Aviation - BEAUTY

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Em xin phép mở topic này với mong muốn mọi người cùng chia sẻ các kiến thức về ảnh hàng không cũng như các thông tin về các website ảnh hàng không và hệ thống tiêu chí đánh giá ảnh của họ để mọi người yêu thích ảnh hàng không có thể tiếp cận dễ dàng hơn. Ngoài ra còn có thể giúp mọi người tham gia bình ảnh dễ hơn xét từ phương diện ảnh hàng không.

Cảm ơn các bác,

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Em xin mở đầu bằng tài liệu của bác nguyenphuong sưu tầm từ jetphotos.net

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Jetphotos.net - Upload Guide v.2.0a

Backlit
Don't take pictures with the sun in your eyes-the sun is there for many purposes one of which is to give us light with which to see things, shooting against the sun puts the visible half of the aircraft in shadow which means we can't see it to its advantage. There are some airports which suffer badly from backlit pictures, Manchester, Frankfurt, Atlanta and Brisbane are the most popular ones at this site but all airports produce backlit shots from time to time. Zurich for example has excellent facilities for photographers but the viewing deck becomes backlit in the afternoon so whether you are at Zurich or Brisbane or Atlanta the thing to remember is that you need to move to a spot with the sun at your back because if you upload backlit shots they will be rejected. An exception to this is when the photographer is creating a sunset/sunrise type at which time the vivid colors and weak sunlight produce very pleasing results-properly executed dusk and dawn shots are always welcome but please don't flood us with such images because they are very difficult to get right.

Bad Motive
Means we are not sure what you are trying to show us with your picture, what is the motive for the shot? It can also mean that your picture is not sufficiently aviation related for us to accept-this is particularly the case with window view shots which must either be an overview of an airport or have a significant amount of the aircraft in view and be visually appealling, a wingtip plus a few clouds is not what we are looking for here. Be careful with airport views too, an overview of the front of an airport is usually ok but a picture of some random people in coffee bars is not.

Bad quality
A bad quality rejection means that the picture has many problems and is not worth considering further editing.

Badinfo
The auto-fill feature will only reflect what is already in the database. If that information is wrong, you will get a badinfo reject unless you check the information yourself which can be done using the JP.net census. New registrations can also be checked here. Failing that, a simple search on Google will almost certainly yield the required information. Uploading information such as Boeing 737-3.. or 737-300 is not acceptable and will be rejected if the registration is known.

Airports should be uploaded by filling in the 4-letter code (KLAX, EGCC, YSSY, LEBL etc) in both, the aircraft and registration fields of the auto-fill feature. If the airport is not listed, please use the "New Airport" form, which can be found in the addphoto page. If the location is not an airport, you may use the "Other Location" option. For contrail shots, the location should reflect the location, where you took the photo. Unless you were on another aircraft, "inflight" is the wrong location.

Airlines should also be entered using the drop down menus. If the aircraft you need is not in the menu, or auto-fill function, please complete the appropriate form in the upload page to request it be added.

Blurry
Simple - we don't accept blurry pictures, it is impossible to define what level of blurriness causes a rejection but it should be remembered that unlike a soft picture a blurry picture will never be sharp. Common faults that cause blurriness are not using a fast enough shutter speed and camera shake, for those using SLRs the general rule is too make sure that the shutter speed is higher than the focal length at which you are shooting.

Categories/Genre
To ensure that visitors to the site can find what they are looking for we ask that you make sure the correct categories and genre (civilian/military) have been checked at the time of upload. If no categories apply then don't tick any of them. For clarification it should be remembered that dawn and dusk shots are considered to be night shots, and Vintage/Warbird applies to anything which is no longer in regular service and has been preserved.

