Tuesday, October 6, 2015

6. Define these 35 words

1. Pixels: Is an area of a picture that has illumination, one that composes an image.

2. Image Resolution:  is the detail an image holds.

3. Megabyte:

 4. Megapixel: means one million pixels. The resolution of digital cameras and camera phones is often measured

5. Gigabyte: a unit of information equal to one billion (109) or, strictly, 230 bytes.

6. Jpeg: a format for compressing image files.

7. Raw: is a file format that captures all image data recorded by the sensor when you take a photo. When shooting in a format like JPEG image information is compressed and lost.

8. Tiff: Type of filing save. 

9. Png:  is a raster graphics file format that supports lossless data compression

 10. White balance: the color balance on a digital camera.

 11. Histogram: type of graph. 

 `12. Aperture: one of the three pillars of photography, in the lens. 

 13. Shutter speed: is the time for which a shutter is open at a given setting.

 14. Depth of field: the distance between the nearest and the furthest objects that give an image judged to be in focus in a camera.

 15. Aperture priority: an exposure system used in some automatic cameras in which the aperture is selected by the user and the appropriate shutter speed is controlled automatically. 

 16. Shutter priority: a system used in some automatic cameras in which the shutter speed is selected by the user and the appropriate aperture is then set by the camera.

 17. Bitmap: Like a logo

 18. Exposure: In photographyexposure is the amount of light per unit area (the image plane illuminate times the exposure time) reaching a photographic film or electronic image sensor, as determined by shutter speed, lens aperture and scene luminescence.

19. Watermarking: is marking your own signature on your picture to make sure nobody takes credit for your picture.

 20. Optical zoom: is true zoom feature, it allows you to zoom in and out on the LCD or viewfinder.   

21. Digital zoom:  is a method of decreasing the apparent angle of view of a digital photographic or video image.

22. Bracketing:  is the general technique of taking several shots of the same subject using different camera settings.

23. Light meter: There are two general types of light meters: reflected-light and incident-light. Reflected-light meters measure the light reflected by the scene to be photographed. All in-camera meters are reflected-light meters. Reflected-light meters are calibrated to show the appropriate exposure for “average” scenes. 

24. Image stabilization: is a method to reduce blurry parts of a photo.

25. Noise: Image noise is a random item, possibly in the back, that's very noticeably, practically screaming out to the viewers. 

 26. Lag time: The period of time between two close events.

 27. Hot shoe: is on the top of a camera to attach a flash and other wires. 

 28. Fisheye: Type of wide lens, covers 180 degree angles.  

29. Macro: Short for macro lens, a type of lens that makes small items, larger than life. 

30. Telephoto: A longer focus lens than normal. 

31. Wide angle:  having a short focal length and hence a field covering a wide angle.

32. DSLR: A digital single-lens reflex, its made for focusing on one image. 

33. Dynamic range: Changes in the difference between the brightest and darkest areas. 

34. Digital negative: the original photo. 

35. Exposure compensation: In Aperture Priority mode, the aperture remains at your chosen setting. Accordingly, the camera will adjust shutter speed to accomodate exposure compensation adjustments. In the first example that I mentioned of f/5.6 and 1/250s, the camera would adjust the shutter speed to 1/125s for a +1 EV adjustment.

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