Abstract: A seesaw-type feeding device for collecting solid materials suspended in a flow field includes a suspension assembly, a material collection assembly, a joint hinge, two anti-collision blocks and an escapement shaking assembly, wherein the latter three of which are located between the suspension assembly and the material collection assembly. The suspension assembly includes a V-shaped floating body and at least three fixed bottom anchors. The material collection assembly includes a collection pocket net, a material container, a delivery part, and an annular water discharging screen mesh. The escapement shaking assembly is located behind the V-shaped floating body and faces the material collection assembly. The material collection assembly is able to shake relatively to the fluid in the flow field, and the escapement shaking assembly drives the material collection assembly to shake.

Abstract: A variable magnification method, apparatus and a computer-readable storage medium is disclosed. The method comprises: acquiring angle parameters for the current position of a camera after receiving a variable magnification instruction; wherein, the variable magnification instruction is configured for instructing the camera to perform the variable magnification based on a target magnification ratio parameter; querying target historical focusing information based on the angle parameters for the current position, wherein, the target historical focusing information comprises a historical magnification ratio parameter and a historical in-focus parameter of the camera; querying a target variable magnification curve based on the historical magnification ratio parameter and the historical in-focus parameter; and controlling the camera to perform the variable magnification based on the target variable magnification curve.

Abstract: A variable magnification method, apparatus and a computer-readable storage medium is disclosed. The method comprises: acquiring angle parameters for the current position of a camera after receiving a variable magnification instruction; wherein, the variable magnification instruction is configured for instructing the camera to perform the variable magnification based on a target magnification ratio parameter; querying target historical focusing information based on the angle parameters for the current position, wherein, the target historical focusing information comprises a historical magnification ratio parameter and a historical in-focus parameter of the camera; querying a target variable magnification curve based on the historical magnification ratio parameter and the historical in-focus parameter; and controlling the camera to perform the variable magnification based on the target variable magnification curve.

Abstract: Provided in an embodiment of the present application are an anti-shake method for a camera and a camera. The method comprises: obtaining current shake data of a camera, wherein the shake data comprises position change data of the camera when the camera shakes, and the shake data is detected by a shake detector; determining, according to a preset relationship between position change of an anti-shake lens for shake compensation and shake data, movement data of the anti-shake lens; and adjusting a position of the anti-shake lens according to the movement data, so that an image sensor captures a shake-compensated image. By applying the embodiment of the present application, anti-shake processing can be performed for the higher or lower frequency shake, improving anti-shake performance.

Abstract: Embodiments of the present application provide an automatic focusing method and a PTZ camera. The method is applicable to the PTZ camera and comprises: calculating a current target object distance from a lens of the PTZ camera to a monitored target monitoring plane based on a pre-established spatial object distance parameter; wherein, the spatial object distance parameter contains a spatial plane equation of a reference monitoring plane; the reference monitoring plane is an equivalent plane of the target monitoring plane; searching in a preset relation table based on the current target object distance, a current magnification of the PTZ camera, determining a position information corresponding to a focus motor of the PTZ camera, the preset relation table including the relationship of the object distance, the magnification and the position information of the focus motor, and driving the focus motor to a position corresponding to the determined position information.

Abstract: Embodiments of the present application provide an automatic focusing method and a PTZ camera. The method is applicable to the PTZ camera and comprises: calculating a current target object distance from a lens of the PTZ camera to a monitored target monitoring plane based on a pre-established spatial object distance parameter; wherein, the spatial object distance parameter contains a spatial plane equation of a reference monitoring plane; the reference monitoring plane is an equivalent plane of the target monitoring plane; searching in a preset relation table based on the current target object distance, a current magnification of the PTZ camera, determining a position information corresponding to a focus motor of the PTZ camera, the preset relation table including the relationship of the object distance, the magnification and the position information of the focus motor, and driving the focus motor to a position corresponding to the determined position information.

Abstract: Provided in an embodiment of the present application are an anti-shake method for a camera and a camera. The method comprises: obtaining current shake data of a camera, wherein the shake data comprises position change data of the camera when the camera shakes, and the shake data is detected by a shake detector; determining, according to a preset relationship between position change of an anti-shake lens for shake compensation and shake data, movement data of the anti-shake lens; and adjusting a position of the anti-shake lens according to the movement data, so that an image sensor captures a shake-compensated image. By applying the embodiment of the present application, anti-shake processing can be performed for the higher or lower frequency shake, improving anti-shake performance.

Abstract: The present invention relates to the field of video camera image processing. Disclosed are an intelligent adjustment method when a video camera performs automatic exposure and an apparatus therefor. In the present invention, a first corresponding relationship between a rate and an aperture is pre-set. The first corresponding relationship records corresponding upper and lower aperture limits required by each rate for achieving the best depth of field of an image. The method comprises the following steps: acquiring the current rate of a video camera; searching for upper and lower aperture limits corresponding to the current rate in a first corresponding relationship; if the current aperture value exceeds the range of the searched upper and lower aperture limits corresponding to the current rate, adjusting the current aperture value to be within the range of the upper and lower aperture limits; and according to the adjusted aperture value, adjusting exposure time and gain to satisfy the need of image brightness.

Abstract: The present invention relates to the field of video camera image processing. Disclosed are an intelligent adjustment method when a video camera performs automatic exposure and an apparatus therefor. In the present invention, a first corresponding relationship between a rate and an aperture is pre-set. The first corresponding relationship records corresponding upper and lower aperture limits required by each rate for achieving the best depth of field of an image. The method comprises the following steps: acquiring the current rate of a video camera; searching for upper and lower aperture limits corresponding to the current rate in a first corresponding relationship; if the current aperture value exceeds the range of the searched upper and lower aperture limits corresponding to the current rate, adjusting the current aperture value to be within the range of the upper and lower aperture limits; and according to the adjusted aperture value, adjusting exposure time and gain to satisfy the need of image brightness.