jimp-dev/jimp

Image size increases on quality reduction

Open

#1 105 ouverte le 2 nov. 2022

Voir sur GitHub
 (0 commentaires) (0 réactions) (0 assignés)JavaScript (785 forks)batch import
bugfile size issuehelp wanted

Métriques du dépôt

Stars
 (13 218 stars)
Métriques de merge PR
 (Aucune PR mergée en 30 j)

Description

Using jimp's quality method does not give a expected linear result. After passing the quality percentage above the range of 60-65, the image quality increases.

const buffer = * JPEG image buffer *
console.log('Before Compression Size is ', Buffer.byteLength(buffer))
const data = await jimp.read(buffer).then(image => image.quality(65))
buffer = await new Promise((resolve, reject) => {
    data.getBuffer((jimp.MIME_JPEG), (err, buff) => {
        if (err) reject(err)
        console.log('After compression Size is ', Buffer.byteLength(buff))
    })
})

Results in:

Before Compression Size is: 429 
After Compression, Size is 744

Guide contributeur