1. An eyeglass lens processing apparatus for processing a peripheral edge of an eyeglass lens based on target lens shape data, comprising:
a mode setting unit which shifts a processing mode to a two-step processing mode in which a cup for attaching the lens to a chuck axis is changed from a large diameter cup to a small diameter cup on the way of processing;
a roughing path data computing unit for computing first roughing path data larger than the target lens shape data by a predetermined finishing margin, and second roughing path data having a radius vector larger by at least \u0394a than at least radius vector data of the large diameter cup based on the first roughing path data and the radius vector data of the large diameter cup, \u0394a being a length set to avoid processing interference between a roughing tool and the large diameter cup; and
a processing controller for roughing the peripheral edge of the lens attached to the large diameter cup based on the second roughing path data in response to a processing start signal, thereafter stopping the processing and further resuming the processing,
wherein the processing controller performs, when a processing resuming signal is inputted, processing control of either finishing the peripheral edge using a finishing tool after roughing the peripheral edge of the lens replaced with the small diameter cup based on the first roughing path data using the roughing tool, or finishing the peripheral edge based on finishing path data using the finishing tool without roughing.
2. The eyeglass lens processing apparatus according to claim 1, wherein the second roughing path data are corrected composition path data in which the first roughing path and the path of the radius vector data of the large diameter cup added with \u0394a are composed to provide an outermost composition path and an area where the first roughing path and the path of the radius vector data of the large diameter cup added with \u0394a intersect is further corrected to avoid the processing interference during the processing.
3. The eyeglass lens processing apparatus according to claim 1, wherein the radius vector of the second roughing path data do not exceed a maximum distance determined based on rotation moment load applied to the lens during the processing with the small diameter cup.
4. The eyeglass lens processing apparatus according to claim 1, wherein the second roughing path data are corrected composition path data in which the first roughing path and the path of the radius vector data of the large diameter cup added with \u0394a are composed in a shape not exceeding a maximum distance determined based on rotation moment load applied to the lens during the processing with the small diameter cup to provide an outermost composition path and an area where the first roughing path and the path of the radius vector data of the large diameter cup added with \u0394a intersect is corrected to avoid the processing interference during the processing.
5. The eyeglass lens processing apparatus according to claim 4, wherein the maximum distance is 25 mm.
6. The eyeglass lens processing apparatus according to claim 1 further comprising:
a determining unit for comparing stored radius vector data of the large diameter cup and simulated radius vector data after finishing to determine whether or not the processing interference occurs; and
a display unit for displaying the determined result when the processing interference occurs.
7. The eyeglass lens processing apparatus according to claim 1 further comprising a cup holder supporter corresponding to the size of the large diameter cup, the cup holder supporter being fit to a cup holder of the chuck axis and detachable therefrom.
8. The eyeglass lens processing apparatus according to claim 1 further comprising a lens presser supporter corresponding to the size of the large diameter cup, the lens presser supporter being fit to a lens presser of the chuck axis and detachable therefrom.
9. The eyeglass lens processing apparatus according to claim 1, wherein the cup includes:
a small diameter cup including a base mounted in a cup holder of the chuck axis and a small diameter flange attached to the base, one surface of the flange to be in contact with a surface of the lens through an adhesive material; and
a supporter having an opening for inserting and removing the base of the small diameter cup, and including a surface to be in contact with the surface of the lens through an adhesive material having a larger diameter than that of the flange of the small diameter cup and a surface to be fit to the base side of the flange of the small diameter cup.
10. The eyeglass lens processing apparatus according to claim 9, wherein the adhesive material is a double-faced tape having a cut separatable at a boundary between the flange of the small diameter cup and the supporter.
11. The eyeglass lens processing apparatus according to claim 9, wherein the supporter is provided with hooks for removing the supporter from the small diameter cup.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for tracking a reference picture on an electronic device, comprising:
receiving a bitstream;
decoding a portion of the bitstream to produce a decoded reference picture;
tracking the decoded reference picture in a decoded picture buffer (DPB) with reduced overhead referencing based on a designated picture, wherein tracking the decoded reference picture comprises:
determining a picture order count (POC) based on the designated picture;
determining a cycle parameter poc_cycle based on the designated picture; and
obtaining the decoded reference picture according to the POC and the cycle parameter poc_cycle; and
decoding a picture based on the decoded reference picture.
2. The method of claim 1, wherein the designated picture is an instantaneous decoding refresh (IDR) picture.
3. The method of claim 1, wherein the cycle parameter is reset based on the designated picture.
4. The method of claim 1, wherein a buffer description of the decoded reference picture comprises a picture order count (POC), a cycle parameter, a temporal identifier and a scaling parameter.
5. The method of claim 1, wherein a resolution of the decoded reference picture is different from a resolution of the picture.
6. The method of claim 5, wherein the method further comprises processing transform coefficients of the decoded reference picture based on a scaling parameter to decode the picture.
7. The method of claim 1, wherein tracking the decoded reference picture comprises tracking a decoded reference picture collection that includes the decoded reference picture.
8. The method of claim 1, wherein tracking the decoded reference picture comprises:
obtaining a buffer description; and
modifying the buffer description.
9. The method of claim 8, wherein modifying the buffer description comprises at least one of deleting an entry, adding an entry and replacing an entry.
10. An electronic device configured for tracking a reference picture, comprising:
a processor;
memory in electronic communication with the processor;
instructions stored in the memory, the instructions being executable to:
receive a bitstream;
decode a portion of the bitstream to produce a decoded reference picture;
track the decoded reference picture in a decoded picture buffer (DPB) with reduced overhead referencing based on a designated picture, wherein tracking the decoded reference picture comprises:
determining a picture order count (POC) based on the designated picture;
determining a cycle parameter poc_cycle based on the designated picture; and
obtaining the decoded reference picture according to the POC and the cycle parameter poc_cycle; and
decode a picture based on the decoded reference picture.
11. The electronic device of claim 10, wherein the designated picture is an instantaneous decoding refresh (IDR) picture.
12. The electronic device of claim 10, wherein the cycle parameter is reset based on the designated picture.
13. The electronic device of claim 10, wherein a buffer description of the decoded reference picture comprises a picture order count (POC), a cycle parameter, a temporal identifier and a scaling parameter.
14. The electronic device of claim 10, wherein a resolution of the decoded reference picture is different from a resolution of the picture.
15. The electronic device of claim 14, the instructions being further executable to process transform coefficients of the decoded reference picture based on a scaling parameter to decode the picture.
16. The electronic device of claim 10, wherein tracking the decoded reference picture comprises tracking a decoded reference picture collection that includes the decoded reference picture.
17. The electronic device of claim 10, wherein tracking the decoded reference picture comprises:
obtaining a buffer description; and
modifying the buffer description.
18. The electronic device of claim 17, wherein modifying the buffer description comprises at least one of deleting an entry, adding an entry and replacing an entry.