base and calculate your distance from the lighthouse. And you can check that by also using the full height from the base of the cliff to the top of the lighthouse. Concordance between distances eliminates refraction as it would affect the one to the base of the cliff more. Your line of sight to the base of the cliff is also your line of sight tangent to the surface of the sea that almost obscures the base, and from this you can calculate the curvature of the water\earth. Draw it out to see how it works. Enjoy. ... as you are new here, some posting tips: type [qs]quotes are easy[/qs] and it becomes:
quotes are easy or type [quote]quotes are easy[/quote] and it becomes:
quote: also check out (help) links on any formatting questions when in the reply window. For other formatting tips see Posting Tips For a quick overview see EvC Forum Primer If you have problems with replies see Report Discussion Problems Here 3.0 If you use the message reply buttons (there's one at the bottom right of each message): ![]() ... your message is linked to the one you are replying to (adds clarity). You can also look at the way a post is formatted with the "peek" button next to it. Edited by RAZD, : tipsby our ability to understand Rebel American Zen Deist ... to learn ... to think ... to live ... to laugh ... to share. Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)
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Panda Member (Idle past 4035 days) Posts: 2688 From: UK Joined: |
Taz writes:
It depends...(doesn't it always?). Panda, what if I want to use irfanview to change a picture so that if it's slightly white than it turns into completely white and if it's black then it turns into completely black? I painstakingly took pictures of an entire book and now I'm trying to convert it into pdf. One way to turn off-white into white and dark grey into black is to reduce the colour depth of the images.But this can make the images 'spotty' and remove the anti-aliasing that makes text look smooth. Could you post one of the images and I'll have a look? Edited by Panda, : No reason given.Always remember: QUIDQUID LATINE DICTUM SIT ALTUM VIDITUR Science flies you into space; religion flies you into buildings.
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crashfrog Member (Idle past 1790 days) Posts: 19762 From: Silver Spring, MD Joined:
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If you set two plumb bobs a substantial distance apart - say, opposite ends of a very long bridge - and then use a telescope from a vantage point where you can see both, you'll see that they aren't parallel.
It's a convenient experiment for those of us who are landlocked.
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RAZD Member (Idle past 1728 days) Posts: 20714 From: the other end of the sidewalk Joined: |
Hi crashfrog
Yeah, I was thinking of using lasers ...
If you set two plumb bobs a substantial distance apart - say, opposite ends of a very long bridge - and then use a telescope from a vantage point where you can see both, you'll see that they aren't parallel. It's a convenient experiment for those of us who are landlocked. That would certainly solve the problem of refraction. Have you calculated how far apart they would need to be to measure the difference? You could use lasers to send two or three beams of light straight up from a good distance apart and see the same effect, with three lasers you could get confirmation in the results. Enjoyby our ability to understand Rebel American Zen Deist ... to learn ... to think ... to live ... to laugh ... to share. Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)
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Dr Adequate Member Posts: 16113 Joined:
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Alfred Russel Wallace (yes, that Alfred Russel Wallace) engaged in public controversy with the flat-Earthers. His method was as follows. Take a long straight canal (the water of which provides you with a perfectly "flat" surface). Take three sticks (Wallace used sticks four meters long to avoid refraction effects) and erect them along the canal so that each protrudes the same distance perpendicularly from the surface of the canal. Now if the Earth is curved, then if you stand at stick 1 and look at stick 3 so that the tip of stick 3 is coincident with the tip of stick 1, then from that point of view you should see the tip of stick 2 sticking out above the tips of sticks 1 and 3, whereas if it was flat it would be in a straight line with them.
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crashfrog Member (Idle past 1790 days) Posts: 19762 From: Silver Spring, MD Joined: |
Have you calculated how far apart they would need to be to measure the difference? Not all that far, I think. I couldn't find any information on it but I'm pretty sure a guy did this on a bridge in England a hundred years ago. I could be remembering wrong, of course.
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crashfrog Member (Idle past 1790 days) Posts: 19762 From: Silver Spring, MD Joined: |
Oh, maybe that's the experiment I was thinking of. Thanks, Dr. A!
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Taz Member (Idle past 3614 days) Posts: 5069 From: Zerus Joined: |
Not that I'm complaining, but why can't I have sex when I'm drunk?
I've always been glad about this aspect of myself. Can't accidentally get anyone pregnant, my worst fear. Just wondering why I hear it's so easy for other people to have sex and do all kinds of crazy things when they are drunk and it's always the opposite for me.
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xongsmith Member Posts: 2643 From: massachusetts US Joined: Member Rating: 5.7 |
Taz ruminates:
Not that I'm complaining, but why can't I have sex when I'm drunk? I've always been glad about this aspect of myself. Can't accidentally get anyone pregnant, my worst fear. Just wondering why I hear it's so easy for other people to have sex and do all kinds of crazy things when they are drunk and it's always the opposite for me.Not that I'm complaining, but why can't I have sex when I'm drunk? I've always been glad about this aspect of myself. Can't accidentally get anyone pregnant, my worst fear. Just wondering why I hear it's so easy for other people to have sex and do all kinds of crazy things when they are drunk and it's always the opposite for me. We are all under an attack from the viral idiots that foisted Prohibition on the USA. Imagine Christine Lavin's voice here: "What was I thinking?" Hello. Edited by xongsmith, : Whhoooops! Sorry....heh heh....- xongsmith, 5.7d
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Dr Adequate Member Posts: 16113 Joined:
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Not that I'm complaining, but why can't I have sex when I'm drunk? I've always been glad about this aspect of myself. Can't accidentally get anyone pregnant, my worst fear. Just wondering why I hear it's so easy for other people to have sex and do all kinds of crazy things when they are drunk and it's always the opposite for me. I don't think it's just you; the unmanning effects of alcohol are notorious.
Lechery, sir, it provokes, and unprovokes; it provokes the desire, but it takes away the performance: therefore, much drink may be said to be an equivocator with lechery: it makes him, and it mars him; it sets him on, and it takes him off; it persuades him, and disheartens him; makes him stand to, and not stand to; in conclusion, equivocates him in a sleep, and, giving him the lie, leaves him. --- William Shakespeare, Macbeth OK, so it's not peer-reviewed.
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