Which format/resolution/DPI should be used

File Format

DinoCapture can save snapshots as BMP or JPG. The default format of BMP is uncompressed but results in a larger file size. The JPG format is compressed, resulting in a much smaller file size at the expense of the loss of image information. JPG compression is "lossy", meaning information lost in compression cannot be restored later, however the degree of compression used by DinoCapture when saving with the JPG format is usually not noticeable. In general, we recommend to keep BMP as the default whenever possible (especially medical and scientific applications), and then save a copy as a JPG whenever a smaller file size is needed (such as for posting online). One exception is when capturing images to be used with geotagging (location data) support. Geotagging requires EXIF (image meta data) support which is a feature of the JPG format only. In addition to the default formats of BMP or JPG, the save as dialog also allows saving in a number of other formats. See below for a summary:

FormatAvailable as defaultAvailable in save-as dialogCompressionFile sizeEXIF supportUsage
BMP Yes Yes No Largest No Very common
JPG Yes Yes Lossy Small Yes Very common
PNG No Yes Lossless Medium No Common
TIFF No Yes Lossy/Lossless Medium No Uncommon
GIF No Yes Lossless Large No Rare

How to change the format?

Change the default format by selecting Settings > Default Picture Format. Save a copy with a different format by selecting the image on the left side menu and then clicking Save as.

Resolution

The maximum resolution available for capturing images depends on the device model:
0.3 MP = 640 x 480 Example
1.3 MP = 1280 x 1024 Example
5 MP = 2592 x 1944 Example

In most cases it is recommended to capture the image in the highest resolution available, and then save the image in the same resolution it was captured in. You can "shrink" the image later, but cannot enlarge the image without losing quality.

Typical file sizes

JPG Images:
640 x 480 = 50kB - 80kB
1280 x 1024 = 200kB - 400kB
2592 x 1944 = 400kB - 1MB*
*Typically MJPEG approximately 50% smaller file size than YUY2.

DPI

DinoCapture has an option for default DPI as well as the ability to specify DPI when saving individual images. DPI is an instruction for a printer, and does not have bearing on the image quality or file size. When printing an image captured in DinoCapture often the desired physical print size (e.g. 4" x 4") is specified. If you do not specify the physical print size, it is calculated using the resolution of the image and the DPI value.

For example:

1.3MP: 1280 x 1024 image set to 300 DPI, 1280/300 = 4.27", 1024/300 = 3.41", the print size if not specified will be 4.27" x 3.41"

5MP: 2592 x 1944 image set to 300 DPI, 2592/300 = 8.64", 1944/300 = 6.48", the print size if not specified will be 8.64" x 6.48"