【免费】18308045-谷正阳-计算机视觉期中作业-LectureNodeforSeamCarving1资源-CSDN文库

需积分: 0 105 浏览量 2022-08-03 22:53:32 上传评论收藏 6.52MB PDF 举报

资源推荐

资源详情

资源评论

Lecture Node for Seam Carving

Zhengyang Gu Sun Yat-sen University [email protected]

Abstract

The lecture gave us some basic concepts about seam

carving, which are very intriguing. Therefore, I read the

papper[2] which rst introduce seam carving and some

other related pappers, in order to dig deeper into this al-

gorithm.

1. Introduction

Image retargeting is to change the size of pictures on a

website when the website is accessed by dierent divices

with various screen sizes. The simplest way is scaling and

cropping1. However, scaling may distort important contents

in pictures. For example, the cat1 becomes obviously dis-

torted after scaling. And cropping may remove important

contents at the periphery of pictures. For instance, some

of the tentacles near the edges of the picture1 are removed.

Therefore, content-aware image resizing approaches that

can maintain important contents when resizing pictures is

in great demand.

Seam carving is a content-aware image resizing appo-

rach. The basic idea of it is to remove the most unimpor-

tant pixels in a seam which is intuitively a line. Therefore, it

can eliminate redundance and keep consistency of pictures

at the same time. For example, the picture2 is resized by

seam carving, while the cat is not distorted and the tentacles

are not removed.

2. Background

There are some other content-aware image resizing meth-

ods mentioned by the paper[2]. For example, use top down

methods like face detectors[10] or bottom down methods

like visual saliency methods[7] to build saliency map. And

then based on the saliency map, use intelligent cropping

methods to resize the image[9]. Another paper[4] pays at-

tention to users’ perception on the adapted images. Their

method automatically detect and transmit the most impor-

tant part of the image to devices.

And the paper[2] also mentioned other areas where seams

are used. For instance, the paper[1] nds the best seams

to combine parts of a set of pictures into a single compos-

ite picture. And the computation of seams can be done by

(a) Original

(b) Scaling (c) Cropping

Figure 1: The original picture shows a cat with some tenta-

cles. The picture is scaled and cropped.

Figure 2: Seam carving

other ways, including Dijkstra’s shortest path algorithm[6]

and graph cuts[3].

1

本内容试读结束，登录后可阅读更多

下载后可阅读完整内容，剩余8页未读，立即下载

内容反馈

kdbshi

粉丝: 56
资源: 300

最新资源

资源上传下载、课程学习等过程中有任何疑问或建议，欢迎提出宝贵意见哦~我们会及时处理！点击此处反馈

feedback-tip