Size of image.?

Question

I took some shots at 6MP my best; also took some at 3. After hitting properties on computer it shows some images at 2.67 MB and some at 2.80 MB. Those MB numbers, are they the difference between shotting at 6 MP and 3 MP. Thank you. PS or what would show in properties which photos are which?

Answer 1

To tell which photos are which, you just need to find the pixel dimensions somewhere. In Photoshop or Elements, you do this under Image > Resize > Image size. You must check an UNEDITTED image or you may have lost some of the pixels.

You might also see the dimensions of the picture displayed somewhere on the screen as well as the resolution. For instance, in Photoshop Elements 5.0, it gives this information at the bottom left side of the frame. An uneditted image from my wife's D50 says that it's 10.027" x 6.667" at 300 ppi. Multiply the inches by the ppi and then you can get the total pixels.

10.027 x 300 = 3008
6.667 x 300 = 2000
3008 x 2000 = 6,016,000 or 6.01 MP

Or, for yet another way to find this, check the META file on the image. (File > File Info > Camera Data) You will find the pixel dimensions here and you can just do the math to get total pixels.

A 6 MP image would be something like 3000 pixels by 2000 pixels, no matter what degree of compression (image quality) you used. Similarly, a 3 MP image would be something like 2000 px by 1500 px. (2400 x 1250, something close to this area...)

Answer 2

I'm assuming you shot the images in JPEG format on your digital camera, which uses a "lossy" image compression algorithm to reduce the size of stored file, this is why the file sizes are so close to one another.

If your camera was capable in shooting in RAW or TIFF you would see a big difference in filesize between 6MP & 3MP. Also your memory card would fill up very quickly because of the huge file sizes.

The way to dertmine which photos are which is to open the folder in which the files are stored in Windows Explorer.

From the pull down view menu in Windows explorer switch to thumbnails view and ensure status bar has a tick next to it in the view menu.

You can change the view type and switch status bar on by clicking on the option in the view pull down menu.

Now left click once on an image thumbnail it will display the image information in the grey status bar at the bottom of the window. The first thing it will say is Dimensions w x h, e.g. 1984x 1488. The higher the resolution the bigger the dimensions, i think 1984 x 1488 equates roughly to 3MP. The 6MP images will have much bigger numbers than the 3MP ones.

Hope this helps

Mike

Answer 3

Your 6 MP and 3 MP stand for the pixelsize of the picture. the 2.8 MB
and 2.67 MB are the size of the picture file ( ect. 2.8 MegaBite )
You will get the best pictures, by using the 6 MP.

best regards

Answer 4

yaa surely the ones which r bigger in size r shot in 6MP nd the ones in smaller size r shot in 3 MP..
i hope u got the answer....