Resolution adjusting method
A method for adjusting resolution is applicable to an image capturing device, such that the image capturing device can analyze an amount of objects in the image captured thereby and determine a resolution for storing the image according to the amount of objects in the image, thereby making use of storage resources effectively. It is determined whether to zoom in/out the captured image or to lower the resolution of the image capturing device by analyzing the amount of the objects in the captured image and comparing the analyzed amount of the objects with one or more threshold values.
1. A resolution adjusting method, applicable to an image capturing device, wherein the image capturing device comprises a camera module and a storage unit, the resolution adjusting method comprising:
capturing an image with a first resolution by the camera module;
analyzing an amount of objects in the image, comprising:
performing a recognition procedure to recognize and calculate an amount of subjects in the image; and
determining the amount of the objects according to the calculated amount of the subjects;
comparing the amount of the objects with at least one threshold value;
when the amount of the objects is smaller than at least one of the at least one threshold value, lowering the resolution of the image from the first resolution to a second resolution according to the at least one threshold value, and storing the image with the second resolution in the storage unit; and
when the amount of the objects is greater than or equal to the threshold value, storing the image with the first resolution in the storage unit.
2. The resolution adjusting method according to claim 1 , wherein the step of analyzing the amount of the objects in the image further comprises:
performing an edging procedure to edge the image;
calculating an amount of graph blocks in the edged image; and
determining the amount of the objects according to the calculated amount of the graph blocks.
3. The resolution adjusting method according to claim 1 , wherein the step of analyzing the amount of the objects in the image further comprises:
performing an edging procedure to edge the image;
calculating content of edging elements in the edged image; and
determining the amount of the objects according to the calculated content of the edging elements.
4. The resolution adjusting method according to claim 1 , wherein the first resolution is different from the second resolution for a specific factor.
5. The resolution adjusting method according to claim 1 , wherein the first resolution and the second resolution are two resolutions in a setting option of a resolution of the image capturing device, and the first resolution is different from the second resolution for a specific level.