An image detection method of a hand, comprising: determining a first starting point in a connected domain in a hand image to be detected; determining n farthest extremum points that are different from the first starting point and are in the connected domain in the hand image to be detected, wherein an Nth farthest extremum point among the n farthest extremum points is a pixel point which is in the connected domain and which has a maximum geodesic distance from an Nth starting point, an (N+1)th starting point is the Nth farthest extremum point, both n and N are positive integers, and N≤n; performing region growing by respectively taking the n farthest extremum points as initial points, so as to acquire n regions in the connected domain; and determining an available region that satisfies a selection condition by determining whether a relationship between a preset feature of each region among the n regions and a preset feature of the connected domain satisfy the selection condition, wherein the selection condition of the available region comprises at least one of A, B or C: A: a first ratio of a length of each region to a maximum width of the connected domain is not smaller than 1/3 and not greater than 1.5; B: a second ratio of a width of each region to a maximum width of the connected domain is not greater than 1/5; and C: a third ratio of an area of each region to an area of the connected domain is not greater than 1/5. determining a first starting point in a connected domain in a hand image to be detected; determining n farthest extremum points that are different from the first starting point and are in the connected domain in the hand image to be detected, wherein an Nth farthest extremum point among the n farthest extremum points is a pixel point which is in the connected domain and which has a maximum geodesic distance from an Nth starting point, an (N+1)th starting point is the Nth farthest extremum point, both n and N are positive integers, and N≤n; performing region growing by respectively taking the n farthest extremum points as initial points, so as to acquire n regions in the connected domain; and determining an available region that satisfies a selection condition by determining whether a relationship between a preset feature of each region among the n regions and a preset feature of the connected domain satisfy the selection condition, wherein the selection condition of the available region comprises at least one of A, B or C: A: a first ratio of a length of each region to a maximum width of the connected domain is not smaller than 1/3 and not greater than 1.5; B: a second ratio of a width of each region to a maximum width of the connected domain is not greater than 1/5; and C: a third ratio of an area of each region to an area of the connected domain is not greater than 1/5. A: a first ratio of a length of each region to a maximum width of the connected domain is not smaller than 1/3 and not greater than 1.5; B: a second ratio of a width of each region to a maximum width of the connected domain is not greater than 1/5; and C: a third ratio of an area of each region to an area of the connected domain is not greater than 1/5. <EOS>