CMOS dust / Scan
Dust on the CMOS is the biggest drawback of DSLRs and cannot realistically be avoided, but dust spots are easily removed from pictures by using the cloning tool in your editing program, it is a very simple procedure and one which every digital photographer should be able to do. Dust spots on pictures are too easy to remove for us to consider adding such images to the database. A common problem when using slide/print scanners is ensuring that the scanner and print or slide is clean, free from hairs/dust particles and not scratched. It is these things which cause a bad scan rejection.

Color
The screening team at JetPhotos see thousands of pictures every week so we know what colors planes are supposed to be, poor editing often results in colors which just dont look right but the most common problem is when pictures are taken from behind glass in airport terminals because this glass is tinted and creates a color cast on your pictures which does not reflect the colors you would see if you were the other side of the glass. Every editing program has a tool to alter colors and if you have been shooting from behind tinted glass these tools need to be used to make the pictures acceptable.

Composition/centered
The composition of the is not visually appealing. This can be for example: bad centering of the aircraft or showing too much aircraft for a close up. It can also mean, that the angle that you have used does not show the aircraft in a very good light, 'rear end' shots are particularly vulnerable to getting this rejection reason as are shots taken directly underneath an aircraft or just a little off the runway centerline on final approach. If a shot shows a clear motivation then we are obviously prepared to be flexible, such situations might include a smoky touchdown or a strong crosswind approach, an aircraft placed off center on purpose to include a distinctive background or to enhance the expression of a photo.

Compression
Save your images at a high resolution, saving at low resolution is great for saving disk space but it means you are loing large amounts of quality from the image, areas which are the first to show signs of over-compression are where colors border each other in particular the registration and cockpit areas.

Contrast
If a picture is rejected for "contrast" it means that the difference between the dark and the light areas of the picture are either too high (high contrast) or too low (low contrast).

Cropping
This means that the picture has not been cropped properly, we often see pictures with white edges visible and these should have been cropped out.

Double upload
This will occur if you upload the same picture twice.

File Error
An error ocurred during the upload phase of your photo, which deems the photo unreadable. Please resubmit the photo again.

Glare / Dirt
Glare from the sun and reflections on windows are the main culprits here, avoiding sun glare through aircraft windows is almost impossible and we do not recommend that you uploads pictures taken from inside aircraft unless the sun is behind you. if you are shooting from behind glass never use a flash as your picture will be completely unsuitable for JetPhotos, other than that be sure that when you are framing your subject you check around it through the viewfinder and make sure there are no reflection on the glass which will result in a rejection if uploaded. Additionally, a photo taken thru a dirty aircraft window will also be rejected, if that dirt is too distracting.

Heat distortion
As temperatures rise heat distortion is more likely to occur, particularly at airports, it is evidenced by an apparent blurriness of the subject and is more aparrent when shooting at distance. To avoid heat haze try and shoot in the early morning or late evening and allow a subject to get as close as possible before pressing the shutter. Heat distortion cannot be fixed by editing and contrary to what some people say there is no such thing as a heat haze filter.

Horizon
One of the most common rejection reasons, it means the picture is not level. To ensure your picture is level use a vertical reference point such a building to straighten things out. All shots should be level, this includes window views where the horizon is visible and cabin/flight deck shots.

Manipulation
Any picture which has been significantly altered during the editing process will be rejected, this means adding things that were not originally in the picture or removing significant elements of the shot. Anybody found to be uploading fake pictures (or pictures that are not theirs) can expect to be permanently banned from the site.

Obstructing Objects/Foreground Clutter
This means that the aircraft is not fully visible due to it being obstructed by anything from long grass to catering trucks. Aircraft on their stands are almost always surrounded by service vehicles which make photography very difficult if you want the results to end up on JetPhotos, long grass is also a problem if you shooting at the perimeter-as are fences, light poles and other airport equiptment.

Overexposed
This means that the sensor or film was exposed to too much light and has resulted in the picture being pale in color and having a white cast to it. Light meters in cheaper cameras are easily fooled and the nice deep blue sky of a winters day will fool them into overexposing the aircraft. The most important thing is for the aircraft to be correctly exposed, provided the rest of the image is not too dark or too bright your picture should be acceptable.

