const realSize = await this._sizeOfBuffer(buff);

        const buffSrc = await writeTempImage(buff, 'png');
        const { pathBmpImage, pathSVGImage } = this._svgBmp(type);

        await execSync(`convert ${buffSrc} -colorspace gray -threshold 50% ${pathBmpImage}`);
        await execSync(`convert ${pathBmpImage} ${pathSVGImage}`);
        await execSync(`convert ${pathSVGImage} ${buffSrc}`);

        await execSync(`convert ${buffSrc} -colorspace gray -threshold 50% ${pathBmpImage}`);

        if (isTransp) {
            await execSync(`potrace ${pathBmpImage} -s -t 10 -r 90 -o ${pathSVGImage}`);
        } else {
            await execSync(`potrace ${pathBmpImage} -s -t 20 -r 90 -o ${pathSVGImage}`);
        }

        if (isBackground) {
            await execSync(`convert -background none ${pathSVGImage} ${buffSrc}`);
        } else {
            await execSync(`convert ${pathSVGImage} -quality 100 ${buffSrc}`);
        }

        await execSync(`convert ${buffSrc} -resize ${realSize.width}x${realSize.height} ${buffSrc}`);
        buff = fs.readFileSync(buffSrc);
        this.unlinkSync([pathBmpImage, pathSVGImage, buffSrc]);
        return buff;