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59 uploadobj f obj. image Image fr. image. . cvs document. ctx cvs. scale image. max_width max_height [最大宽/高] image. image. = max_width max_height [最大宽] image. max_width cvs. max_width cvs. image. max_width image. cvs. image. cvs. image. [最大高] image. max_height cvs. max_height cvs. image. max_height image. cvs. image. cvs. image. 750 || image.height > 480){ image.height){ 图片宽高 mpImg MegaPixImageimage mpImg.cvs maxWidth maxHeight quality orientation Orientation 图片 newImageData cvs. 后台处理