Overprocessed
This rejection may apply to photos which simply look overprocessed. This can be for example an improper use of noise removal programs up to the result of getting a plastic like look or smufgy edges. Also, halos caused by wrong sharpening settings or other wrong post processing settings, will result in a rejection.

Oversharpened
All images require a degree of sharpening to make them acceptable to JetPhotos but if you overdo it the picture will look worse than when you started. Oversharpening can be recognised by the formation of jagged lines along cheatlines, wing edges and tail fins, in addition to this if you oversharpen an image it can result in a 'halo' effect appearing in areas of high contrast.

Part of subject missing/cut off
This is mostly a problem with shots which are taken from the side of the aircraft but it is somewhat subjective as in many cases cropping out parts of the aircraft improves the picture dramatically, but if something has been cut off without a clear motive for doing so it will most likely be rejected.

Similar
Means, that you have a similar photo already in the db. Please upload only your best photos, try other angles, be creative. Similar refers to same registration, same angle/composition or same background, even if taken at different dates. However, if a new uplod is of a significantly better quality, we may cosider to accept it. For cockpit shots or wing views, do not upload photos of any detail. We will only accept a certain number of cockpit or window shots taken in the same aircraft.

Too far
Simply means that the subject is too far away and there is too much dead space in the picture, try and get closer if you can. You may be able to rescue the situation by cropping closer to subject but this will result in a loss of quality.

Too much noise or grain
Noise is mostly a problem with digital cameras. Low end (cheaper) digital cameras are the worst offenders but it can still affect the more expensive DSLRs. An underexposed photo will tend to show more noise, when brightening it up.
What the noise is for digital photography, is grain for film and slide users. Too much gain means, that areas of the picture are affected by discoloured pixels which give the picture an overall poor quality. Blue skies are usually the first areas to see this effect.

Underexposed / Too dark
This means that the sensor or film was not exposed to enough light and has resulted in the picture being too dark or underexposed. Usually, the shadows will then too dark, with a more or less complete lack of details. Light meters in cheaper cameras are easily fooled and the nice deep blue sky of a winters day will fool them into overexposing the aircraft. The most important thing is for the aircraft to be correctly exposed, provided the rest of the image is not too dark or too bright your picture should be acceptable. Pictures taken under cloudy skies or at dusk and dawn frequently need to be brightened up to make them acceptable for the database, please remember to do this before uploading your picture.

Undersharpened / soft
This means your picture is not sharp enough for the database, go back to your editing program and add a little more sharpening until you can get the picture to look sharp and then reupload. Softness is usually a result of poor editing rather than a problem with the actual piture taking. Many cheaper lenses will give you a soft image if used under poor light and at longer focal lengths, if this happens it is unlikely that any amount editing will save the image.

Please note:
If a photo is rejected, it can of couse be uploaded again, granted, that a significant and visble improvement has been made. Anybody found to be uploading the same rejected pictures with no changes at all can expect to be temporarely banned from the site.

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Có thể tham khảo thêm trong forum của airliners.net về cách chụp và các lý do loại (reject) ảnh mà người gửi tranh cãi bằng cách link cho xem ảnh đó. Nhiều tấm rất đẹp nhưng vẫn bị loại do phần đuôi hơi mờ, mà có phải do focus đâu, tại luồng hơi động cơ!
http://www.airliners.net/discussions...phy/index.main

[nguyenphuong]

Bác Xi ti em (tên rất ấn tượng, dễ đọc) nên sửa lại bài tiếng Anh chút, Bold phần tiêu đề từng mục cho dẽ theo dõi.

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Dạ em sẽ sửa ngay ạ. Cảm ơn bác.

[nguoionoixa]

like mạnh chủ đề này, để có thể post được bài. :D:D:D nhưng mà nhiều chữ quá:D